There is a couple of ways to fix this problem.
Mercedes benz automatic door lock.
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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.
If just one lock won t open on your mercedes then the problem may rest with broken wiring a bad solenoid or perhaps with a blown fuse.
The horn will beep once to tell you that auto lock was deactivated.
Check your fuse box first to determine if a blown fuse is keeping the lock from working.
Press the unlock button then press lock again.
Dealing with mercedes benz ignition switches alarm systems locks as well as immobilizer systems is work best suited to a professional mercedes benz locksmith for proper maintenance and repair.
It will beep twice if you re reactivating the system.
On those models the door lock actuators may fail causing the door lock to bounce up and down several times.
The system then sends a signal to the customer s vehicle and unlocks the doors.
Click on the door unlock button.
If so replace the fuse.
W204 mercedes 2012 c300 engine oil dipstick.
Once the service request is processed the mercedes benz response center will notify the customer through e mail text message or you receive a telephone call to confirm that your vehicle has been unlocked.
Turn the ignition back to off and listen for the horn to beep one time confirming that the programming was accepted.
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