Mercedes Benz brake light switch stop light switch - where is it - and how to know how to find it

Here is a comprehensive list on where your brake light switch, stop lamp switch, brake pressure switch, pedal angle sensor are all located.
model chassis location
CLA W117 switch under dash
CLA W118 switch under dash, hybrids have sensor on pedal
E W124 switch under dash
SEL-SEC-SDL W126 switch under dash
SL R129 switch under dash
S W140 switch under dash
GLA W156 switch under dash
ML W163 2 pressure switches on master cylinder AND stop lamp/cruise control switch up to production 08/02 then 1 pressure switch on master cylinder
ML/GL W/X164 pressure switch on master cylinder
ML/MLE/GL/GLS W/X166 switch under dash
GLE/GLS W/X167 switch under dash
SLK R170 switch under dash
SLK R171 pressure switch on master cylinder
SLK R172 switch under dash
A-Class W176 switch under dash
A-Class W177 switch under dash unless hybrid, sensor on pedal under dash
AMG GT 190 switch under dash
SLS AMG 197 switch under dash
SLR 199 switch under dash and pedal sensor near master cylinder
C-class W202 switch under dash
C-class W203 2 switches on master cylinder and 1 Switch under dash up to build date 07/01. 1 switch on master cylinder as of 08/01
C-class/GLK W/X204 switch under dash
C-class W205 switch under dash, hybrids have sensor on pedal
E-coupe W207 switch under dash
CLK W208 Switch under dash with ASR- 1 pressure switch and brake switch with ESP
CLK W209 pressure switch on master cylinder
E-Class W210 switch under dash
E-Class W211 sbc has switch under dash and pedal sensor on master cylinder-ABR has switch under dash
E-Class W212 switch under dash, hybrids have sensor on pedal as well
E-Class W213
CL W215 switch under dash and pressure switch on master cylinder
CL W216 switch with basic esp, pressure sensor inside esp module with high end esp
S-coupe W217 switch under dash, or pedal sensor if hybrid
CLS W218 switch under dash
CLS W219 sbc has switch under dash and pedal sensor on master cylinder- ABR has switch under dash
S-Class W220 pressure sensor and stop light switch
S-Class W221 stop lamp switch with basic esp- pressure sensor integrated into the hydraulic unit with high end esp
S-Class W222 switch under dash-hybrids have pedal value sensor under dash
SL R230 switch under dash and position sensor on master cylinder
SL R231 switch under dash
E-class W238 switch under dash and pressure sensor built into hydraulic unit
Maybach W240 switch under the dash and pedal sensor on brake pedal
B-CLASS W242 switch under dash
W246 switch under dash
GLA-GLB W247 pedal angle sensor for hybrid- switch under dash normal
R-class W251 pressure switch on master cylinder
CLS W257 switch under dash- pedal sensor with hybrid
GLE X292 switch under dash
EQC X293 pedal angle sensor
Smart 451 switch under dash
Smart 453 brake vacuum switch on booster
G-wagon 463 pressure switch on master cylinder and stop lamp switch depending on year- too many variations
GLC-class x253 stop lamp switch under dash
AMG GT x290 switch under dash, or pedal sensor if hybrid

[@jdub2093]

Great video and thank you soooo much for telling the locations for all the models in the description. Somebody needs to put you in for a pay raise!!!

[@6minutemedia543]

The man talks sense ....it's really that simple. Thanks for your willingness to share your knowlege.

[@MasterTechLou]

Thank you!

[@stanheston415]

Outstanding information I've been trying to find the brake light switch under the dash four hours, I give up but after watching your video I will look under the hood for the brake pressure sensor and your list of locations on your models. Thanks for sharing your knowledge. Best regards Stan

[@mikeslack1450]

Hi Lou, I have spent the last few days watching your videos and I just wanted to say thank-you for sharing your knowledge.. No doubt I will be in touch, keep up the great work! 👏😊

[@MasterTechLou]

Thank you so much!

[@markstanalajczo3677]

Thanks Lou! Your explanation on a brake light switch vs brake pressure switch and the location helped me tremendously! I have a 2002 C32 AMG that I thought was having a brake light switch problem (vehicle wouldn’t start or move out of gear). Turned out by understanding what you showed, I found it NOT to be the pressure switch (as you explained that some models had no brake switch mounted anyplace…I was looking for it). It turned out to be a bad relay in position K…not the starter relay… So thanks again for the awesome video…. Much appreciated!

[@MasterTechLou]

Glad to help! and thanks for not asking me for a location when I clearly explain in the video its only in 1 of 2 places and in the description I literally list every single model and its location, for that I appreciate you ♥. I take time out of my day to try and help those that need proper info, and it gets frustrating when I get asked questions that I literally explain in the video. ESPECIALLY when its on the exact same model in the video!!!!!! sometimes I want to cry....... haha. thanks for commenting and glad I could assist in some way shape or form. FYI a brake switch will never stop a car from starting, UNLESS you are trying to use the push button keyless go feature as it needs the switch to be recognized. but other than that, its not part of the starting system. Lou

[@darrenlangille2020]

Trying to find what I have in switches on a 2011 Mercedes Benz C350 4Matic Keep up the great work.

