Question about 2001 Mercedes-Benz C-Class

1 Answer

Fuel door won't lock when doors lock? - 2001 Mercedes-Benz C-Class

Posted by on

1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert who has answered 20 questions.


    An expert that has over 10 points.


    An expert whose answer got voted for 2 times.

  • Contributor
  • 23 Answers

Check for faulty vacum cell at fuel flap or broken vacum pipe. vacum pump inside boot on side under side cover.

Posted on Aug 26, 2009

4 Suggested Answers

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

  • 45 Answers

SOURCE: power door locks, electric fuel door and power

let me assume u have not checked the fuses, meaning in al places the fuses are!, try,under the hood,under the dash and behind the panel behind the rear seat in the trunk, look in your owners manual for these locations and the particular fuse u have trouble with. good luck,hope we helped!

Posted on Mar 09, 2009

  • 239 Answers

SOURCE: just bought 318ti compact when using remote to

You may have some burnt out door lock solenoids.

Posted on Sep 03, 2009

  • 117 Answers

SOURCE: Windows won't go up our down power door locks

My first concern is that if these things are all just now happening at once, your battery may have become so weak, it's just unable to fulfill your request...

I would highly recommend checking all your fueses as well as any Maxi fuses under the hood, not just the fuses panels under the dash... If your'e lucky a fuse may be sitting tilted in the socket or simply burning out.

It could be helpful to know if anything has been done to alter teh cars wiring, such as a new stereo or speakers or amplifier being installed as it may have been done improperly. That is to say if this is a recent problem that has begun to happen, or each of these things have been going out for awhile...

I'm sure many will suggest you may have a short in your wiring... That may be true and can be a long tedious task to track down and isolate...

So, I strongly urge you to consider a NEW BATTERY. Clean Battery Cables, making sure there is no corrosion (That could cause all these things) And be sure to check all fuses. That means pulling them and visially inspecting them to make sure they are not burnt or broken.

On that note, I have replaced fuses that looked fine and the problems went away... Keep in mind how some if not many or even all of those are possibly 10 years old... They are a cheap fix... Even if you replaced each and everyone.

If you have a Keyfob that is not unlocking, locking arming the car whatever, Consider also changing the battery in it at a minimum of once a year. I think it is recommended every 6 months. But that is usually dependant on use.

If all the fuses are good and you have installed a new battery and these things are not working, you could be looking at the actual window lift motor going out and even the door lock switch burning out. Some things you can have tested and others are typically cheap enough to replace. But I would investigate looking into these, having them tested, prior to chasing a fantom wire short, which may or may not be present at all...

Even buying a second hand part at a U-pull it can be quicker, cheaper and easier verification process than chasing a short which may not be...

Good Luck to you and Happy Motoring...


Posted on Jun 11, 2011

Testimonial: "Thanks I'll try your advice "

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Fuel door won't open on a 2008 g8 pontiac

Fuel Fill Door Description and Operation
The fuel door latch actuator shares the circuit with the driver door latch assembly. The body control module (BCM), upon receipt of a lock switch lock or unlock signal, will switch the appropriate door lock actuator, as well as a fuel filler door release actuator control circuits to battery positive voltage. The opposing side of the door lock and fuel filler door release actuators is connected to ground by the I/P fuse block through the other door lock actuator control circuit and the doors, along with the fuel filler door release, will lock or unlock as commanded.
Circuit/System Testing
  1. Ignition OFF, disconnect the harness connector at the fuel door release actuator.
  2. Test for less than 1 ohm between the control circuit terminal 1 and ground.
  3. ?‡'
    If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance.

  4. Test for less than 1 ohm between the control circuit terminal 2 and ground.
  5. ?‡'
    If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance.

  6. Connect a test lamp between the control circuit terminal 1 and control circuit terminal 2.
  7. Ignition ON, command the doors to LOCK and UNLOCK by using the door lock switch. The test lamp should illuminate while commanding the LOCK and UNLOCK states.
  8. ?‡'
    If the test lamp remains OFF during either command, test either control circuit for a short to ground.

  9. If all circuits test normal, test or replace the fuel door release actuator.
Component Testing
  1. Ignition OFF, disconnect the harness connector at the fuel door release actuator
  2. Install a 15A fused jumper wire between the control terminal 1 and 12V. Momentarily install a jumper wire between the control terminal 2 and ground. The fuel door release actuator should perform the LOCK/UNLOCK function.
  3. ?‡'
    If the function does not perform as specified, replace the fuel door release actuator.

  4. Reverse the jumper wires. The fuel door release actuator should perform the UNLOCK/LOCK function.
If the function does not perform as specified, replace the fuel door release actuator.

Remove the rear compartment side trim (right) panel. Refer to
Rear Compartment Side Trim Panel Replacement .

Apr 06, 2016 | Pontiac Cars & Trucks

1 Answer

Nissan 1990 pathfinder doors won't unlock

Door locks are powered through a circuit breaker (location not indicated) which applies 12V to the door lock timer. Insertion of the key causes the door lock actuator to unlock the door ...unless the timer prevents it. It is doubtful that all the doors could have failed lock components

Oct 15, 2012 | 1990 Nissan Pathfinder

1 Answer

My doors won't lock

You will have to take the door panels off of each of the doors and see what is preventing the latch to lock the doors, whether its just missing the lock or something is broken in the lock mechanism

Jul 06, 2012 | 2004 Pontiac Grand Prix

1 Answer

Fuel door won't open

Fixed. In the glove box there is a vallet button. I pushed it and now my trunk and fuel door work. and what this has to do with my trunk and fuel door not functioning , I have no idea. Hope this helps someone else.

Apr 05, 2012 | 1998 Cadillac DeVille

1 Answer

The doors will not lock or unlock from the door but will from the remote?

The title suggest the door won't unlock unless the remote is used but during the summer it was the inverse. If while inside the car the doors will not lock or unlock from the door but will from the remote then you have a faulty switch.If while outside the car the key turns while in the lock but the door won't lock or unlock then the linkage at the end of the lock is faulty. You'll need to remove the door inside plate to check this.


Dec 07, 2011 | 2004 Infiniti FX45

1 Answer

2006 chev.colora the door lock on the front right side won`t work

Common for the door lock solenoid to go bad and your going to need to replace it. You may hear it clicking but it's to weak for it to lock and unlock the door.
Thank you for using fixya and good luck

Apr 26, 2010 | 2006 Chevrolet Colorado

Not finding what you are looking for?
2001 Mercedes-Benz C-Class Logo

Related Topics:

162 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mercedes-Benz Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22114 Answers


Level 3 Expert

75797 Answers

Michael Contreras
Michael Contreras

Level 2 Expert

166 Answers

Are you a Mercedes-Benz Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides