Replacing HVAC Stepper Motor on a 2002 Mercedes-Benz C240 (W203)

[@MmetalbikesS]

Your conclusion is absolutely correct. Often times it is actually a crack at the hex key of the control arm that causes the motor to slip/skip , and not the stepper motor itself. Thats the reason why mercedes reworked the design of the control arm two times, each time adding more material around the hex key to keep it from cracking/flexing.

[@martin661962]

Thanks so much for this video. I replaced the arm that moves the flap to direct air to the windscreen, when the defrost button is selected. The arm was cracked where it fits to the stepper motor. Fortunately, the replacement was a tight fit on the stepper motor cog. It fixed the issue immediately and the annoying 'eight clicks' from the dash each time I started the car, has gone. For anyone completing this job, when reinstalling the centre console, make sure all wiring plugs have sufficient length and will reach where they need to plug in. Otherwise you will be repeatedly installing and uninstalling the console til you get the wiring all hooked up.

[@DanielRaic]

I had this same problem like it is on video. I changed stepper motor and it was ok. The thing is that I can hear now sound of tightening each time when I press to direct air toward windscreen. I heard this also before, before my old stepper motor went bad. I removed again everything to check what is happening, stepper motor is working fine, arm is ok, but little part which arm pushs toward up when air is directing toward windscreen is moving really hard and slow...This is reason why my stepper motor went bed in the first, all parts inside of it are plastic and it could not endure so much effort.. Do you maybe know what I should do to fix this? I wa thinking maybe its just some dust collected and that thing which is oppening air toward windscreen (some kind of doors or whatever) needs cleaning, but how to reach that part..I was searching online but couldnt find anyone cleaning that or removing parts toward it..

[@mikevasquez8270]

Thank you for posting this video. Your patience and wisdom on troubleshooting the problem after installing the new part (and the idea of using the original part bevause it was a better fit) was fantastic. I applaud you on the way you described the problem and how it affected the design. I also respect you for reading the comments and how you reply to each one. You are truly a very smart and gifted man. The way you tested the install and how ít failed, and your approach to trying to solve the issue ueing the silicone grease was a good idea. It was interesting to hear and see how you diagnosed the issue. Thanks again my friend.

[@EvilestMinion]

Did you write this with an LLM geez. So lengthy unnecessarily. It's interesting we're all finding this video now. This issue just arose in my car. Let me know how your replacement goes.

[@davidb.cutter4631]

So the car salesman told me, "It's only a $20 part," unfortunately, he didn't mention the complexities in changing it out. Great video, I don't know if I have that much patience. Guess we'll find out.

[@ivaylo.minkov]

This definitely goes to my Car playlist. Altho mine is C 270 facelift (2004) I guess it won't be much different. It made me realize this need to be done in summer (more light and warmth). Thanks for the great video.

[@NK1794]

Thank you for watching and good luck.

[@Noammats]

LOL, someone needs to parody this, like at the end the guy just sits on a pile of scrap metal and calmly says "well now you know what to do, just reverse everything you did to put it together" :D

[@roidorerez]

Thank you very much for the video. A lot of respect for your patience and professionalism

[@NK1794]

Thank you, sir

[@Luisoft1965]

Thank you so much for this video. I helped me a lot to realize that it had to be done by a mechanic.

[@richarddelaney4356]

Does any one know a good mechanic in Dublin to replace my stepper motor on my C180 mercedes 2003.

[@stanevus]

How much did they charge you?

[@colintreacy3899]

A fantastic video! Your notes are excellent. A true professional. Cheers

[@NK1794]

Thank you. I appreciated the comment.

[@bigl90larry]

Thanks, I just got replaced 2 motors last week. It is a lot of work to get this done. But worth it

[@javoncook2441]

I appreciate you showing this video. You should put up a donations link or something. Thank you very much.

[@Xzx-l4u]

Excellent instructions. Good on you mate. Pleasure to watch and listen.

[@ae70gts]

so nice of you to show step by step. thanks!!!

[@machoneboard]

Thank you for taking the time to post this video. Very helpful. A common problem I think.

[@robincornick9010]

man you are a warrior, I love your endurance, got to be the best feeling ever when it finally works. About to sell my C240wagon as I bought a E350wagon. Was gearing up to do this n the 240 but I'll drop the price 500 and let the new owner have the fun!!!

[@omarouyahia8087]

Thank you man, you took too much in your time for this tuto. Thank you

[@stephenchalkley7848]

I just bought a C240 now I know what that noise is great job

[@NK1794]

Stephen Chalkley Thanks!

[@nigelramsay7898]

Excellent! My 270CLK just started doing this after only 242000miles! ;-)

[@NK1794]

Thanks! That's a lot of miles!

[@sergiovega7769]

Thank you so much man you help me a lot with your video I got the same problem on my car am going to fixed tomorrow morning

[@starabagraxD]

You did such a great job with everything well explained. Thank You!

[@NK1794]

Appreciate the comment. Thx

[@doozer2726]

Excellent video mate, thanks a lot. I've already done this about 2 years ago, but forgot how to do it, & it's gone again! Good info about the oem part too. Cheers 👍

[@rafaelbernal3473]

You're so brave for doing this man!

[@maurozarate371]

Gracias amigo por tan buena asesoría y paciencia, para explicar cómo se debe de hacer. Exelente trabajo

[@thecovenant825]

Thank you, great video, you have the patience of a Saint!

[@djhookflores7369]

Nice vid my man, thank you. How many hrs you estimate this job took you?

[@georgelast9991]

this info is for someone who is watching this video and is going to attempt to do this. The arm that comes off of this actuator is like timing on a car it must be put on exactly how it was taken off and if you turn the key and put power to it while the arm was off you just threw it off timing. So if you get clicking that's probably why. Does anyone know what vent this actuator opens and closes?

[@daveshave-illbeback6646]

This is a big job! Thanks for sharing 🤓

[@HinduBrotherss]

Can you please explain what is the function of this stepper motor and control arm. does it control flow of air to different ports or it controls temperature???? Mine C200 does not blow cold air while compressor is working absolutely fine, gas is fully charged. My HVAC system keeps on circulating with cold and hot air. I am unable to figure out the issue.

[@SavedbyHim]

What would happen if you just unplug the stepper with the issue?

[@dja29780]

Très bon travail. Merci pour ta vidéo. Problème récurent sur Mercedes. Hélas

[@SaabCarlsson]

Thank you so much for this. I have a right hand drive, so could be a bit different. But it's a great help. Much appreciated.

[@SavedbyHim]

Hi Chris. have you tackled this job yet? :O

[@SaabCarlsson]

Hi Graham, No not yet because I found out that the main problem wasn't only the stepper motor but the middle vent was stuck open so all the air was escaping upwards. I managed to source a second hand one from Latvia at a great price and at least now the center aircon vents are working. Also it's winter here in Perth so I'm not in such a rush. Also a few other plastic fittings are broken due to UV deterioration (eg door grab handles) and some other dashboard stuff, so I'm getting as much of that done before tackling the job. I also have the common leak under the oil filter which I need to do. I hate it leaking oil on my garage floor. Thanks anyway. Cheers Chris

[@SavedbyHim]

@@SaabCarlsson Thanks for the reply! My HVAC fan is chirping every now and then so I might replace that when doing this job (mine is clicking behind the dash as well). I have the same oil leak but I'll be doing that with the valve cover gaskets. Best of luck from South Africa!

[@SerQtn]

Thanks so much for sharing. So helpfully. Greetings from Argentina.

[@ivanpetrov8433]

Thanks for the video, , very useful information.

[@johnh9200]

Anyone that gets ticked off (pun intended) by the stepper motor ticking for 15 seconds, needs to watch this to realize that there are far worse things in life to concern yourself with. I reckon that by the time I got half way, the floor would be littered with the ends of broken clips, that were mounting with each new task that I came across. Talking about going down a rabbit hole.

[@LokeJohansen]

Great video, ive got a B15A8 error. and your video just saved my day. ;)

[@kaidiego]

patience paying off, at it's finest!

[@NK1794]

LOL. Thanks

[@JJagermasterr]

Great video! I have an 02 C240 too. Wonder if you ever experience heat in footwell seeping in through central console driver’s side when driving?

[@ceciliaperalta7781]

Very helpful! Many thanks for this!

[@tserevenad]

when replacing a stepper and/or plastic arm, how to you ensure that the flap/door is positioned correctly? I just did this job and air not blowing of appropriate vents, so I must have alignment/positioning off.

[@EYEMYOU2]

Try to do a ac rest google ac rest

[@DaytonaDan-bi2wb]

@@EYEMYOU2 Good call

[@fatihsultan6452]

Thank you very much for your time and hard work 👍🏻👍🏻👍🏻

[@williamsmothers8830]

Well, I know what I am in for now. Thanks for the wonderful detailed video.

[@allanclell]

What a bastard of a job for what’s actually a small problem to fix. Getting to it is a whole different matter 🤔👍

[@radmansa5514]

Good video, clear instructions 👍👍👍

[@nacho5oh867]

That job would cost an arm and a leg at a dealership, well done friend!! 👍🏽

[@nasirmehmood6049]

Sir what is the function of blue button located between the center vents

[@glob-o-tech]

thats not a button, but a dial that controls the fresh air flap. older mercedes used to do only fresh (direct) air in the middle, on these you can decide if you want tempered, fresh, or both (dials on the sides)

[@Caprica-Approaches]

Amazingly helpful, thank you! I'm quoted about $1k for repairing this - yikes, but you show clearly nothing is extremely simple to do so :-)

[@ReVersDC]

to get defroster motor is a pain in the ass... i give up today

[@albert279]

Hi, I have a 2000 c240 W203 with the clicking sound and I watched and enjoyed your video. Question I have is I wonder if I can follow you when my car is right hand drive? All the video's are for l/h/d. I hope, because the controls are all in the centre, then they would all be the same with respect to the bulky, shaped pieces bolted up to the firewall. Too expensive to have two systems. right?

[@NK1794]

Hi, I believe everything should be mirror image. Good luck.

[@albert279]

Hi, Albert again. I removed the total glove box area, really easy, and saw the stepper motor so often seen in these discussions..On RHD cars it sits there easy to remove but it's not the one making the clicking. That's coming from above the fanhousing; looks like that will have to come out as it can't be seen. I'll come back with news.

[@NK1794]

Any luck?

[@albert279]

OK. Pulled all the dash apart, following your good example and the fact that it's R/H/D is all familiar to me now. Whilst mine is a 2000 it was produced late that year so it has all the 2001 bits. Something I'd not noticed before is that there's no heat to the interior. I pressed the two buttons on the Climate panel and it cycles through time and again, doesn't stop. The stepper making the clicking is the one on top closest to the windscreen; by the way one has to remove the top cover for the dash to see it. The diagrams say it is related to a carbon filter but this car is not fitted with a filter. Anyway, as it cycles through it briefly actives the two motors that direct the heat downwards-----you were working in that area in your video; all the other steppers that one can see are working too. There is heat briefly showing that there's no shortage of hot water.I used a medium length screwdriver and carefully prised away the cable of the clicking stepper so it was disconnected and the cycling went on as before so maybe it not working is the reason there's no heat. To replace that one means the frame for the dash has to come out. I'm going to order that stepper before I pull yet more of it to pieces.Do you know where I can buy one at the right price?By the way, one does not need to remove the steering wheel.

[@NK1794]

How's going with the repair? You can get parts from Ebay. I bought stuff from Pelican Parts also. www.pelicanparts.com/Porsche/index-SC.htm?gclid=EAIaIQobChMI5Iu9tOSF4AIVshx9Ch03WQz4EAAYASAAEgIln_D_BwE

[@leslieldridz1731]

I had the same problem...I bought that little motor...when i took the panel off,i saw that the right motor was broken...Are the left and right motor the same?Can i put the left motor on the right side?thanks

[@1967250s]

So, the actual problem seems to be the flap or lever at the top is binding up in the housing up top, and causing this problem? Replacing the motor just fixes the clicking, not the actual root problem? I have a 2001 C240 with this.