[@tomomofokeng9066]

thanx ☺️👍 I love how you explained the importance of diagnostic not assumption

[@MasterTechLou]

Its one of the biggest problems in the automotive world. Assumption and guessing.

[@jamesoconnor3017]

Thanks for your help and advice again mate ! 😎👍

[@billpowell-hq5xt]

thanks for the reply, i've been looking for a replacement shifter and maybe a new ecu for the engine start problem... the reason I checked out the brake switch was I did see brake light come on once at one point and googled it and saw a bad switch could cause it not to go out of park. anyway thanks again great video info.

[@chrishensley6745]

Good job and Thank you for the info. on the switch/sensor!

[@MasterTechLou]

Thank you!

[@hatemeg1340]

Couldn't leave without saying thank you 🙏 👍

[@nasryawang9124]

Thank you for this tip. I take it, if NO scanner, do not waste time replacing parts what is typically the cause. I opened up my W221 under the dash, and I realised it was way out of my league. Tq for your video and listing.

[@MasterTechLou]

Thank you for watching! Yes I never suggest to guess at the fix, I am Very consistent in making sure proper diagnosis is done first and foremost. Just putting parts on a car can add more issues . Thanks again!

[@ramiropruneda8483]

Hey Lou, I have a 2003 S600. I don't think I saw you list this model. I'm pretty certain I have a brake light switch since I purchased a new one from auto store. Also, I am currently trying to remove the piece of plastic to gain access to the pedal but can't seem to separate it from the dash. It appears to be clipped on but I don't want to be to rough with it. Do you have a tip to remove that piece to expost the wule pedal to get to the switch? I have removed the 5 screws already. Thanks.

[@dannyd.8753]

Thanks for sharing your knowledge

[@jamesmcguire9296]

Having that ESP/BAS dash warning code to take to shop. Car normal otherwise for a 2004 clk. Stop car. Turn off key. Turn back on, no warning. Starting with brake pressure switch now that I know its location. Checking wiring first. Thanks much for the detail I was looking for.

[@MasterTechLou]

Glad I could assist!

[@markstanalajczo3677]

You hit on something..people want to be spoon fed…even when you actually explain everything in your video. Those people probably shouldn’t be working on their own vehicles😂 The only reason I mentioned about the brake switch not allowing the vehicle to start was because so many others in other forums have said it did… And of course, mine doesn’t have a switch..which they also said it did. Your video was the only one I found that showed differently ..and you were the one that was right…which is why I wrote. Thanks again!

[@MasterTechLou]

20+ years at this, forums and assumptions are my enemy

[@wheelersgirl07]

I have an 08 c300. The brake light switch isn’t the part that’s not working. My brake lights stay on when the key is in the ignition. When wires are crossed that go into the switch the brake lights work. But when the wires go to the switch the brake lights stay on. Suggests?

[@sunnymoe6235]

Very nice thank you

[@user-ek1jc8ev9v]

hey I have a c250 its a 2013 where is mine at? my breaklights are staying on like I'm pushing the pedal 24/7 and I'm not but everything else works

[@lilpowerstrxp5453]

i have a 2002 c32 amg, do you know the locations of the brakelight switch? my car is stuck in park and will not crank

[@nemesiosabbebassi7185]

You are amazing bro, I have been watching your videos & you are great in what you doing

[@MasterTechLou]

Thank you so much 😊.

[@nemesiosabbebassi7185]

Hi Mr. Lou i really need help on my c class c 180 kompressor

[@MasterTechLou]

@@nemesiosabbebassi7185 you can find me on www.justanswer.com Lou Palomino

[@dcfgarage]

Nice video, man!

[@MasterTechLou]

Thank you sir!

[@MasterTechLou]

Subscribed to yours as well. I will give you a shout out next video.

[@dcfgarage]

@@MasterTechLou thanks!!!

[@cynthiacancino1155]

omg thank you !

[@Hattinchannel]

ASD light wont go in r129 was told it was under the dash but where exactly ? Thanks

[@eirikmadsen2537]

Hi, i hope you can help me out here. I have an 2001 w203 c class, and i have fault on abs, bas, esp, and epc. I have used the icarsoft that u used in the video. When i for example goes in to esp it says error. Its like i dosent get contact with it. Maybe the esp control module is in "sleep" and i have to go to a mercedes workshop to fix it. So if you have some advice that would be great.

[@MasterTechLou]

With 203 you have to choose the right year in the scanner. Also if you cannot communicate with esp then that is a symptom. Check other modules for codes with communication with esp. or your scanner may be bad.

[@0neTeam]

Hey! I have 2007 S550 (but in the door frame it says 12/05) and I'm having a hell of a time locating the brake lamp switch. On the pedal there's a mount for it but its just a wire hanging there. No switch. Is it under the hood. On the dash it says brake lamp switch because we can't get it to come out of park. Help!

[@Mrbrown5714]

thank you sir really help

[@benstarr9523]

Thanks for the video man! I have just bought a ml500 w164 Same issue. Where should I start?

[@Ren200Z_MotoringLife]

hello there in another subject , i just got a 04 clk500 was under the impression the auxiliary water pump stayed on after you turn off the engine for a few min like on a 99 ml430 (i also have) . did a little voltage test after engine was off and wire to the pump showed 10 volts but pump was off, tryed a test light and nothing . is it just for the heater on this models ? its a good system on the w163..

[@MasterTechLou]

Hello. It should only come on when you press the “rest” button when the ignition is just turned off . If memory serves me.

[@ndumisodlamini8865]

Thanks a lot I'm helped

[@williechang3500]

Hello, I have 2007 M B c230. The ESP light on. Per M B dealer, it is brake pressure sensor. However, changed it, it still on. What do I do now?

[@alikariem592]

Would a wheel speed sensor trigger this code?

[@lisaellis4673]

Thank you

[@andrewglennon9760]

Do you know where my brake light switch is located on my 2003 Mercedes S430? Thank you so very much!

[@hannesshalomstudio]

Hey Lou, ive got the same problem here. ML270CDI W163, Lost brakes lights at the back. Fuses all good, bulbs all good and no switch inside at the brake pedal. Which one of the switches on the booster is the pressure brake sensor?

[@MasterTechLou]

they both are. you either have 1 or 2 depending on the year, with it being non usa I dont have access to the diagrams.

[@mikehome9650]

Hi Lou, hope you can point me in a direction to solve a problem I have, a 2004 W203 no fault codes but cruise control became intermittent then stopped working brake switch is on the master cylinder, the speed limiter still works any ideas. Sorry to bother you with this, many thanks for your really informative videos and common sense best regards M

[@MasterTechLou]

Usually the switch fails. Need to use a scanner to check the data of the switch when using it. The data will Most likely be in the steering column module.

[@traviesocuevas3571]

Clk320 brake light work if I just barely touch it but won’t stay lite if I press all the way down they will turn off any ideas?

[@MasterTechLou]

Switch not adjusted or is bad.

[@anythingbutwhole2979]

Lou, I need your help. how do i get the brake pressure sensor in my 03 c240 when it's under the hood? there's no room for my hand. i have a turn signal that stays on in the rear and no lights. I've checked fuses, bulbs and the light plate. cant figure it out. please help

[@MasterTechLou]

master cylinder has to come off if you cannot get to the pressure switch also if you have a rear light staying on, then my money is on a bad rear sam (fuse box) as it is responsible for all the lighting and it most likely has water and corrosion present in the module or connections.

[@abdulwahidkhalid9310]

I have a 2005 c320 sports and ESP message came on momentarily and heavy to steer. Check for fault code but none is related to either brakes or steering. ( My car has a permanent check engine light for other issues). The momentarily ESP message came on twice now. My kids doesn’t want to drive this car now. Could it be the pressure sensor for something intermittent or is there another way to reset this.

[@MasterTechLou]

Hello. Codes dont have to be related to brakes or steering to cause an issue like this. Loss of communication will cause issues like this. All codes mean something if you know what to look for also it matters the “scanner” you are using.

[@mintech1000]

Hi, Lou. If you have a short circuit fault code and you are able to communicate with the module does that eliminate “ a bad module situation?” Thank you.

[@MasterTechLou]

No it does not. You can have a module make up fault codes. Its not common but it does happen. Either a module is not sending a signal out or not processing the signal back. And by signal I mean voltage. Which is when it’s important to diagnose. Is positive and or negative voltage coming out of the module for the circuit . Is it getting back to the module. We determine a module is bad when everything external tests fine. If that makes sense.

[@mintech1000]

@@MasterTechLou yes, it does. It is eliminating game( components one by one). Do not assume! Thank you.

[@chineduemma3510]

Hi Lou, Where can i find the switch in c280 2007 model.

[@avibm948]

Thanks for the video. I have a c240 w203 (2002). Launch Diagnostics shows c1200 stop lamp switch S9/1. Car shows intermittent BAS error on dashboard sometimes. No ESP. diagnostics of break stop lamp shows On off and off on after break press for N/O N/C. Esp sensors 1 and 2 shows 254 bar for break pressure 1 and 0 for 2 when nothing is pressed. When I press the break both show pressure and they show the same pressure. Do you think the break 1st pressure sensor is faulty because it shows 254 bars when nothing is pressed ? Also yaw rate sensor show fluctuations in deg value when Stationary

[@MasterTechLou]

Both should match so yes the sensor that shows pressure when not pressed is faulty

[@stanheston415]

The only issue for me, is finding where it is and what it looks like, 2006 SLK350? Thanks

[@LucasDecimus]

Could you tell me where my brakes switch is on a 2005 ,it as a pressure censor under the bonnet. like you said,cant see a brake switch near the pedals ?

