S320 power window not working

New components can have faults also, try changing regulator under warrenty and see if hat cures the problem

Don't waste your money on unnecessary sources and unwanted repairs.
Get this manual online at www.reliable-store.com and get complete guide on whether to repair or not, service it, and how to repair etc

PERHAPS THIS MODEL HAS AN ADD'L FUSE BOX UNDER REAR SEAT. WE DONT HAVE THAT MODEL IN USA

Is the fan blowing, do any of the knobs work ? Can you be more specific ?

the wipers and turn signals are probably a faulty switch (a common problem 0 I have a 1994 c180 and have had 2 switches on they vary from the flashers not working or wipers coming on by them selves or not working at all indicators not working can but from ebay for about 30 pounds hope this helps ivan

Check Mercedes forums how to synchronize windows etc after battery replacement. Common for MB cars but different procedures on different models.

replace the window switch

Just double check that you havent blown a fuse/or fuses, it may be that simple!

i have same problem on 1997 s420, don't know why it is happening. but you can replace cigar lighter fuse then replace seat/mirrors/steering wheel fuse and all is well. thnx

Control unit (with MANY wires) is inside trunk on right side and there is a fuse box with 3 fuses at the "REAR"...assume trunk again...I have schematic only...remove the Control unit wire connectors and re-insert them to polish the contacts...