1999 E430 Sports Fog Light W210
 

The driver's fog light is not working. I tried a pair of new H3 bulbs. I swapped the old passenger's bulb to the driver's side. I checked the fuse on the driver's side instrument panel. None of the methods is working. Only the passenger's side light up.

I am thinking the driver's side fog light has a loose ground connection. I will need to confirm this with a multimeter.

Where does the driver's side fog light ground to?

Thanks
Car Nut

Replace the harness. There is a repair kit for this frequently defective item. See http://www.peachparts.com/shopforum/tech-help/209810-w210-foglight-connector-repair-harness.html?referrerid=6924