Skip the auto shop - Our mechanics make house calls

Q: Automatic door locking system issue

asked by on

My car has an automatic door locking system. Lately, it started malfunctioning. I had a fuse replaced and now it works but only intermittently. How can I fix this permanently?

A: A Mercedes of your model year use a combina...

A Mercedes of your model year use a combination electric/vacuum door lock system. The fuse was for the electrically powered vacuum pump only. The rest of system uses rubber vacuum lines which leak when old. You can replace them one at a time as they fail or leak, or all at once - a more expensive, but one-time repair. A YourMechanic professional can help diagnose the locks and repair this problem.

Was this answer helpful?

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: Starts and Stalls and runs for a few minutes only ( Car ran out of Fuel but ran good for 3 days afterward ) 1985 BMW 635

Congratulation on your "Shark" - love the old 6-series! Check your engine coolant temperature sensor (the one for the injection, not the gauge), and the wiring to it. If it is sending a "too cold" signal to the engine, the...

Q: 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...

Q: Car revs in drive, doesn't move.

With the car warm parking brake set and in park (automatic) neutral (manual shift) while on level ground check the transmission fluid level, it should be within the hashmarks. If it's low this could be your problem, the amount of...

Related articles

How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
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...
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.