Hi, My situation are as follows:

Both Power Seats, Side Mirrors and all Windows except Rear Right on my Mercedes W210 (1998) are not functioning. Remote locking and the rear blind works fine!

Will disconnecting the battery for approximately 30 minutes reset the electronic faults?

Your valuable feedback could save me from unnecessarily replacing the Electronic Relay.

Thanks!

Try it.

With the battery disconnected, step on the brake pedal for 30 seconds.

Brilliant advice and it really works! Thanks a lot Matt L. :-)