i have ml320 & c320. ml is great , the c320 has a problem with dead battery over nite. great fun to drive and show . pix later bawally USMC siempre fi

 

ok jarhead lets start with a what year is your c class? if it is what i think it is 2003- present? if so then is what i want you to do is charge your battery and disconnect both of your front seat control units there under the front seats then i want you to let the car sit overnight. when you wake up is your battery dead again? if it is not then you need left and right seat control units. if it is dead again you need to perform a draw test.

seat control units about 200 each parts only