[@dco122]

This is like winning an escape room

[@NK1794]

D CO 😁👍

[@thanhson7630]

Excellent Video, Very detailed, Like your hook tool

[@NK1794]

Thanks

[@DaytonaDan-bi2wb]

I have one and it works, not clicking but the motor kind of makes a grinding noise when you turn the key on .Question: If you never turn the air switch and just leave it in all ,will it stay there even after the stepper motor goes out ? Because I'm not touching it anymore and if it goes out I can live with the air being on all vents permanently rather than having to tear the dash apart to get to it and replace it

[@eddt6485]

One more like form me This information is really good thanks

[@NK1794]

Thank you, sir.

[@somathilakeBwm]

please give me an advise .i put new blower and resistor after old part blown.now i cant connect my bew blower .it runs same speed even the key is off.what would be the problem ?

[@1967250s]

Sounds like the relay is stuck on. May be the fan switch, but more likely the relay.

[@tjeerdsnip2442]

This will help me a lot! On my 200 C

[@CryptoMaxi555]

Thank you for sharing ! Great Job!

[@NK1794]

Thank you, sir!

[@wildwall]

Do you need the radio code when you put it back in?

[@Fatkidlovecake]

How much would a dealership cost to repair this ? I have the same problem top right side is making same noise

[@Fatkidlovecake]

Also I'm only at 112000km with this problem, bad control arms don't know which ones, no e break, and front seat fuse has to be removed or it drains the battery, horrible cars wouldn't recommend

[@NK1794]

@@Fatkidlovecake Sorry to hear about all your issues. I have no idea how much the dealership would charge for doing the repair. Its a common problem so maybe they can give you a rough estimate over the phone.

[@abdulrahimabelashher5210]

thanks for your effort on the video and i got a question is this the motor responsible for the air going down the foot area ?

[@34steve1]

19.30 can you remove a fuse to cut power off to the unit

[@ราตรีอิสานยูเค]

สวัสดีจ้าคุณเจี้ยบ🙏😁 เก่งจริงๆ แก้ได้ทุกจุด เหมือนคุณหมอเลย 👏👏👏👍👍👍👍

[@NK1794]

ราตรี กินแซ้บ พอซ่อมได้ครับ ขอบคุณครับ

[@jorgeleiriao5634]

I have a 2004 c200 that’s doing the same thing. My car is right hand drive . Do think I’ll be able to get to it by just removing the glove box ?

[@rogernemos795]

I heard MB changed the design of those motors, but the cost to replace them is tremendous. For space to work in there it is necessary to disassemble the black frame behind the panels. Good job. Big job, i did nt make it to undo the ftrame, so i went to tbe dealership.

[@MrArtSkyStudio]

Thank you very much man, this is really helpful.

[@NK1794]

Thanks. Appreciate your comment.

[@mbiker7]

Will this fix my defrost vents facing the windshield? I’m not getting any air out of the vents facing the windshield. My windshield is fogging up during a hard rain.

[@jonasbgolf]

What direction didn't it want to blow air, when you changed the stepper motor?

[@NK1794]

jonasbgolf Sorry, I didnt actually see the flap so I’m not sure in which position it was stuck on.

[@victorking1459]

How did you remove the white radio bracket?

[@albanyyy9911]

Does the a/c work if that is broken??

[@NK1794]

A R M I N Yes, the AC works.

[@albanyyy9911]

Thank you!

[@popila6747]

Any advice on how to replace the HVAC blend door for 2004 Mercedes E500?

[@NK1794]

So sorry, I don't have any advice on that.

[@2404Pepe]

Can't thank you enough!!!!! great job!!!!!

[@sma72ly98]

Hey buddy, my foot flap always open even its closed. Is that the reason!

[@johneraygonzales2172]

U did a good job bud. That is also a problem with my c230

[@SidewaysGts]

Awesome video! If you catch this and dont mind me asking- Do you recall roughly how long this took you to do start to finish?

[@MrMctwisted]

Looks like about 400hrs of frustrating work. Maybe more. I’m about to do mine. What a nuisance

[@SidewaysGts]

@@MrMctwisted Good luck man! Genuine request- if/when you finish it please let me know how it went. ive got a family member who wants me to do it for them and im leery to undertake it.

[@MrMctwisted]

SidewaysGts it doesn’t look as bad as I thought it would. I shall let you know how much rage it caused me haha. This guys video will be a tremendous help!