[@MasterTechLou]

Yes on the master cylinder

[@billpowell-hq5xt]

Great video, having several intermittent problems with my 2005 clk500, there are no codes on the dash. 1. when stopping car goes only drive to nutral unless i turn off engine then will go into park 2. car won't after the above problem at times, put a jumper on the start relay and car starts but will not go out of park. 3. the above problems are all intermittent. I have a iCarsoft MB II and have one code P1856 comes up, could this also cause the car not to start? thanks bill

[@MasterTechLou]

Thanks! Well, I can’t diagnose in the comments but sounds like your shifter has failed.

[@dulauhdagame5827]

hey i have a 2002 mercedes s430 i can't communicate with the esp module would a faulty brake switch or pressure switch stop it from communicating completely?

[@MasterTechLou]

negative. power, ground, data line voltages are what you need to check.

[@londonhall4987]

Hey i have a 2000 c230 the brake lights on both sides are not working.. I’ve changed the bulbs and still no luck..

[@Blu3ben718]

Hey Lou, learned a ton from the video! I recently purchased a 2004 s500 with the only error code being a speed sensor ( PO500 vehicle speed sensor A). I believe this to be the cause of esp & abs malfunction signs on the dash. However my rear right break light just won’t turn off. Even after turning the light switch to “0” and turning off the car. The license lights weren’t turning off so i unscrewed them. This only started recently. I’ve bought a brand new battery and i think this was the culprit for my previous dead battery. The trunk lid also won’t close but the air attempts. Could this go along with the break lights?

[@Blu3ben718]

Any ideas going forward?

[@MasterTechLou]

First off, the scanner you are using is not good enough for mercedes. I can tell that by the code you gave me. Second, the rear sam most likely had water in it. It’s under the back seat, passenger side.

[@Blu3ben718]

@@MasterTechLou Update: The right rear brake light turned off on its own after a couple of hours? I slept through it haha i need to check this out ASAP with a computer, much love Lou!

[@MasterTechLou]

@@Blu3ben718 things dont fix themselves. Its always water under the back seat. Or failed rear sam. I advise physically checking it sooner than later. :)

[@Blu3ben718]

@@MasterTechLou no water... i just unplugged the switch. Problem solved for now.

[@joanahhudson4138]

I don't know if you read these...but I love you

[@MasterTechLou]

I read each and every one

[@user-cd9yx2ms8w]

have a cl 215 55amg... I know break light switch is gone.. but central dash switches are also not responsive..inc hazard warning switch... Do you think same issue?

[@MasterTechLou]

no not same issue

[@mohammedzohebshaikh2789]

Hi Lou , hopefully you can help me I bought a mercedese c class w203 2004 model petrol , the ESP light is on if you could tell me which scanner should I buy which can read the ESP code also the car runs fine it’s just the light on thanks for the brilliant videos tk care

[@MasterTechLou]

Icarsoft , vdiag, or xtool would all work.

[@Art-tk6fd]

I have a 2005 C55 AMG. Have been trying to find the brake light switch cuz MB tells me it has one but it has a solid plastic column surrounding brake pedal and I can't locate it. Does mine have a switch and sensor or just the sensor??

[@MasterTechLou]

If you watched the video I clearly explained this situation. Thank you.

[@g.j.wilson7686]

Where is brake light switch on 2008 550SL- thanks you're a life saver

[@MasterTechLou]

I had posted every single switch location in the description also I have stated if its not on the pedal its on the master cylinder,. only 2 options. :)

[@g.j.wilson7686]

Thank you. I found all your list. I do have a follow up question. If I have a bad brake light switch can it cause the car not to start with a Drive Authorization not authorized. My dash lights come on. Everything works but engine wont crank. ECM has no faults. I've had car scanned with Mucar900 (I agree crazy name) also scanned with Altel. I get drive Authorization refused. All my fault codes are almost all the same. ECM and TCM all come back no faults. I'm not a car mechanic. I'm a 73 year old retired teacher and I bought a 2008 550SL as my end of life dream car. In the 60's I could rebuild a 389 with 3 deuces. Today's cars are computers with wheels. I'm lost and my budget doesn't equate to Mercedes dealers repair. Thank you

[@g.j.wilson7686]

I would also like to add this. I've watched 100's of hours of KZbin and read 100's of pages of material. You by far have the best channel for novice to watch, listen and understand. I taught and coached for 43 years. I know a good teacher when I hear and see one.

[@MasterTechLou]

@@g.j.wilson7686 man that means a lot! I aim to help and educate. Eventually ill be able to add some entertainment however the biggest problem in the car world is assumptions and misinformation and misunderstandings of how things work. I am glad I can help any way shape or form!

