Question about 1998 Mercedes-Benz M-Class

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Need help with sunroof that won't fully close. Need someone experienced with MB ML series

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  • gardsimms Jul 12, 2010

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Try the INITIALIZATION PROCEDURE  If the sun roof is not working.
If the sunroof does not close or open automatically, use the following procedure to return sunroof operation to normal. 
1. Close the sunroof if it is not in the closed position. It may be necessary to repeatedly push the switch to close the sunroof. 
2. Press and hold the TILT UP switch the sunroof will tilt up. Release the button. 
3. Press and hold the TILT UP switch again. Do not release the switch, keep pressure on it. After 4 seconds of depressing, the sunroof will full close. 
4. Initializing procedure is complete. Confirm proper operation of the sunroof (slide open, slide close, tilt up,tilt down.) 
But If the above mentioned steps are not helping to make the sunroof work then 
disconnect the car battery for a minute or two, then after reconnecting the battery Try the same procedure as mentioned above.

But if this procedure is not making any difference then the problem is electrical.the wires connected to the sunroof motor needs to be checked.If the wires are checked OK then the the motor must be faulty.Check for the short in wires by continuity tester and voltage to the motor by meter. It will show 12 volts at the motor.Also check for any blockage in the sunroof way from where it moves up and down.Also check the  wind deflector  if its blocking the roof to get completely close.To confirm its not deflector problem.Remove the deflector and check closing the roof.Remove the deflector, the arms, and retaining clips.Then check.They block the roof . if the arms and the clips are  either rusted away or cracked.
For the most part all Factory Sunroofs that have a Front Mechanical Sunroof Deflector are 
Dependent on the Sunroof Glass or Outer Sunroof Panel to Raise or Lower The Sunroof Deflector.
The Factory Wind Deflector Arms are spring loaded in many cases, Rust over Time, Debris like :Leaves, Egg Corns, Just plain Dirt & Dust will cause a lot of problems, but most of the time its lack of maintenance.

Over a period of time the "ARMS" will either weaken from "AGE" & "HEAT" or cause the Sunroof Not to Close properly.
When you open the Outer Panel so the Panel retracts back into the Sunroof Cartridge and then again comes forward you will find the Outer Panel and the Factory Sunroof Deflector in the Front Meet Head on and wont allow you to Close the Sunroof.
The Factory Wind Deflectors are really not effective enough to really make a difference within the Cabin of your car. If your looking for a True Wind Deflector with no Mechanical part to get in the way of the outer Sunroof Panel make sure you purchase one that uses Stainless Steel Clips that anchor just under the Metal Lip of the Opening of your Sunroof. No Rust Issues with Stainless Parts.

Another thought to consider if your Sunroof Still wont Close and your lost for options you can always remove the Sunroof Motor from the Sunroof Cassette, this will do several things Good and perhaps not so Good.
1)Removing the Sunroof Motor from The Cassette will release the Sunroof Cables, you can now reach up and manually pull or push close your Sunroof assuming their are no broken parts lodged on or in the Sunroof Tracks. Once closed make sure you re-install the Sunroof Motor back into the hole to lock the Sunroof Cables from moving.

Thanks. Keep updated for any more query. You can rate this solution and show your appreciation

Posted on Jul 11, 2010


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How do you reset sunroof in a 2001 Monte Carlo with 3400 model I

check fuse and relay if good than possible motor ot track problem their should be a mechanical bypass that will let you close it if stuck open the following information is courtesy of monte carlo forum
To check the condition of your original sunroof guides:
  1. Gl*** in closed position.
  2. Locate & remove 3 torx bolts on each side of sunroof glass. Lift glass out of sunroof opening & set aside in a safe place.
  3. Locate "J" shaped cover plate at front of sunroof track assembly. Remove 2 torx bolts from each cover plate.
  4. Lift up bracket to remove.
  5. Inspect the plastic guides on each side. The sunroof cables attach to guides on front outer corner. Inspect this area closely for damage.
  6. Do not operate the sunroof with the J plates removed.
If the sunroof guides are not broken & the glass is a uniform height along the rear edge your problem may be a stripped gear inside the motor. The motor has a manual override:
  1. Get access to the motor by removing the map light/switch console or lowering the front of the headliner.
  2. Insert a large standard screwdriver into the nylon bushing at the center of the motor hub. Push up & turn the screwdriver to manually move the sunroof glass. If the unit will fully open & close manually, you most likely only need a replacement motor.

If your sunroof is stuck in the open position follow these steps to get it closed:
  1. Remove the glass.
  2. Try to close the unit without the glass. Many times one side will still be operational and close correctly.
  3. Try to slide the inoperable lift arm forward. If it moves, slide it forward until it stops.
  4. You now need to slide the original plastic guide forward to lower the arm to the closed position. Using a standard screwdriver, push it forward. The lift arm should begin to lower.
  5. If the lift arm will still not fully lower, remove the J plate as explained above, sometimes the sunroof cable will need to be lifted up to allow the guide to fully slide forward.
  6. Reinstall glass.

