Join Date: Feb 2016
Vehicle: ML350 2006 60k miles, SLK320 2002 with 100k miles, C230 1997 150k miles
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Battery drain and fog lights on even with its fuse removed!
I have a 2002 SLK320 (100k), with battery drain issue.
I found the fog lights coming on randomly as if there is a wire moving loose. Few seconds and they are on for as long as the battery has power. The surprise is: even when I remove the fog light fuse, it would not go off. Note that when fuse is removed and the light is off, turning the fog light on doesn't turn the light on (confirming that the fuse is in fact for the fog light).
I changed PSE and Vario modules... nothing changed. I took the car to 3 dealers, no luck after $1500 diagnostic costs. I even swapped PSE with a friend's car, his car worked well while mine is still having issues.
I also checked the wires (as much as I could) but found nothing. the car is accident free and in a good shape. I don't know where or what to look for!
What should I do? please help.