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Step by step instructions for do-it-yourself repairs
Center Brake Light & Trunk Not Opening
The trunk in my wife's 2004 E320 quick working one night after my 9 year old son got in the trunk to retrieve his baseball bag. She was certain he had done something to break it when it didn't work the next time. Well following your advice I found two broken and two badly damaged wires which I was able to fix quickly. Her trunk is now working and someone will be having crow for dinner!



This is my first post even though I have read threads on MBworld for years. This thread was sooooo helpful. I would have never guessed broken wires would be the cause of a sudden stop to my trunk soft close working. Fuse was the first thin on my mind with fears of something much worse. After reading this blog. I was able to solve this problem in 20 minutes. One broken brown wire was the culprit. Thanks to everyone on this thread a huge thank you. I will try to help others as you have helped me today
I have the same problem, trunk won't open, 3rd light & license plate lights.
I can't check the wires either to see if they are disconnected or broken, coz I can't open the trunk at all (with the remote, switch in the door, or the manual key)
So how can I open the trunk to see if my wires have problems which seems to be the case with everybody else on this forum.
I am really frustrated and need to open my trunk, my golf clubs are in there and lot of my office papers that I need.
Can you please help????




You turn it and hold it turned. (I forget which way) and then while it is turned you pull the trunk release handle.
The Best of Mercedes & AMG
Thoughts?




Have you used the key before?
Did you try turning the key (holding it) and them pulling the release?
Thoughts on why the mechanism might run but not unlock and why it only occasionally runs from the trunk lever but won't open?
I looked at some of the pictures here and I do not have the same setup or wiring.
2009 C63 AMG
My right license plate lamp will not work, center brake light "flashes" when pressing the brake, only twice and then it will not turn on again.
Reverse lights seem to be affected too, they flash for about two second and turn of for about 5 sec and it repeats.
Making it dangerous at night when trying to reverse into my garage. So, stopped driving it. I have a check schedules at the stealership Friday.
I really would like to find the solution before that day comes.
If anyone has the same problem with this same model please, let me know.
I have checked everything that I can in the truck and everything seems fine.
Replaced the bulbs on all sockets and nothing has changed.
I'll post some pictures.
Thanks for the help!
Last edited by AMG6N3; Mar 25, 2018 at 03:54 PM.
I looked at some of the pictures here and I do not have the same setup or wiring.
2009 C63 AMG
My right license plate lamp will not work, center brake light "flashes" when pressing the brake, only twice and then it will not turn on again.
Reverse lights seem to be affected too, they flash for about two second and turn of for about 5 sec and it repeats.
Making it dangerous at night when trying to reverse into my garage. So, stopped driving it. I have a check schedules at the stealership Friday.
I really would like to find the solution before that day comes.
If anyone has the same problem with this same model please, let me know.
I have checked everything that I can in the truck and everything seems fine.
Replaced the bulbs on all sockets and nothing has changed.
I'll post some pictures.
Thanks for the help!
I have 2007 E63 Amg and my trunk is acting up. At first the electronic trunk closer stopped working: it wouldn't light up and didn't work. But I could open the trunk just fine with remote, although it would only pop up half the way, and the 3rd brakes worked fine.
In my attempt to fix it, I pulled the driver side trunk cover off. I inspected the wires and didn't see severed wire. The wires go into a plastic tube at the end, and I am not sure if wires get severed there or not. I had W211 E350 several years ago and the wires were broken right where the trunk arm is. Anyways, then I played with fuses. Replaced few with the same color and Amp that I had as spare. I gave up and installed everything back only to find out that actually the 3rd light stopped working now. And the remote won't open the trunk. So I made it worst.
Can anybody tell me where the wires usually break? Or what else can be the issue? Also which fuse is in charge of the trunk opener.
I was unable to open the pictures that everyone quoted as being a lifesaver! The thumbnail remains black screen. I have the same symptoms. Couldn't open trunk and had to remove seats and enter from the cabin, made a direct connection and the trunk only opens via a toggle inside the car, on the rear deck. Also, I haven't third brake light, no trunk courtesy lights but license plate lights are fine,HOWEVER, i have no rear lights! Emergency flashers and turn signals are fine, one stop light, a very, very dim running light and one reverse light. All bulbs are fine as I had them checked and personally saw them working. Do the tail lights also become affected by the hinge wiring problem? I am in Venezuela, there are no MB mechanics here anymore as all have fled the dictatorship but I am a USAF Major and am assigned here for another 2 years, so my only joy and distraction is my 2003 E320. Any suggestions, guys? Thanks in advance!
I was unable to open the pictures that everyone quoted as being a lifesaver! The thumbnail remains black screen. I have the same symptoms. Couldn't open trunk and had to remove seats and enter from the cabin, made a direct connection and the trunk only opens via a toggle inside the car, on the rear deck. Also, I haven't third brake light, no trunk courtesy lights but license plate lights are fine,HOWEVER, i have no rear lights! Emergency flashers and turn signals are fine, one stop light, a very, very dim running light and one reverse light. All bulbs are fine as I had them checked and personally saw them working. Do the tail lights also become affected by the hinge wiring problem? I am in Venezuela, there are no MB mechanics here anymore as all have fled the dictatorship but I am a USAF Major and am assigned here for another 2 years, so my only joy and distraction is my 2003 E320. Any suggestions, guys? Thanks in advance!
I had trunk issues too. You will need to open the trunk manually using the metal key that is inside the main key. You will need to remove few plastic covers. It is an easy job. Good luck






