Q: Locking mechanisms malfunction - 2001 Mercedes Benz CL600

asked by on September 28, 2016

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?

Alternator Replacement $149.30 - $1391.75 Get a Quote
Vacuum Pump Replacement $94.75 - $1259.92 Get a Quote
Power door locks are not working Inspection $79.99 - $89.99 Get a Quote

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.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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

What others are asking

Car horn honking by itself

Your clock spring is likely faulty and shorting. The clock spring is the device between the steering wheel, and steering column. It allows you to control the functions of the steering wheel, and turn the steering wheel, while holding all...

I filled up the windshield washer fluid to the fill line and it's not coming out now; how do I get it to flow through?

Hi there. There are three individual components that comprise the windshield washer system that can be broken or damaged to cause the issue you’re having on your 2001 Toyota. The first and most common is that the windshield wiper spray...

Loud noise from car while driving slow

The fact that it is speed related leads me to think it is somehow related to the tire area. Calipers are what actually apply the brakes on the car when you step on the pedal. If one of the caliper...

Engine stalling at low speeds while shifting from first gear to second gear and reverse, with P2757 code

P2757 indicates a torque converter clutch solenoid control circuit issue. If the transmission has been rebuilt, then wiring between the control unit and the transmission may be faulty. The harness connector from the wiring harness to the transmission needs to...

My transmission jerks hard when I floor it

Transmission shift problems can be caused by simple faults, such as a low fluid level, contaminated fluid, plugged filter in the pan, bad shift solenoid(s), faulty throttle position sensor or speed sensor, but shift problems can also be due to...

Engine vibration

Unfortunately there are many different reasons that could cause your Honda Civic to experience engine vibration. These include but are not limited to worn out suspension, defective tires or even weak or broken engine mounts could all lead to your...

Went to flush radiator, car heated up and refused to turn off

There is a vacuum pump on the front of the engine near the water pump, The large vacuum line that comes out of it branches off to three or four smaller lines not far from the pump connection. They are...

High idling, 8800 RPM

Hello there, 8800 is a very high idle. Most vehicles max out at between 6000-7000 RPM. If the vehicle idles at 800 RPM, then this would be considered normal in most cases, unless the idle fluctuates unusually. If the AC...

Vehicle will sometimes turn over, but not start

Based on your description, it sounds like your 2007 Mercedes GL450's fuel pump may be randomly shutting off. This can be due to a malfunctioning powertrain control module as the repair shop told you. This can also be related to...

Related articles

How to Buy a Good Quality Door Latch
There There comes a time in every car door’s life when the latch just doesn’t catch the way it used to. Age, weather, lack of lubrication, and repeated opening and closing take their toll on this little metal mechanism, leading...
How Can I Prevent Door Seals From Leaking?
When When your car door seals leak, it’s more than just a passing nuisance. Water damage can occur to your interior, necessitating the replacement of upholstery or other components. In nearly every instance of leaking car door seals, which you...
How to Buy a Good Quality Door Latch
There There comes a time in every car door’s life when the latch just doesn’t catch the way it used to. Age, weather, lack of lubrication, and repeated opening and closing take their toll on this little metal mechanism, leading...