battery

Hi, Just returned today from 6 weeks away, and went to start car, but battery is completely flat. Key, and spare, both indicate that they are sending signals, but doors do not unlock. When I look through the window at the dashboard, I see that the clock has stopped. Tried the emergency (blade)...

I have to change washer /indicator stalk on my c class coupe 1.8 compressor 2003. So have to disconnect battery first . Will this create issues after reconnecting ?, ie computer settings etc

Battery light came on today and I’ve checked both batteries and they’re all okay, although rear battery alternator is charging but isn’t charging the front battery. I have checked F52 fuse in passenger footwell and that’s all okay. Any ideas how to fix this? Is there a fuse or relay that you...

The alternator was 'leaking' and has been replaced. This reduced the drain to 1.7A when locked. Curiously, when unlocked, after 30s, the drain drops to 0.5A. But, after 20 minutes, it increases to 1.7A. The battery is good and even after 24 hours will just about start the car. The temporary drop...

Hi currently, have W204, the car appears to be blowing front sam unit. No heated seats, auto lights, wipers or horn not working. Replaced front sam, worked for a week. And it stopped working again. Could this be a fuse or relay? The main thing I would like working is the wipers. If I...

Hi all you helpful lot. My CLK was completely dead this morning. I cannot open the doors even. I have tried the spare key. Clearly an electric or battery issue. Problem is I cannot get into the car. I have tried the Blade but it doesn't 'pop' the lock. The car is 13 years old and the lock has...

I have a c350e. Does anyone know how I stop the car automatically turning on the heating every time I unlock it with my key fob? Every time I go to unplug the charging cable, I unlock the car and it's starts heating up using up my precious battery juice. Any clues? On the Mercedes Me portal...

Hi all I have a 2000 CLK 320 Auto Convertible that suddenly wouldn't start last week. I decided it might be a flat battery so I tried jump starting it from my wifes car. I DEFINITELY connected the jump leads red to red and black to black but after about 30 seconds the heavy duty jump leads...

Hi folks, I thought I'd drop by and post this here in the hope it helps someone else. My own search for answers brought me through these forums time and time again but I happened to find the answer on an obscure video elsewhere after hours of searching. Apologies in advance if this is in fact...

I have a 1987 SL420. I've had the battery replaced twice after it failed (car wouldn't start). I've found the voltage on the new battery when engine is running (tick over) is 12.15 volts. When revving it's 12.3 volts. The alternator is the original Bosch one with a regulator clipped to the...

Hello Mercedes Brothers & Sisters!, I have a W202 Mercedes, 1997 C200 Classic / Elegance. It's covered 200,000 miles but overall is fairly trusty. Recently the car battery light has started coming on - intermittently. Definitely more likely to happen upon "cold" - first usage of the day...

Hi all I have a 2013 E300 Diesel Hybris estate which is great. Unfortunately in response to the above fault warning, I have spent most of the evening trying to locate the Auxiliary Battery without success. I had thought it was under where the spare wheel would go but this has the main...

Hi Everyone Six weeks of ownership and beginning to wish I still had my Porsche, which never let me down, never had an issue. Brief history: Random Limp Mode on motorway journeys. Resets if the car is restarted. Miss-fire on ALL cylinders under heavy acceleration. Seems okay after...

My 2002 ML270's battery drains within a day. The battery has been tested to be good and is also reasonably new. I think I have isolated it to the culprit. When I switch of the car I can still hear a motor running inside the cabin in the dash. I then did the battery draw test which was running...

Hi, I've read some positive posts about the Ctek MXS chargers here. I've had a look through the manual but not sure if it is suitable for my requirements. I want to connect it to the battery of the car when the power is on but not when the engine is running. The same thing they would do in a...

Guys, This may be one of the most remarkable questions asked on this forum but lets see the return. I have attached a picture of two key looking fobs that came with my Mercedes A class few years ago. I literally have no ****** idea of what these are? I welcome your suggestions.

Hi, I have just joined up here with as I have just bought my first Merc, a 2004 E2.7 cdi Elegance. The car is immaculate, but I need to get some assistance with regard to a couple of things and would appreciate any input. I bought the car 10 days ago and apart from a small fault...

Hi, I have a problem with the service indicator on my W209 CLK500. The car had a dealer "A" service 600 miles ago but last week the battery went flat after leaving the lights on.........:shock: It started again no problem after charging the battery but the service indicator now says the B...

Hello guys I have searched for days on end and read so many threads but cannot find an answer to a small question I have which potentially could solve a variety of SL bootlid/PSE/ Consumer battery issues... My fuel is low and the central locking is stuck in lock position for the fuel flap etc...

Hi All, Been lurking for a few years but it's time for my first post. I have an '06 CLS 320 cdi. I love the thing to death but it wouldn't start this morning and gave me the 'Reduced Breaking Power - Start Engine' warning in red before all the lights on the dash gave up. I couldn't...