Recetly I have this problem on my 2005 c230 k,Iget fuse 8 on backsam blow.Is continue blowing,i diconect the antena amp on the rear class but continue blowing the fuse.What else are conected to this fuse for disconect to check were are the short circuit or if some one have the wiring diagram to trace this circuit to found the problem.Also if some body know how to fix I will appreciate the help.

 

ive had a car with the same issue..this was a hatchback C230 coupe, the wiring harness around the rear liftgate/trunk glass was chafing on some clips. youll need to remove the interior plastic trim around the rear window and look for where the wire harness is rubbing something.

 

My is a coupe and don't see any damage on the wiring throw the post and the rear class, I will try to trace the wiring,but if some one know to were places this circuit goes I will appreciate the help.