License Plate Bulb Out & Trunk Won't Open
 

2008 CLK350 cabriolet... license plate bulb left indication on dash, simultaneously trunk will not electrically open/release. Changed out the bulbs in both license plate sockets. No change. Could this be related to a fuse? Having difficulty determining which one it might be. Thinking the bulb blowing (looked blown when removed) could've blown a fuse. But I am a novice and perhaps it is more extensive than that.


Any advice would be appreciated before I take it in, I'm assuming it may a simple fix. Thank you to all

I'm experiencing similar problems; my 3rd brake light reporting an error is my symptom (it still works, but I suspect the voltage is fluctuating). It turns out that the wiring that goes along the trunk hinge fatigues, then breaks. It's a common problem and is covered in the W211 section (link below). I'm planning on tackling this within the next few weeks.
https://mbworld.org/forums/e-class-w...ate-lamps.html

There is no fuse for any of the exterior lights. They are all controlled electronically by the SAMs. The trunk latch is, too. Although this could be a bad rear SAM, I suspect it;s a wiring issue - maybe a pinched or broken wire in the trunk lid harness.

Seen this often enough at work.. it's atleast 1 broken wire in the trunk lid wiring harness and usually it's a ground wire by the trunk hinges.