Q: Locking mechanisms malfunction - 2001 Mercedes Benz CL600

asked by on

The locking mechanisms on my car have been malfunctioning lately. These include the passenger's door, trunk and sun roof. All these quit working properly at the same time. I cannot open the passenger's door with the remote. They can only be opened from the inside of the car. I can't open the trunk neither with a remote, key nor the inside switch. Sun roof can be opened very slowly, inch by inch. Is there a connection between these parts? How can I fix this?

Hello. A few things I would look into are the battery and the central lock vacuum pump. A bad battery can cause all sorts of electrical malfunctions. If the battery checks out, I would then move on to making sure that the alternator is also in good working order, as that can also cause similar issues. If the electrical system checks out I would then move on to checking the central lock vacuum pump. The central lock vacuum pump is responsible for generating the vacuum that the door and trunk locks use to operate. If it fails, or detects any sort of vacuum leaks, it will disable these features. I would recommend a battery check and a careful diagnosis of the door and trunk lock issue to determine the correct repairs that need to be made.

Was this answer helpful?
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. Locking mechanisms malfunction - 2001 Mercedes Benz CL600

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: Tensioner needs replacing

Hi. The belt tensioner pulley may need to be replaced if it is chirping. The chirping noise comes from the bearing inside the pulley that is worn out. It is typical for them to be replaced along with the serpentine...

Q: How do I set park lock mode?

When your car is in park lock mode, all of the doors and the trunk will automatically lock when you depress the brake pedal and shift your vehicle out of P. You can manually set park lock mode with a...

Q: Engine power loss and odor from the exhaust

Hello. The symptoms you are experiencing can be caused by a wide variety of issues. It may be possible that the vehicle has suffered a component failure, perhaps at the fuel or ignition systems, which is setting off the light...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...