w211 battery drain

[AMGeed]

Who or what is Wise?

WIS - Workshop Information System

 

[wilko50]

Do all your window/mirror and seat switches work properly?

I had a drain and found I had a faulty door controller (all door/window/seats/speakers connect here). 2nd hand one from the bay of fleas for £10 and my drain stopped.

You may have to test the fuses with an inline fuse tester in the dashboard, engine compartment and boot to isolate which module is causing the drain.
It can be hard to pin down.

I have same issue and have brought a door module computer for £10.00 on Ebay Please can you advise me, do I need to disconnect the battery before fitting it, or will it be ok ? Thank you

 

[AMGeed]

I have same issue and have brought a door module computer for £10.00 on Ebay Please can you advise me, do I need to disconnect the battery before fitting it, or will it be ok ? Thank you

I didn't disconnect the battery to change the door control module.

 

[wilko50]

I didn't disconnect the battery to change the door control module.

Thanks, I wont either, its a pain