2007 R320 CDI, Marker light fuse?
 

The warning came on that the right front marker light was out. Lights on, checked, yup, its dark.

Took off the cover on the front bumper for the fog light space, reached in with a screwdriver and pushed the rear clip to pop the fixture out of the side of the car.

Changed the bulb, no joy. Tested the socket, no 12v.

Looked online for hours to find a R320 fuse chart, nada.

If you know the fuse number for this, please also mention which of the three fuse boxes its in. Thanks!

I do not have the answer to this but my R320 has the exact same problem, has had it since we have owned it

I had a minor fender bender and took the car to the body shop. They took out the headlights to do their work. When they reinstalled them, they had to reset the car's computer in some way to have it properly recognize the headlights. When doing that, the side marker light came on again.

When the computer detects a burnt bulb or other issue, it turns the power off to that circuit. To reinitialize that circuit, the computer needs a reset.

Take your car to your Indy with the STAR system, or take it to the dealer. Its a 15 min fix.