If a door unlocks but will not lock again then replace the door switch.
Mercedes a class door lock fault.
Currently in its third generation the c class mercedes is a compact luxury sedan that blends elegance with dependable performance year after year.
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.
Once you start to notice this niggle it might be sensible to sort it immediately as if the boot lock fails and you can t access the boot it could be very inconvenient.
Apply wd 40 or equivalent product directly into the lock.
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.
Details about mercedes c class w203 2000 2007 door latch actuators repair kit spring x2.
If you are finding it difficult to open the rear hatch then it is due to a problem with the boot lock.
Door lock jumping up and down quickly door not locking or only periodically door lock rattles.
It is a common fault on these vehicles for a small spring within the door lock actuator to snap causing the symptoms noted.
Open and close lock to.
Perhaps your mercedes locks work but they open and close slowly.