The sensor typically uses a switch with a spring loaded plunger that is compressed when the door is closed and is released when the door is open.
Mb front door handle light always on after door closed.
If a door unlocks but will not lock again then replace the door switch.
The striker fails to penetrate into the door jamb because the door.
I heated the shop to perform a 20k maintenance on the car which thawed the car out for the first time in a couple months.
Open and close lock to recalibrate.
I had the same issue with my 2002 tundra.
When you come in kick the door shut wash your hands then lock the door a us doctor advises.
Perhaps your mercedes locks work but they open and close slowly.
Parked it on friday went out to find the door ajar light on saturday morning.
After reading this thread i decided to swap out the plunger courtesy switch on the driver s side.
How to fix a door that will not lock.
The overhead light and the door ajar light would flicker when i closed the driver s door but remain on.
It caused ice between the door seal and the door to melt and subsequently refreeze once the car went outside essentially freezing the door closed.
Source istock when it comes to taking extra hygiene precautions you can never be too safe.
You likely have a shorted door lock actuator which you can replace with a new unit for the lock that is not working.
It turns out that i had a very easy one this time.
Door locking problems almost always originate in the door latch not the locking mechanism.
The door locks on the driver s door or the rear right door occasionally do not lock unlock when called for either by keyless go touching the outside inside of the exterior door handle or the central lock buttons on the front doors.