Lights out, can't locate the Sewer/Electrical panel
I'm on the road in Northern CA & have the same problem, running lights and tail lights out, brake & turn lights working.
I went through the Mercedes fuses (all). The forum fix is another secret fuse box in the Sewer/Electrical panel access.
I have looked all around the sewer connection, left rear access door, & have not found any markings as noted.
What compartment do I look for this "Sewer/Electrical" access? I have a long drive back to Louisiana & would like to have all lights.
Thanks to all for your input.