E420 Blowing Fuse "C"
 

I am trying to solve my electrical problem with FUSE C which continue to blow. After reviewing the manual I discover that Fuse C is on circuit 30 and uses 16 Amp red fuse. All the items on circuit 30 are as follow:

Automatic antenna
CD-Player
Entrance/exit lamp
Anti-theft alarm system
Trunk Lamp
Rear reading lamps
IRCL control module
CL control module
Sound system

I have discount antenna, stereo, cd player, cl control module, anti-theft alarm system, and K38 starter lock-out relay module. Still my Fuse C burns out.

When I connect the battery the front roof reading lamp stays on and the seltbelt light flashes. The lamp will only go off if I turn the switch on the roor lamp off. All the door lights are on won't turn off.

Items that wont work trunk lamp, rear roof lamp, power antenna, stereo display but has no sound, vacuum/supply pumps doesnt come on, doors wont lock or unlock and engine wont crank or turn.

Any ideas on where to check for short?

Today I was able to narrow the short down. The convenience control model local under the passenger set on driver side was fried. The trunk lamp and trunk lamp switch along with the front passenger door continues to blow FUSE C.

Any advice is welcome.

I'm having the same problem with my 95 E320 cabriolet. My fuse controls:

seat belt presenter
trunk light
power antenna
door lights

I believe the culprit in my car is the seat belt presenter. I say this because the seat belt presenter crapped out last year (both sides). The same time I started blowing fuses I found the seat belt presenter came alive momentarily and extended. I'll be digging into this when I retire the car for the season.

What does the convenience control module do?

I was able to identify the electrical problem. After chasing after wires from the fuse C, I discover that in the trunk the hidden trunk lamp wires were melted together. I pulled out all the trunk lamp wire and discover more damage wire which I believe runs to the passenger seat headrest in the rear. I cut all the damage wire and replace it. I have not be able to remove the rear dash yet to removed that wire but I believe it is connected to the headrest.

After replacing the damage wire I have had no problem with Fuse blowing.

I don't know how or why the wires melted together but I know that it took out a resister in the N57 Convenience Control Module which control (power windows, sliding/pop-up roof)