[@okparasamson7984]

Hii Lou, what about the icarsoft i980 is it a good scanner also?. Thanks in Addy.

[@okparasamson7984]

Does it scan all the modules in Mercedes?

[@MasterTechLou]

its not a bad scanner, but may not fit all your needs. theres a fine line between just enough and not enough of a scan tool.

[@bobjim5177]

I have a 2018 cla45 amg 4matic coupe (model 117.352) that won't move out of park. The fault code that has come up is C40400 - implausible data were received from the electronic selector lever module. Can you please help me understand what this means and how I could fix this?

[@MasterTechLou]

Issue is with the shifter. Its not sending correct data.

[@patbaptiste9510]

On the ships I worked on, redundancy is used specifically for having a second system ready to be used, in the event that the other system fails. In this was, one system is always in operation - while the other remains idle or is being repaired or replaced. My guess is that this *MIGHT* be the reason this system is applied in automobiles breaking systems, since the brakes *IS* the most important system in a vehicle. I might be wrong but that's my guess - since that's why such systems are used on ships.

[@MasterTechLou]

That would make sense! That or for diagnosis purposes. Mercedes is pretty good with explaining how things work but we run into scenarios like this where they never released information why. Least I have yet to find it.

[@mandym7001]

My daughter has a 2003 C-230 Kompressor. Is there more than the brake lamp switch off the master cylinder. Have a broken e-brake, parasytic drain, car wont shift automatically, but can change gears manually. Had issues before the e-brake issue. Replaced brake lamp switch @ master cylinder. Looking to confirm whether or not theres a second switch. Thank you!

[@MasterTechLou]

Only 1 location. Either single or dual pressure switches in the master cylinder or brake switch on the pedal. Yours is on the master cylinder. Switches also dont affect shifting.

[@mandym7001]

Thank you! I believe it's the parasytic drain on the battery is causing the shifter to lock. Also found a bad fuse & suddenly its shifting again! Thank you so much! I was under the dash for days looking for that switch! Really appreciate the help. Got it changed out!

[@user-ht3et2oz4t]

if the brake light switch / pressure sensor is bad, will I get a malfunction light on the dash? My X166 GL550 2013 gets stuck in park and won't switch gears. It's intermitent. Doesn't happen all the time but is getting more common. Great vids! Thanks!

[@MasterTechLou]

Yes and no to the warning. Your issue is most likely a bad ISM. Have the dealer scan the car. Probably will find drive authorization codes like in my other no start video I made.

[@Mrjay762]

Not sure if u still answer but looking for feedback I have a 08 c300 the break lights come on as soon as i turn on the car and dont turn off, ive replaced the 7.5 fuse under the hood, and replaced the brake light switch *note*if im driving and shut off the car in neutral and turn it back on they shut off until i press the brake again then they stay on. Any idea what it might be, possible i bought a faulty sensor ?

[@MasterTechLou]

Shorted rear sam is most likely. But my video explains to use a scanner to check live data .

[@Mrjay762]

@@MasterTechLou wow appreciate the reply 👍🏼 and yeah great info but i don’t have a scanner and money is tight to buy one so going bit by bit haha hopefully something comes up

[@Mrjay762]

@@MasterTechLou you were right. Rear sam was wet from humidity took it off dried it off with a blow dryer, placed it back and it works now

[@hcouncilwilson8305]

Where do I find it on a GL450-2007?

[@TheLight7861]

2005 c220 CDI. trans bumpy shifts. Not shifting from D-N into R-P. And limo mode. It was in and off. Sometimes it’ll drive absolutely fine but more times than not now it clunks into certain gears and is in limp mode 😩

[@MasterTechLou]

Sorry to hear. As always youll need a mercedes scanner to check for codes. That will get you in the right direction.

[@Mrbrown5714]

04 c320 wagon do both horns has work for it to sound

[@WendyC-cg6gt]

If just you brake light switch was the only that came on the display but now the BAS,ESP, and left brake light then right and so on . Should I start with the brake light switch?

[@MasterTechLou]

If you wish but a brake light switch will not set dash warnings for bulbs. You will need to check the bulbs as well. And use a scanner to check for codes In the esp module.

[@WendyC-cg6gt]

Thank you! Which model code reader is best for my 03 c230 sport coupe super charged

[@MasterTechLou]

@@WendyC-cg6gt icarsoft is a good one or foxwell. Xtool works too the ip616 model

[@nays5056]

I have a 2003 ml500. My brake lights stay on while the car is on, but when I actually press the brake pedal - they go off. I have replaced the pressure sensor. Any ideas on what it could be??

[@MasterTechLou]

You need a scanner to check the live data and also a wiring diagram to confirm wiring is correct. I never ran into that before on this model.

