'98 C280 electric seat controls intermittent
 

I have a '98 C280 that has intermittent electric seat controls. It is getting progressively worse. Sometimes the seat and headrest controls work, sometimes they do not. It is BOTH sets of controls on the left and right sides. They either ALL work or none of them work. It sounds like an intermittent ground connection. If they are not working, sometimes I can drive for 5 or 10 minutes, recheck and they start working. I have no experience with the seat controls and did not find much on them in the archives. Anyone out there know anything on this problem?

Kid

Power seats inop at times
 

Hi----- Remove the trunk floor trim,remove 3'x 2' black plastic panel above spare tire,there is a relay mounted on it's side about center of that area. Repair cracked solder connection on internal circuit board if you have the skills or replace the relay. Good Luck ---- Ray

Success!
 

Thanks so much for the help! I replaced the relay and all functionality is back!

:D