How to Find Mercedes Battery Draining Components

[@bill4all782]

I am a bit confused with your meter connection, it appears you connected it across the battery which is okay for measuring voltage, the amp meter should be connected in series rather.

[@robertbeltowski2819]

Great advice and video..........Those frickin Mercedes put batteries is the worst places, what a pain...... Thanks.

[@handsomeransom2235]

I swear this is the perfect intro music💯

[@PastorToni]

Man, I have to write down these steps. Thank you Sir.

[@gordonrick9884]

I think my battery drainage problem is my radio because it’s always on when I turn the car on. Please note that I shut the radio off when I turned the cat off at night time. Which fuse disconnects the radio as I try to find where the drainage is coming from?

[@mathewalmada3949]

My Mercedes 320 clk has battery light / visit workshop on I noticed this started when I started getting a warning about my hood being open .but my hood is closed .what do I do

[@nelsonleonard4862]

Good job Boss ❤

[@josephdispensa1475]

Why disconnect the battery negative when you reconnected with the alligator clips still is the same circuit. Don’t you think ?

[@enriqueblessings3768]

not sure if I'm seeing this right, but it didn't look like you connected the multi-meter in series. Is the goal to connect the multi-meter in series?

[@josephmccarthy8153]

He's connected in parrallel

[@jaiparmar9717]

@@josephmccarthy8153 Correct. No need to diconect battery!!!!

[@2326TOM]

Well done again mate!

[@ScottTheEng]

I think your circuit setup is incorrect. The meter should be in series with the circuit. Did I miss something?

[@accidental_relevance]

Could I just check the voltage on the battery and then compare that to the voltage some time later? So if it dropped from 12.6 to 12 I would see I had a problem?

[@iRepairAutos]

Kinda, but that's not a big enough drop in voltage. How old is the battery, what's the voltage coming from the alternator? Does the vehicle have any after market electronics installed?

[@accidental_relevance]

@@iRepairAutos No aftermarket electronics. When I returned from a 10day vacation the 18month old AGM battery was dead and refused to charge. The mfg replaced it for free so I now have a new AGM battery. It has maintained 12.6V since I installed it a few days ago. But just wondering why the previous $200 battery had such a short life.

[@grimlock_rsv4634]

Im having this problem right now. Have no idea whars causing a draw on my w211. Its frustrating. As i type this,my car reads 10v on battery n wouldnt crank to even check the altenator

[@accidental_relevance]

@@grimlock_rsv4634 My project for tomorrow is to look for parasitic draw on the battery so maybe I can be of some assistance later. Voltage is holding at 12.6 for now on the replacement battery. Sometimes you just get a bad battery. And the car had been in the repair shop a few weeks before. Sometimes the technicians do things they don't tell you about.

[@grimlock_rsv4634]

@@accidental_relevance lmk cuz i went n charged it cuz they said wasnt bad but i kno its gna die again

[@dannywilson4177]

Can also be the seat control unit as well..

[@iRepairAutos]

Yes thats true.

[@litya1deep]

Mercedes saying it can b water under the floorboard passenger on wire thats draining battery and say repairs is costly wanting alot could they just b trying to get extra money? I watched a few vids on parasitic battery drain and none shows that

[@janitaayche3635]

My 09 ML350 was at the dealership for 30 days getting a rear SAM. Battery was new under 6 months old. After left shop slow crank after overnight. Now needs a jump to crank. I think they should reprogram the REAR SAM

[@bogcejanceski]

Something doesn't look right.. how did you measure current consumption with a paraoel connection?

[@broanespinosa8196]

Not clear how do you connect cables of the ammeter and battery explain correctly please

[@donk4017]

My radio is stuck on the mercedes logo. Is there anything I can do?

[@chriswright9819]

I aree with the other comments re wrong connection shown in video and should take off one terminal and clip to meter ,other meter lead back to same terminal.I'm planning to use a blown fuse ,solder meter across it (call that gizmo A) and unplug good fuses and replace with (A) and therefore measure current in each fuse position.

[@ascorp3071]

Hello. My W221 S500 year 2006 after unlock car have consumption 16A. I have damage back battery 12V 95Ah. Normal consumption after unlock car is about 2-3 Ampers? Please help me.

[@kieva31]

Hi. Can I connect the fuse reader to the battery terminal posts under the hood instead of the actual battery under the seat in my ml350?

