We've heard it a million times, now I have the problem....

2000 C280 Sport, 115K miles. Car runs great..........something is draining down my battery.

Had a new battery installed by MB in April. At first, if we didn't use the car for three days, it wouldn't start. Now we can't go 24 hours without the battery being down below 12V and car won't start.

I disconnected all the seat modules plugs under both front seats and the battery is still dying.

I sat in the car last night for a 1/2 hour to see if anything reactivated once the car was shut down....nothing.

I haven't started the fuse pulling with a VOM in the line, as I was told this might not prove anything as the car needs upwards of half an hour to really shut down certain circuits???

This is such a shame. We've owned the car since new and it is in perfect condition otherwise. We bought a new C350 and this car simply doesn't get used all that often.

Any help would be appreciated......

 

hi i have the same problem and my brother traced it to the bose amp in the boot he put a voltmeter on the battery pulled the fuse on the amp it self battery drain stopped ! put the fuse back in the drain restarts battery dead in 48hours unless car is run daily had a new battery fitted 100amp hour largest that will fit in the boot. so far this battery copes with the small drain the amp put on it hope this helps