Rear Window Defogger Led Inoperative
WARNING: This page is about a different car, the 1996 Mercedes-Benz E320 and 1996 Mercedes-Benz E300. However, it is still accessible from the selected car via links, so may be relevant.
If rear window defogger LED is inoperative, check combination control module heated rear window LED indicator circuit. Perform TEST 25 under SYSTEM TESTS.