[@Infinitpossibilities]

Hi. I am having issues with a clk w209. It started with intermittent stalling and ecu recovery within 1-2 seconds.....then I went abroad for 4weeks. Came home....it started ok...drove it 10miles then all hell broke loose...really bad stuttering with esp workshop warning and tps failure...would role to a stop and it would start with the key (after 3 or attempts...) it went the 10 miles home stuttering 3 or 4 times on the way...parked it up...charged battery....from there it would sometimes partially crank then die and fan would be on full pelt. No ecu/pcm coms. It occasionally started with battery at full charge and ecu spoke....it did come back with terminal 51 not good and and I would have to battle it cutting out with keeping revs high (no limp mode issue) now it just wont start...not even crank. Esp not available, tps not available, engine overheating switch off now (engine is off) if I charge the battery it is drained within 15 attempts at crank...the cabin light dims when I try to crank...but no ecu coms even in just 2nd ignition position (no crank) auto box stuck in park. Just recently I tried it...red display...battery picture in display....then display malfunction...sometimes with engine picture, sometimes a lightning strike. Is my battery bad? Engine checklight comes on in display so I pressume the ecu is alive? Also all other modules will communicate...just not ecu......any ideas?

[@glasser2819]

it looks like your engine ECU module is not "authorizating" engine crank. Is your engine ECU seating on top of engine itself?? Try to isolate exactly the bad module by analysing what your CAN modules have to say. Most Benz module replacement require dealer to code them to your car so 2 to $3K regardless of what troubleshooting you did already 😅 At least this will give you a chance to get your car fixed at once instead of paying $500 to hear: "sorry, we don't have room in the shop" Some internet shops can refurb your very own module... so no coding needed ie. cheapest & fastest ! ✌️

[@johnblack6340]

I have a 2013 CLS Mercedes Benz whenever I park it in sport mode the suspension drop but it only happens sometimes it will go for days and then suddenly it drops could that be a leak or a malfunction sensor but in comfort it doesn't drop only in sport mode

[@mdamania5]

I have W204 - C350 battery draining issue. I followed your method and could see that drain in close to 200 mA. I tried pulling fuses (from all three fuse boxes) one by one but did not find circuit which is drawing excessive current. Subsequently I tried jump starting the car and nothing happens. No clicking from Starter. Before the test it would start without problem with a jump. What could be wrong? I checked all fuses related to Starter circuit and they are all OK. Your reply will be appreciated. Thanks

[@TyroneShoolaces-f8e]

AC-DELCO Batttery, GM WARRANTY SCAMS; anyone else been scammed by them? they tout a no questions asked 3 yr warranty BUT when my new $375 battery failed in 2 weeks, i was initially DENIED warranty and now been waiting almost 2wks for replacement

[@davidleon6371]

The cold has my car tripping? Other day car started but wouldn't go into gear ? Red light came on inoperative car I turned it off after warming now are won't start.its making a humming sound! I'm stuck & don't know where to start? Transmission may be slipping or something else is occurring! Need your help? ML350 2009. What's your location you might can be of some assistance! My car & cold don't get along!

[@iRepairAutos]

Did you scan the car for error codes?

[@bricksinthewall1192]

Anyone know or can help with my ml500 radio drawing and killing the battery ...it's unhooked now and the battery's fine ...it's the stock radio

[@AndyNav1]

You're doing a fine job. Please keep it on

[@LR-wk2rc]

Where does the drain plug goes

[@corneliusd3688]

very confusing in connecting the negative, black alligator clip. It seems like to connected it to the battery, the battery cable, then connect the meter itself to the battery cable. Very much unclear.

[@prospexican]

hi, what proximity keys means?

[@s.avalentine7581]

Gm I have the CLS 500 and water leaked in my truck so now my computer in the trunk is draining my car (Well it’s Drained) I sent it to Benz where is at now but he talking about 3grand for a new one. Please tell me I can somehow do it myself. If anybody know , I know you will have a answer for. Thanks for your time

[@jboogie8386]

Can you possibly identify for me, the front Sam ground wire location? My front Sam ground wire might be fried and I don't know where to actually look? I have an 07 Benz glb 450. Thank you so much if you can show it!🤙🏾 Much love🤙🏾 Aloha

[@elneneeserio]

Hey man can the ISM "fail" due too a bad fuse or does it have a fuse ?

