Repeat this procedure with the system in the locked position.
How to fix door locks on mercedes w116.
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Take your mercedes benz for a test drive.
Also the handle and the lock pin works on the inside of the passenger s door.
We have repair parts available along with instructions.
Take 1 inch of electrical tape and apply it around the door lock pin.
My key works on the driver s door boot lid and ignition.
It is often possible to hear the leak without removing any panelling.
Ensure the door pin can go up and down.
Classic mercedes w123 w126 w116 door handle removal without a key.
What you need to do is to apply a small amount of tape to the door lock pin.
Set the system in the unlocked position.
Your door lock should not bounce up and down anymore.
Mercedessource tech help 1 failure point are the rubber diaphragms in the door lock actuators these vacuum door locks are prone to failure because of age and nothing gets more deterioation that the rubber diaphragms on the acutators themselves.
Remove the door pin or at least pull it up in the unlock position.
Run the engine at idle and place your ears near the lower edge of each door interior in turn plus the lock area of the drivers door plus trunk lock and fuel flap.
I ve been told that maybe a lock smith might get the lock barrel and key matched again if point c is.