Q: 2006 ml350 Mercedes SUV, car locked but driver door opens without key present and alarm goes off.

asked by on

Car completely locked but drivers side door opens and sets off alarm without key present. The door lock indicator just inside the window is down showing locked but after first handle pull the door unlocks and opens setting off alarm.

My car has 50000 miles.
My car has an automatic transmission.

Many door locks are controled by a door lock actuator inside the door. This actuator is connected to metal rods that mechanically activate the lock when the actuator moves electronically. It is possible that one of these metal rods has come disconnected from the door handle but is still connected to the lock. I would recommend having your driver door panel removed to inspect the lock mechanism. Consider YourMechanic as door lock actuators can be inspected or replaced at your home or office.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. 2006 ml350 Mercedes SUV, car locked but driver door opens without key present and alarm goes off.

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car acceleration is slow to respond to gas pedal

Hi there. From your description I am going to assume you try to accelerate and the engine speed does rise, but it feels like the transmission doesn't engage until a higher engine speed and then it catches. In this case,...

Q: Car won't start after doing valve cover job.

Hi there. From the description you have provided, something was reassembled incorrectly. Not replacing the upper intake (plenum) gaskets should not have caused the vehicle's no start condition. Once that you have the plenum removed, carefully inspect all the components...

Q: Mercedes Misfire codes Po300 301 302 303

Ruling out ignition or fuel system problems is a lot of work. I usually do it by substituting components from non working cylinders to working cylinders to see if the misfire moves. Misfires on one side of the engine like...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...