[@shawna7813]

Got a question: I had an issue where my alternator died and I replaced both the alternator and battery with new ones. Once replaced, the ecu failed to detect the new alternator therefore the car was only getting power from the brand new battery I installed until the power drained. What I observed was that the engine ran a lot differently, it ran like a race car solely on power from the fully charged new battery without a functioning alternator. Acceleration seemed to be ten times more powerful than when I had a working alternator and the old battery. When I got the ecu/alternator issue resolved the car reverted to running the way it did before, which was sluggish from a standstill. Does this indicate that the engine isn't getting the ideal amount of power from the battery/ alternator on a regular basis due to a drain issue? My car is regularly sluggish without any codes. I'm becoming more and more convinced the engine isn't receiving the correct amount of juice for optimum performance...

[@tomorrshpiragu4009]

Be twin the altenater en the batery is electronic pack wich is connected with a negative cable the pins on this pack are very defective that pack controls all electricy in the car

[@user-ut8zq8ie1w]

Can anyone help? C63 2010 battery keeps draining. Mercedes benz did a parasitic draw and couldnt find the reason for dead battery. Car has gone through multiple batteries and just burned through an OEM battery. Car lost power on the road and died. No idea why it drains battery still.

[@niomit8791]

He by passed all circuits in the vehicle by connecting the positive to the DVM. The DVM should be between the negative battery post and the battery post connector to measure the parasitic current draw.

[@Andrewtafelklavier]

i saw that too. its a wonder his multimeter didnt blow up

[@iRepairAutos]

You really believe a 12v system can blow up a voltmeter that can handle more than 10x that amount?

[@ClarkRegan]

@@iRepairAutos you are basically short circuiting a 120 A battery… and btw, a voltmeter measures Volts. An Amperimeter measures current (I). So could you please show the circuit you did since the video is very misleading

[@clvcarclinic9138]

This isn't the way to connect an ammeter to measure parasitic current. It's a misleading video!

[@AndyNav1]

Couldn't figure out the negative lead. From voltmeter to ground cable and then from ground cable to battery's negative terminal?

[@ariansinanaj8668]

In matter of fact it seems that the battery is still connected, so what's the point of dissconecting negative terminal and reconnect it with alligator connector

[@seandickson4480]

Im guessing he put the dvm "in" circuit as to be able to "see" the amperage

[@Gloryhospital]

Was the battery positive terminal also connected?.....should not be! The voltmeter should be connected in series with the battery negative terminal. Fatal error

[@jasperfairfaith3381]

So, on this particular Mercedes, what ended up being the draw? Just curious. What was the faulty component of this video example?

[@bill4all782]

He is just showing you the method its not a real diagnosis, this car is not faulty as it appears.

[@neroviggs5467]

Man I changed the crankshaft position sensor I checked the fuel pump I've checked everything but my ML 500 mercedes benz 2003 won't start

[@iRepairAutos]

What error codes?

[@neroviggs5467]

@@iRepairAutos it's not showing any bro

[@sinaneralp4786]

Have you got any solution?

[@loskamilos85]

Try changing camshaft position sensor as well

[@sinaneralp4786]

I have ml 550, battery and alternator just changed. But battery keeps drainimg every night. First it doesnt ignite, then screen slowly dissappears. I guess there is a power short, but no electrician is able to find permanent solution, they all advise changing the battery, which does not provide any solution.

[@rabeesaleh1457]

This is happened with me i find the drain and it was the redio but the fault wasnt the radio the fault was the rear control unit i replaced and now its ok

[@eledwin21]

I bought the rear control unit but the batter keeps draining, does it need programing?

[@iRepairAutos]

How did you determine that it was the rear sam?

[@killaantdogg]

Just bot a used 2004 e500 from a tow yard car fiers right up after replacing new battery in trunk .had srs esp an a red break malfunction .reducing breaks .had no break presure at all .changed the break light switch an after turning off an on it had breaks for about 10 minn an then it just works an then dont work today it had red battery light an said altinator /battary i reved it turnd off an on bunch of times it went away then out of no where all the erors went away an evry thing worked an then they all came back an no breaks after 5 minn idk im stumped could a minor low voltage couse this

[@00nowhereman00]

I hope it's dependable and doesn't brake down a lot

[@iRepairAutos]

Check the voltage coming of the alternator, check the serpentine belt. And as mentioned already, check your ground connections, terminals can be corroded on the inside connection point. Clean every thing.

[@RTBosch]

Interesting fault finding tactic! thanks iRepair !!

[@derickrideout457]

I need help bad

[@marshallw.6343]

More videos... ! Great

[@chimaobi4870]

My 2007 ml350 the battery always gets drained even when pack at night..I come back in the morning to see the battery drained.. I have changed new battery and it's still happening..

[@sinaneralp4786]

I have the same problem with ml550. Cant find solution. Could you find any?

