I have a 2004 c32 with ~40k miles. Today some odd electrical problems started up. Of course my warranty ran out about a month ago. Since the lease is only a few more months and no warning lights are on, I'm inclined to just trade the car rather than throw more money into the mercedes toilet.

Three distinct problems started and I can't figure out what they have in common other than the fact that they use electricity:

The seats will only change direction back or forward if you move them all the way to the end of the track in the current direction.

Auto down works but auto up does not on all four windows

The super charger seems to be randomly engaging. Sometimes I have a c32 sometimes I have a c320. It's like spinning the wheel of fortune every time I step on the gas.

All common W203 problems for the age of the car. I remember having all these issues in early 05 (car was 3 years old then).

1) Replace your seat modules. It's draining your battery.
2) Windows need to be reset since the "gremlins" are draining your battery. Press them for 3 seconds up and 3 seconds down. Try again with all windows including the sunroof.
3) Bad IC pump. Do a search and get a Johnson pump.

Good luck.

+1

a good time to pick up a bigger IC... with that new pump.

your power problems will go away.