RepairPal Certified shops can diagnose and repair your 1997 Mercedes-Benz E420. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
check voltage and ground wires may be lacking current, also motor could be going out, unless when you turn dial it dosent go to next level even though dial turns
thanks, but do you know where it is located?
UNDER PASSANGER SIDE DASH BOARD MAY HAVE TO PULL PANEL, LESS THEN 1 HR TO REPLACE. EASY FOR YOU TO DO.
Great! thank you very much
UR WELCOME