W204 electrical issues
Thread Starter
Junior Member
Joined: Dec 2016
Posts: 53
Likes: 5
From: New Hampshire
C400
W204 electrical issues
2011 Mercedes c300 4matic. My headlight switch does not work, the headlights are always on and the switch isn't illuminated. The sensor works because it turns illuminates some buttons at night. The ESP, hazard and heated seats are also dead and don't illuminate. The baffle vent in the trunk next to the fuse and sam unit was missing and there the area was wet so I thought the rear sam unit got wet and damaged. I replaced the unit and it didn't fix the issue. I brought it to a mechanic where he ran a diagnostic test (I forgot the name) and he got a few low voltage errors but he was stumped. Had the battery load tested and that was fine too. I'm stumped and dizzy from reading threads over and over to no avail. Any suggestions?