[@sebastianvanh342]

Hey Lou. My esp light is on but when I connect my icarsoft it does not connect to ecu “fault in communication with vehicle ECU” 2004 c230 kompressor

[@MasterTechLou]

Hello, ok so, if you have a fault in communication, then that's the issue , esp may have blown a fuse or the module may be bad. check other modules codes, if you find a lot of codes to do with communication with the esp,. then that's telling you that the esp module is what you need to focus on, power, ground and data lines voltages. If all are present, then the module has failed.

[@sebastianvanh342]

@@MasterTechLou Thanks Lou. I checked the fuses and all fuses are good. Do you mean the ESP module in the engine compartment correct? Our previous mechanic told us it was the sterring angle sensor, and we changed that and now it says 'ESP not available' after replacing it too on the dash

[@MasterTechLou]

@@sebastianvanh342 correct esp module in engine bay fuse box. If memory serves.

[@markusfarmer1686]

Have a 2003 ml500 with stuck blend door Actuator (heat just flows through won’t switch to defrost or change vents) to it in they B’s me said they changed blower motor in center console lol I have already changed dash blower/heat resistor fuse relays looks hard to reach blend door in dash through glove box be great to see a video from you

[@markusfarmer1686]

Please help some summer here and no a/c just heat seeping out through vents with oil exhaust mix smell sign hot ass black Mercedes lol

[@johnlegbara4300]

Please what scanner would you recommend to scan the whole system?

[@johnlegbara4300]

C320

[@MasterTechLou]

Please check my other videos regarding scanners, thanks.

[@ivananderson8679]

06/07 clk 350 brake lights aren't all working, replaced bulbs... not sure what to do next.

[@MasterTechLou]

possible burnt tabs on the bulb holder and or taillight plate.

[@marcoverdi8998]

Hi thank you so much for helping us i have 2006 Mercedes clk 500 i dont know if its w208 or w209 i find pressure sensor i couldn’t find the switch i dont even know if i have one its giving me a problem shifter got stuck in drive and it was only moving to neutral and drive. I couldn’t bring it to park or reverse. Then I realize it if I let go of the break it start operating. I couldn’t even turn off the engine because screen was telling me. My car is not parked mode. I choke the engine cutting off the air. That’s how I turn off my engine then I disconnect the battery. Wait for one minute I reconnected everything went back to normal. Could you please help me Thank you Have a good day.

[@stewarthibbitt5464]

Do you know the location of the brake pressure switch on a 2005 slk55 amg and if there is 1 or 2

[@MasterTechLou]

It’s in the description 😀

[@elevateproduction2697]

I have a 2004 slk 230 the problem that I have is my break light is on and when I drive it start beeping when I stop it stops beeping any idea what it can be

[@MasterTechLou]

Parking brake pedal is pressed , parking brake switch is stuck or low brake fluid are first things that come to mind.

[@sgonza4620]

Hi, I have a 2012 C250 W204. I just replaced the steering column on it and as I was doing so the wires from the brake switch slipped out, I have no idea as to why it happened. I just ordered a new connector to fix the issue but I can’t find anything showing the correct location for each wire. Do you have a wire color and pin assignment diagram? Thanks in advance.

[@MasterTechLou]

So sorry I dont know why I didnt see this comment before. pin 1 pink with blue stripe pin 2 pink with white stripe pin 3 black pin 4 pink with green stripe. I hope this helps.

[@sgonza4620]

@@MasterTechLou, thank you. I was able to find it. Appreciate it.

[@MasterTechLou]

@@sgonza4620 So sorry, not sure why some comments I get emails for, some I do not. My apologies. Glad you got it taken care of.

[@sgonza4620]

@@MasterTechLou, thank you. I’m sure I will need your vast experience again. 👍

[@zoe-wm4bb]

Where is this switch on 2008 Mercedes benz GL 450?

[@TheGuitarPlayerGuy]

Do you know where it’s at and type for a 2006 C230 sport?

[@MasterTechLou]

I typed out every make and model in the comments and the video is of the exact same car. the video shows exactly where its at. Thanks

[@mikeberish3941]

2003 ML 350 no Break sensor behind the pedal no wiring also where is it. I guess it's under the hood.

[@johnpaschal6245]

2007 s550 no brake light and car won't start no warning light came on before problem Help

[@johnpaschal6245]

Hey what about 2007 s550

[@krystianswinson9758]

I change my MAF on my c280 2007 and now my abs/esp light is on. Should I change my brake light switch? Thanks for the awesome videos

[@MasterTechLou]

Never ever ever just change a part. Scan codes. That is the first step. And thanks for the compliments ❤️

[@currentaffairsrealism]

Hi, thanks for the video. I have a 2011 450 GL that won't select any gears. It's stuck in Park. Can it be from a faulty brake switch? An ESP fault is displayed.. If the brake pressuresensor/switch are faulty, will the brake lights work?

[@MasterTechLou]

Communication failure or bad ism or bad trans. Most times its water in the central gateway. But thats thinking out loud, heres a test if you press the shifter and it says “press brake” that means communication is good. And possibly a brake switch or fluid issue with brakes. A broken brake line will lose pressure so you cant shift.