[@chimaobi4870]

@@sinaneralp4786 yes I did..it was the light on the right door that was onlways one ..I couldn't see it but at late night when u turn car off,the light still remain on, that was when I discovered it.. Check the buttons doors or monitor the dashboard light when u turn off and pack your car

[@stevejones1318]

Did you watch the video!?

[@cc21playa57]

Or his to check no Audio in S class? As a brake caliper remanufacturet how about rear electric brakes or the rebuilding of any caliper ever made? Ac cobra, Rare vintage Ferrari, Lambos, Rolls, Bentley’s? This video use glow fuses so it’s easy to see blown fuses. Or break apart amp to repair without sending them out? Resetting rear calipers with electric brakes, or bypass text and dvd movie so it plays in motion? I only asked u one thing Keith... what up bro ?

[@tahirmughal1262]

I have Mercedes c180 2005 model battery drain problem ac,tape,head light,room light n central lock plz guide what problem in this n side this problem is one relay and other relay

[@nobullshiit9615]

Took my car for inspection 4 days ago and my car was fine and pass the inspection. But got home the car battery was flashing so I called them up they said to bring it back I brought back the guy says there's nothing wrong with my battery and it's fully charged and it looks like they have to dona full diagnosis that will cost $200 so after I paid them 200 to for inspection and to fix what ever faltt they found now my car has a problem I never had before and they want to charge me for it. They got the wrong one I aint going back.

[@iRepairAutos]

They did something to it. Maybe intentionally maybe not

[@Luka-ov1hu]

I have mercedes ml 320 2008 i have replaced battery and putted gel.Batery is charging good after 5-6 days voltage drop to 11.2 and car can’t start after charge battery car start and repeat process in 6 days

[@iRepairAutos]

Something in the vehicle is draining the battery, even when the car is off.

[@Luka-ov1hu]

@@iRepairAutos Thank you

[@Luka-ov1hu]

@@iRepairAutos I sloved one problem with removing android multimedia but I have same problem now

[@Luka-ov1hu]

Something is constantly drawing 1 amp from battery when I pull the fuse dvd player it drop 10 mili amps

[@humundusiturong4238]

How do you make sure your car has a status ZERO if it's a RIGHT HAND DRIVE ML 350. Which door should be opened?

[@iRepairAutos]

The driver's door.

[@cc21playa57]

Should I tell u how to add fluid into reservoir in trunk? U didn’t keep ur word to post so I made a 5.00 tool to do so.

[@iRepairAutos]

Lol. Show me

[@iRepairAutos]

Doing these videos take a lot of time. Between actually doing the repair. Filming and editing them. I only do this in my spare time. I get a lot of thanks and a lot of negative messages too. Sometimes I wonder if I should keep doing them....

[@soonyanaidu7875]

@@iRepairAutos I guess you are adding to knowledge. In India we consider that as the greatest gift any one can give. If you do not receive the gift of negative comments, it sure belongs to the originator of the comment. Peace brother 🙏

[@patsullivan9324]

@@iRepairAutos Keep doing them please, I like your style information and style. Much appreciated!!

[@janantoni3604]

@@iRepairAutos you are the best. I learned a lot watching you on KZbin. Thanks from me and many people who need help. You are great.

[@alanduqu]

On my model (e320) it is the driver window not door

[@jakewrigley6557]

Do not hook up your multi meter like this lol the ammeter must be connected in series. Disconnect NEGATIVE terminal and put one clip on terminal and other on NEGATIVE post. Use negative post and terminal to avoid shorting cuz negative is to ground.

[@tonypagan7468]

Lol I came here and left with no answers 🙈

[@alanduqu]

Forgot to mention the trunk light and how to defeat it.

[@iRepairAutos]

If it's staying on, That's a bad switch.

[@alanduqu]

Nah. It goes off in about 5 minutes. I'm just impatient.

[@rolan6899]

@@iRepairAutos I have that issue the trunk brake light staying on and electric seats not working

[@rolan6899]

@@iRepairAutos what you mean a bad switch. How do I go by replacing the switch

[@alanduqu]

Also don't pull fuses. Instead measure voltage drop across the fuses. Otherwise you might wake up the vehicle.

[@wolloowolloo8397]

you not explain it in detail what you did

[@edhard718]

Don't leave and buttons pushed in... I pushed in my dome light button that keeps lights lights off when doors are open thinking it would save lights but in reality it's "talking to car 24/7 even when car off

[@maxxbenzz7842]

Tried my 2 seat modules and gave up. Time to throw my e320 in the garbage

[@rabeesaleh1457]

You only find the drain but you dont fixed