kajc67

2008 451 Cabrio tailgate malfunction

3 posts in this topic

Hello All,

 

I have a 2008 451 Cabriolet. A common problem on this model is the tailgate will sometimes not open due to a part failure. This is the second time this has happened to me, but this time seems to be different. A few years ago I had to replace the actuator, which required me drilling two holes in to the tailgate from the inside so that I could slip in a small screwdriver to release the locking mechanism so this step is already done. I automatically assumed it was the actuator again and replaced it, but it didn't work. I read in forums that it could be the microswitch, which is part of the handle you squeeze to open the tailgate so I replaced it, but this too, didn't work.

 

I have checked fuses and they are fine. As well the front and passenger door locks work fine. I don't know what else it could be. Has anyone else experienced this?

 

UPDATE: 

 

Can anyone tell me if when the tailgate is locked does the actuator engage when you grab the handle or does it not function when locked. Does this make sense? I need to narrow this problem down so I need to know if when locked it deactivates the actuator or if the actuator still makes that operational noise, but just won't open (I cannot remember). I am considering replacing the automatic lock mechanism on the right side of the tailgate. It's the last thing I can think of that I can do myself before taking it in to a dealership.

Edited by kajc67
Thought of another part to replace, question regarding this step.

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Welcome to CsC.  I have had issues with wire corrosion inside the tailgate of my 2011.  You may have to remove the tailgate panel and have a look for wiring issues. 

Edited by Huronlad

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Hello Huronlad,

 

I just finished checking the wires in the tailgate and all appears to be well. I think I am going to have to take it to a Mercedes dealership. Ugh! Anyhow, thank you for taking a shot at it.

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