[@currentaffairsrealism]

@@MasterTechLou Thanks But I'll like to know if I can use the brake lights to determine whether the switch or pressure sensor is faulty or not.

[@MasterTechLou]

@@currentaffairsrealism scanner is the only way to be accurate.

[@sophiebliss8840]

Please help!! I have 2006 ml500 and it’s not on ur list, my vehicles in pieces… I can’t find where the Stoplamp Switch - Mercedes-Benz (001-545-64-09) is. My car won’t shift out of park, and the car warning says it’s not even in park.

[@MasterTechLou]

Hello, it is on my list. Your model is a W164. Its a pressure switch on the master cylinder. Also if your dash doesnt show P, you have a communication error. A brake lamp switch is not your issue.

[@user-tk4bi1bt2w]

Hey Lou. I have a 2001 w203. 270 cdi. It has no power. My icarsoft scanner say there is a can bus fault. Nothing on display. When i start its it has power for ca. 20 sek. So the exhaust sound change to a deeper roumblen, and power is gone, max 3000 rpm. Scanner also said that flow in ecv system is to low. Please help me with a good advice

[@MasterTechLou]

Sorry I cant help with a diesel this old

[@user-tk4bi1bt2w]

@@MasterTechLou okay. But can you maybe tell mee something about that can bus signal?

[@MasterTechLou]

@@user-tk4bi1bt2w no I cannot because that can mean anything

[@emiljanocakalli1778]

hi, i have a c180 w203 and is not starting. Can a brake light switch do that?

[@MasterTechLou]

A brake light switch has no effect on starting, ONLY in the push button start models which yours is not.

[@dawnmieles5616]

Hey.. so I have a 2011 GL450 I didnt see where u posted the location of the brake light switch?? Also curious on what fuse box the fuses for it is I cannot find my manual. Thank u in advance

[@MasterTechLou]

Your chassis is a X164 and there is no fuse for it. Also in the video I state theres only two places it will be. On the brake pedal arm, or on the master cylinder. On yours its on the master cylinder.

[@dawnmieles5616]

@@MasterTechLou Thank u for your response much appreciated.I actually figured that's where it was. U mentioned maybe 2 if them but I think mine only has one a pressure sensor I think that's what u called it.

[@MasterTechLou]

@@dawnmieles5616 yours may have 2 of them and yes pressure switch/sensors

[@dawnmieles5616]

@@MasterTechLou so I got one out it's black with a spring thing in the end and I've been trying to figure out the part number but now there's 2 wth... Ugh 😩 and how do u test them ? Cuz the spring one had 1 rusty clip.

[@MasterTechLou]

@@dawnmieles5616 Hi Dawn, best I can say is, the two round metal switch/sensors screw into the master cylinder. You can only test them with reading the live data with the scanner like I show in the video.

[@topaz3818]

Where is the brake pressure sensor for a 2002 Mercedes C230.

[@leem1337]

I have the problem of my brake lights staying on while car is started, WITHOUT foot on the pedal.. INNOVA scanner reads switch plausible replaced with two different switches same issue.. 2006 S430 4MATIC

[@MasterTechLou]

Rear sam most likely has water In it.

[@stuartcoffen9858]

Hi I have a 320 ML 2008 m0odel and my break lights won't turn off - can you help?

[@MasterTechLou]

You most likely have water in your rear sam

[@lisaellis4673]

I have an s350 06 i just changed the brk light and still no stp light in the back window on dash it say s fog light out on dash

[@lisaellis4673]

BRK light switch

[@dablade.rahmon8248]

I have an 02 call 430 and I’m having this problem

[@dipzb261]

Bro I have a Mercedes w203 c200 kompressor.. basically when I drive sometimes I get the esp sign pop up but nothing happens and it goes away when the car restarts which is fine. Sometimes when I drive the yellow triangle pops up and I hear a loud grinding sound, I thought it might be the brake light switch but I couldn’t find it under the dash :( any help or advice??????

[@MasterTechLou]

Your traction control is activating. You need a mercedes capable scanner and a competent tech to read the wheel speeds to see why its kicking on. Most likely yaw sensor. As for the brake light switch, I literally show the only 2 places a switch is. And then I put in the description where every switch is located for every car.

[@dipzb261]

@@MasterTechLou thanks, I will try and find someone with a scanner or else probably just change out the switch on the master cilinder just for safety. Is there anyway I can disable traction control? To stop this from happening ?

[@zaidenwolfestrratton6542]

hey man,i dont know how to ezpress in words whats happening with my rear lights on my clk 500 2003,its fing funky

[@MasterTechLou]

rear light issues are controlled by the rear sam, and on your model its either a bad sam or poor connections at the bulb sockets.

[@arturoramirez4263]

hello, my problem is every time I push the breaks, the right side burns the light, I replace the bulb carrier on that side and the problem remains, The reason I replaced it due to a burned contact. Any ideas please let me know. Thank you.

