It turns out that i had a very easy one this time.
Mb front door handle light always on after door closed.
After reading this thread i decided to swap out the plunger courtesy switch on the driver s side.
The overhead light and the door ajar light would flicker when i closed the driver s door but remain on.
You likely have a shorted door lock actuator which you can replace with a new unit for the lock that is not working.
Open and close lock to recalibrate.
I had the same issue with my 2002 tundra.
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.
Well in that case if trying to clean unsticking the door lock actuator and then spraying with some white lithium grease and still won t free up the inside door panel will have to be removed i am pretty sure you will have to drill out the rivets on the inside to access the actuator then put 4mm or 5mm screws back on it when finished there are several electrical plugs you can t see until the.
If a door unlocks but will not lock again then replace the door switch.
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.
Apply wd 40 or equivalent product directly into the lock.
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.
This action opens and closes an electrical circuit sending a signal to your vehicle s computer activating the door ajar warning light when the door is open.
How to fix a door that will not lock.
Source istock when it comes to taking extra hygiene precautions you can never be too safe.
Parked it on friday went out to find the door ajar light on saturday morning.
Perhaps your mercedes locks work but they open and close slowly.