Perhaps your mercedes locks work but they open and close slowly.
Mercedes a class rear door wont lock.
You likely have a shorted door lock actuator which you can replace with a new unit for the lock that is not working.
This issue is a failure of the internal door lock actuator which is failed in the lock position which is causing the door not to open.
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How to replace door lock actuator if the door locks in your c class are bouncing up and down or are otherwise not functioning properly the system s actuator might be broken.
Apply wd 40 or equivalent product directly into the lock.
So my question is this.
On those models the door lock actuators may fail causing the door lock to bounce up and down several times.
There is a couple of ways to fix this problem.
Now the rear door on the same side has the same problem.
If a door unlocks but will not lock again then replace the door switch.
The actuator will have to be replaced which will require the door panel to be.
Question rear door wont open on my 2009 200 c class jq.
It does not work with either the central locking or auto lock on movement of the vehicle.
Earlier this year the driver s door would occasionally not open unless i pressed the key fob repeatedly.
I have just acquired a 2008 w204 c320 cdi sport saloon and have also just found out that the rear left door lock does not go up or down and its stuck in the unlock position hence doesn t lock when the lock button is pressed.
Our local mechanic couldn t identify a problem.
I have been quoted 1000 at the mercedes main dealer so wanted to know if anyone had any advice on what it could be before i commit to spending that much.
I have seen a couple of used door lock actuators on ebay for under 60 for my car.
It has to be manually locked and released.
I have mercedes benz c class estate 2009 model that has developed a door locking issue.
Mercedes benz vehicles such as e c s ml gl r class are designed to automatically lock the doors as soon as you start to drive.
This is a costly component to replace at the repair shop but it is something you can do at home.