Hi,

I lurk on this forum every now and then. I have 2 W202s I am working on. One is a 1999 (mine) and the other is a 1998 (my Dad's). The 1998 is having issues with power windows. All windows as of this morning are not operative. Besides checking the fuses, is there a relay that controls all 4 windows?

Also, both cars have intermittent operating power seats. Is there a relay for these too?

Update: The fuses on the 1998 check out for the windows and seats.

To fix the windows, where do I go from here? They worked fine yesterday from what my father said.

Both cars have a networked interior series of computers.
The window switch is a computer as well as each door has a module.

Start with the most likely, the switch assembly. SWAP them.

__________________
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Hi,

The dealer referred me to replacing this part number: 001 542 78 19

They call it a multi-function / comfort relay. They say the relay controls the seats and even the windows on 98-00 w202s.

Any other thoughts?

Do a search. Search is very powerful. If you searched on "C280 seats" you would find this thread:

'98 C280 Power seat problems

That thread answers the seat problem. As far as windows, they are all on the CAN bus like MB DOC said. I never heard of them all failing at once. I did not know that relay had to do with the windows also. It is worth a try. You can try fixing it as explained in the other thread or just buy it.

__________________
1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra