Mercedes Benz repair: mercedes benz, clutch plate, mercedes benz

Question
COULD SOMEONE PLEASE TELL ME WHAT THE "D" CODE RELATES TO ON MY CAR FOR REPAIR...THX

Answer
check plugs wires transmission filter flush and fill, alignemnt, oil filter chance, air and cabin change clutch plate for wear, refill differential, inspect front end replace struts shocks, brake pads for wear, pretty much whole ball of wax 4 hrs tech time minus parts