There is a couple of ways to fix this problem.
Mercedes lock door with engine running.
Ive done it by starting the car open drivers door hit lock button on door then use metal key inside fob to manually lock the driver door.
Reach inside and hit the power lock switch and lock the doors.
Roll down the drivers side window.
Only way i know how.
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.
Lock works perfectly now.
If you turn the key from man position back to auto you must reset the sliding door.
Open the door and exit the car.
They found that there was a loose wire inside my door.
Posted by 3 years ago.
On those models the door lock actuators may fail causing the door lock to bounce up and down several times.
Then briefly press one of the buttons to completely open and close the door once.
Unfortunately i had some problems with the mercedes a glow plug went out and i decided to have all six replaced at the same time and after 6 years the vehicle battery failed and i had them replace the rv batteries at the same time.
The engine might not be running when the car is first parked but will come on later as the car s batteries run down.
Original poster 1 point 3 years ago.
Lock mercedes benz while engine running.
Drivers can lock and unlock the car just by touching the door handles.