[@MasterTechLou]

Thanks for reaching out to me, unfortunately Theres not enough information in your statement to be able to help you. If you need help you can reach me at my website www.cartechconnect.com thanks

[@yatesc9246]

Is there a more technical name for the brake light switch part? Searching for brake light switch through MB OEM parts lists and I can't locate anything with that name for my GLK350 X204? Took your advice and bought an iCarsoft scanner. I didn't get any codes related to the brake light switch...the scanner read the following 2 codes: P061A and C0034. After a quick google search I got nothing on the P code but did find ABS wheel speed sensor for the C code. What initially brought me to your video was because the ABS, Check Engine and ESP (ESC) dash lights came on simultaneously and the car wouldn't accelerate properly at speeds above 55mph. Im thinking I have 2 distinct issues here. Any advice on either issue would be appreciated.

[@MasterTechLou]

Stop lamp switch if on pedal (not your car) brake pressure switch if on master cylinder (your car).

[@MasterTechLou]

Erase both codes. Drive until error occurs. Then diagnose from the codes that return.

[@yatesc9246]

@@MasterTechLou Erased codes. No dash lights when started. Drove the GLK, same dash lights came on within a 100ft of driving. Code read C0034: right front axle wheel speed sensor. I drove the car again, this time hard accelerating from a stop and it went in to limp mode. Read codes again with the scanner, same C0034 and now P061A. Couldn't find much information on the P code. Would a faulty wheel speed sensor trigger limp mode?

[@MasterTechLou]

@@yatesc9246 yep, wheel speed sensor is likely culprit

[@yatesc9246]

@@MasterTechLou Replaced the front right ABS sensor. Cleared all the codes again. Drove the vehicle. No dash lights, no check engine light and no limp mode after hard acceleration. Everything seems to be working as it should. Thanks for the great video and thanks for the advice.

[@afg599]

But I still can’t find my break purser sensor for ml 350 /2003 it’s not under break puddle it’s only middle break is working without break switch lol

[@Patzimaro21]

Hello, I have a 2010 Mercedes c300 automatic. My car is stuck in Park after I first start it in the morning. After about 20 minutes or so idling, the shifter starts working just fine. I have no check engine lights whatsoever…any help would be appreciated! Thanks

[@geovannicstillo]

Did you find a solution ? I’m having the same problem right now with the same car

[@Patzimaro21]

@@geovannicstillo My mechanic took apart the sfhifter & said there was small debris…he cleaned it out & it only worked for a couple days. No solution yet. Have you found the issue? Thanks

[@samuelking7669]

Slk280 can’t find brake light switch, slk280 is not in your list?

[@MasterTechLou]

In the video, I clearly state. Its either on the brake pedal or its on the master cylinder. Only 2 places they are located.

[@DEPTHTALKSINC]

Hey so my Mercedes Benz c300 brake light won’t turn off. Even when it’s in park, So I’m guessing it’s an electrical issue? Question is how do I turn it off?

[@MasterTechLou]

Hello, first make sure headlight switch is set to auto or O if you turn it too far left the lights will stay on. If the switch is set properly then you most likely have bad rear fuse box and the only way to turn it off is to disconnect the battery until you can get it fixed. Unless its not all 3 lights but just 1 light then you can unplug that tail light housing connector. Save the battery from dying.

[@kelbej1]

What about the 2005 SLK55 AMG

[@CrucialSpeaks]

Great info. But when I test ESP everything works with depressing the brake, and I do still have ESP error, AND the brake lights stay on when ignition is on, they wont even turn off with the sds??? WTF?!

[@MasterTechLou]

The answer is right in front of you. If the scanner cant turn the lights off then you have a bad rear sam…….

[@MasterTechLou]

Depending on the car you are working on.

[@somathilakeBwm]

why EPC warning light also fuel pump start and stop suddenly .mercedes w203. What will be the issue ?

[@MasterTechLou]

Sorry I cannot answer that. Too many possibilities as to what is happening to your car. You need to have a Mercedes mechanic scan it with a Mercedes scanner to know what the issue is being caused by and diagnose from there. Sorry! I wish I could help but theres so much missing information. Best of luck. Lou

[@somathilakeBwm]

@@MasterTechLou changed 4 plugs and cleaned injectors. Changed accelator padel. Can you now diaognose please .all fuses and Relays in order.

[@MasterTechLou]

@@somathilakeBwm no im sorry

[@christophergonzalez28]

I’m looking for the brake light switch in a 03 c230

[@MasterTechLou]

Then you will find it if you watched the video, thats literally the same car. Plus I described every cars location in the description of the video. I hope this helps.

[@alanmacapagal6879]

Master Lou... Good day... what is a good email for you. would like to know where and what type of brake system i have on my 2007 Mercedes slk280. looked under the dash and the brake switch it not there. appreciate your assistance

[@MasterTechLou]

My friend I took great time and detail to list every location in the comments. Thank you.