Passenger's Mirror Heater Inoperative
WARNING: This page does not describe the selected car, but rather 56 other vehicles, including the 1999 Mercedes-Benz CLK430, 1999 Mercedes-Benz CLK320, 1998 Mercedes-Benz E430, 1998 Mercedes-Benz E320, and 1998 Mercedes-Benz E300. However, it is still accessible from the selected car via links, so may be relevant.
If passenger's side mirror heater is inoperative, perform TEST 11: PASSENGER'S SIDE MIRROR HEATER VOLTAGE SUPPLY under SYSTEM TESTS. If voltage supply is okay, replace driver's side heating element.