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?

A: Hello. A few things I would look into are t...

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.

Need advice from certified mechanic? Get help now!

Over 1000 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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: ESP and ABS malfunction, shifting issue, brakes locked up

Hello. This can be caused by a number of things. I usually start by scanning the computer for codes to see what shows up. Most of the time, this is caused by a speed sensor at one of the wheels...

Q: Electronic door lock/unlock can't be unlocked from inside car

Hello. Most of the time this is caused by a malfunction in the door lock switch. I have seen the switch short internally and cause this. I have also seen the control module for the locks fail, keeping them from...

Q: Seven warnings came on, can't shift from park to drive - 2001 Mercedes Benz CL600

Hello. From the symptoms you describe it would appear that your vehicle may possibly have a faulty stoplight switch. The stoplight switch lets the computer know that the brakes are being applied, so that the vehicle can be safely shifted....

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.