[@SidewaysGts]

@@MrMctwisted Please do and thank you so much!

[@54V4]

Great job mate! Good informative video. Thx for sharing it with us!

[@NK1794]

Thank you for watching

[@nykeia_candoitall1498]

great job and great video

[@bettabegoodjr2104]

How much does a job like this cost?

[@Rick_Celma]

Great work sir 👍

[@allanclell]

Im wondering if there’s any more things that could use pre emptive maintenance while ive got all this shit apart. While in there

[@gameiro59]

Thank for the video, I'm doing the same job and also replacing the heater exchanger radiator, it's leaking. At 17:25 you take that center reinforcement so easy, and I didn't manage to take it out, is it necessary to break some tab that attaches it to the metal structure? And you're right it's better to buy OEM control lever.

[@NK1794]

Joao Gameiro I dont recall having to break any tabs. Perhaps that piece was removed before so it came out pretty easily. Good luck with the repair. It’s a real PITA! 😁

[@GUYANESEGT]

i also did this in october. such a pain in the ass of a job. i missed putting back a few screws haha

[@NK1794]

samus aran LOL

[@anommuhajirin5722]

Awesome work, that's a lot of effort to do the job, well done 👍

[@leslieldridz1731]

bravoooo...thanks...greetings from Serbia...

[@alanacampana1200]

is it dangerous to drive the car with this issue?

[@1967250s]

No, just annoying, and the A.C. system may not work correctly.

[@yusuflbs7535]

Hi, need some help here... i have trouble with Mercedes W203 C320.. When AC turn on, Blower off and Compressor On. a few minute later, Blower on and compressor on. After a few minute again, then compresor off and blower still on. Blower have 4 Pin, i measure and its good (1 Pin to Ground, 1 Pin to Interior Fuse, 2 Pin to Module). I measure compressor and its good too. Then i scan it, i get : 1. B1548 Component M2/15 (Left and right footwell flaps actuator) is stiff or blocked 2. B1205 Refrigent pressure too low 3. B1000 the control unit faulty can help me what i must check next ?

[@unrealrai]

I have the same problem. Can you give me list of tools and step wise process?

[@daveshave-illbeback6646]

Should I change the motors as well, the lever was the only thing broken but the clicking noise is still there??

[@robertionut3550]

Hello . I have a problem with my nonfacelift clk200 . The AC is running all the time . When i turn on the fan on any temperature (28 ° 29° ) doesn't matter , still working the AC even if i turn it on/off. Cold air came all the time . Any of you had this problem or do you have any idea what coud be ?

[@1967250s]

Sounds like the on/off button is broken. Did you find the problem?

[@michybarrak2347]

hello for a few days the climate is working badly the truth in ignition was making that annoying noise then at a certain point I don't feel it anymore and from there the climate works badly by replacing that piece should you refocus? what's the name of that piece or scooter? thank you I await news

[@victorking1459]

Black braket radio mount removal?

[@tataaa7]

thx bro alot i have same problem but dont know how to fix it 😊😊 now i know thx wery good video i have c220 think is same thx

[@NK1794]

Elmedin Corbo Thank you for watching and good luck with the repair.

[@54V4]

Also, the notes are very useful. THX!

[@NK1794]

Thank you. I'm glad to hear that.

[@syedpervez7009]

Thank you video is very helpful. God bless you.

[@NK1794]

syed pervez You’re welcome.

[@Mark-yi4be]

Great video! Made me question if I really wanted to tackle this job or not.

[@vpmvda]

Awesome video! Really usefull. Thumps up!

[@NK1794]

vpmvda Thank you

[@Ecovirgo]

Good morning ; Does the noise always last, or does it disappear after a while? Thanks

[@JeremyMilligan1024]

If I understand correctly, you ended up using the original OEM Behr stepper motor and the original stepper arm? Or did you replace the white OEM arm with a fresh/new one?

[@Scouter98]

Hi, is the procedure the same on a facelift W203?

[@colinchiwara7285]

Does the w202 have one cause I'm getting the same sound?

[@ramonfdezfdez7474]

Menudo trabajo, me alegro que al final te funcione.

[@alexi802]

Amazing ! Thank you so much!