Battery draining

[mercsclass]

Hi all i have got a W220 S Class for some reason my battery keeps on draining i can use it one day and the next it will just be flat again i have had the battery checked and everything else works fine the radio is off and all of the lights when i lock it up just wondering if anyone else has had the same issue thanks

 

[Blobcat]

Hello and welcome,

Items not shutting down in an S-Class is quite common unfortunately

I'd be looking at the Comand system and pulling the fuse to see if that resolves (or at least identifies) the issue. Usually something preventing the canbus shutting down - can also be damp in pax footwell

 

[GRTMan]

Hi all i have got a W220 S Class for some reason my battery keeps on draining i can use it one day and the next it will just be flat again i have had the battery checked and everything else works fine the radio is off and all of the lights when i lock it up just wondering if anyone else has had the same issue thanks

First you need to determine: is it the battery or the car? So one day disconnect the negative battery lead (be careful to wrap something around the disconnected lead) to stop it shorting on the body). Then leave the vehicle the same length of time. If possible monitor the battery with a volt meter. Reconnect the next day and see if the battery is flat again. If it is flat, the fault is in the battery. If not, the fault is in the car.

 

[green1001]

Hi all i have got a W220 S Class for some reason my battery keeps on draining i can use it one day and the next it will just be flat again i have had the battery checked and everything else works fine the radio is off and all of the lights when i lock it up just wondering if anyone else has had the same issue thanks

 

[W220 france]

Hello, I had the same issue with mine. Turned out to be the ac blower fuse that was blown. Replaced it and never got a problem again.


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