Both my front seat controls don't work , does any one know what I can look for ?

Yes,u gotta find the wires under seat or rug and check for 12 volts ,or find out if there's seat relays in fuse box under hood ,

lift up spare tire cover, then remove black cover with 3 screws. you will see a relay, tap it with screw driver, see if seats work now

I just fixed mine today 2000 C280 was the relay located in the trunk right next to the fuse box $35. at the dealers