Usually when vacuum door locks begin to fail they fail systematically.
Mercedes lock door with engine running.
In other words it s rare that all of the doors in your car will be unable to lock but it s typical for one door at a time to begin experiencing problems.
If you want to lock your vehicle from the outside simply touch the sensor located on the door handle.
Take 1 inch of electrical tape and apply it around the door lock pin.
This prevents the door lock pin from bouncing up and down when you lock the door or when the doors lock automatically.
Here s how you can lock the doors of your running car from outside.
Your door lock should not bounce up and down anymore.
You can also turn all features off by opening your door.
January 24 2016 at 12 10 pm.
That is a poor setup.
Original poster 1 point 3 years ago.
The way that this fix works is by creating resistance at the door lock pin.
Symptoms of vacuum door lock failure.
Press the button a second time and the dash lights and all electrical items will turn on.
Only way i know how.
Take your mercedes benz for a test drive.
Press a third time with your foot off the brake and everything turns off.
But do give it a quick check first.
Posted by 3 years ago.
Ensure the door pin can go up and down.
Lock mercedes benz while engine running.