May 21, 2016 | Cars & Trucks

1 Answer

2001 cadillac deville sunroof open and want close

Check the RAP fuse in the rear fuse box , this fuse powers the sunroof control module ! Fuse Block - Rear , Left rear of the passenger compartment, under the rear seat .
The sunroof module contains the logic for the opening and the closing of the sunroof. The sunroof motor assembly contains the reversible DC drive motor, the gear train, and the limit switch.
The sunroof module determines the sunroof motor direction based on inputs received from the overhead console sunroof switches. When the ignition switch is in the ON position or when retained accessory power (RAP) is active, voltage is applied to the sunroof module via the RAP relay. For a description and operation of the RAP system, refer to Retained Accessory Power (RAP) Description and Operation in Retained Accessory Power. The sunroof module controls the sunroof motor direction by changing the polarity of the applied voltage. The sunroof module remembers the sunroof position whenever the ignition switch is turned to the OFF position. The limit switch is used as an input to the sunroof module to indicate that the glass is fully closed, or in the comfort stop positions. The limit switch is grounded when the sunroof glass is in the fully closed or comfort stop positions, otherwise it is open.
The SLIDE CLOSE mode is initiated by moving and holding the sunroof slide switch (ROOF) forward. This applies a ground provided from the sunroof limit switch low reference circuit to the sunroof switch close vent signal input of the sunroof module. The sunroof module controls voltage to the control circuits of the sunroof motor. The sunroof motor will run until the limit switch contacts are closed. The closing of the limit switch will apply the sunroof limit switch low reference circuit to the sunroof limit switch soft stop signal circuit to the sunroof module, indicating the flush closed position has been reached. As the sunroof is approaching the close position the sunroof glass will force the wind deflector downward.
You need to have a factory scan tool hooked up an have it checked for DTC'S in the sunroof control module ! a code reader will not do this , a code reader will only check the engine codes for OBD 2 .
Important: The following must be completed before using the symptom tables.
  1. Perform Diagnostic System Check - Power Sunroof in order to verify that all of the following are true:
  2. ?€¢
    No DTCs are set.

    The control modules can communicate via the serial data link.

  3. Review the system operation in order to familiarize yourself with the system functions. Refer to Sunroof Description and Operation
your better off taking to the dealer !

May 09, 2015 | 2001 Cadillac DeVille

1 Answer

How do you replace the sunroof motor on a 2004 Subaru Forester

Just out of curiosity, is it the motor that is faulty or one of the guides has broken? what are the symptoms you are experiencing?
IF you have a diagnosis and it is in fact the motor, here's how you replace it.
1. Fully close the sunroof glass, disconnect batt negative.
2. Remove Roof trim
3. disconnect Motor harness
4. Remove sunroof motor mounting screw and nut.
After installing the new motor you have to reset the sunroof motor.

A tip to help diagnose if you are just guessing for inop motor
(1) Check fuse for blow-out.
(2) Check switch for improper function.
(3) Check motor for incorrect terminal voltage.
(4) Check relay for improper operation.
(5) Check poor grounding system.
(6) Check harness for open or short and terminals for poor connections.
(7) Check limit switch for improper operation.

Aug 02, 2014 | 2004 Subaru Forester

1 Answer

How do I eliminate the loud wind noises coming through closed sunroof? I have a 2002 Holden Vx Ss Series 2 Commodore

sounds like you need new rubber seals, but first, open the roof, and with a damp cloth, clean dirt off the inside rubbers, then close roof most of the way and clean around the edge of the glass/metal, which ever it is. Then close it fully and see if there are any tiny gaps. Does it leak water ? Red.

Apr 04, 2014 | Cars & Trucks

1 Answer

2000 Tahoe sunroof won't fully close

Is there any debris in the track of the window especially towards the front. Thew clicking sound you are hearing may be worn gears in the drivve assembly of the window/power roof mechanism. Is there a limit switch for the sunroof? This may be bad also. Check the easy stuff first and get back with me.

Feb 01, 2013 | 1999 Chevrolet Tahoe

1 Answer

Sunroof on 1998 chevy cavalier z24 won't close all the way

It can be faulty motor or loose wiring issue or faulty /weak sunroof controlling switch or there is some blockage for sunroof to come down to close or sunroof out of its track the headliner is out of its way.There re many possibilities.All this basics needs to be checked.For further troubleshooting,go through this help link:----
Click the link mentioned below:------
How to Manually Close the Sunroof ?

Sunroof Stuck open?

How to manually close Sunroof on Navigator?

This will help.

Jun 05, 2012 | Chevrolet Cavalier Cars & Trucks

1 Answer

Sunroof won't close

take a multimeter and check that your getting power to the switch and from it to the actuator when pressed. also check fuses and wires for bad/loose ground or short/bare wires

Dec 31, 2011 | 2006 Chevrolet HHR

1 Answer

2005 mazda 3 sunroof

H Kim -

The "gearbox" is unfortunately under the headliner with no easy access. If you are also experiencing a clicking sound when the motor is activated, the regulator track had slipped position and will need to be reset.

I have been through this problem twice now. The first time the motor / gearbox came loose from it's mounts, began slipping (click, click,click), very nasty sound. I remounted the motor with threadlock on the screws, but alas.. two years later (mine's 2006) it slipped again.. I don't know why yet, I need to drop the headliner once more and have a look. If you would like a copy of your FSM, drop me a line.

Here's the RESET procedure from the FSM, absolutely gospel, no other way to fix it:
Sunroof Motor Assembly Note: Note • If the guide is removed, initial position setting of the sunroof motor will be required. After installing the sunroof unit, perform initial position setting using the following procedure. 1. Press the TILT UP switch to fully tilt up the glass panel.
2. When the glass panel reaches the fully tilt up position, temporarily release the TILT UP switch and press it again for approx. 13 s continuously. Continue pressing the switch until the glass panel automatically stops at the fully tilt up position after reaching the mechanical lock position.
3. When the glass panel stops at the fully tilt up position, temporarily release the TILT UP switch, then press it again within 5 s and hold.
Note • Press the TILT UP switch continuously until the glass panel opens to the fully open position, returns to the fully closed position and then stops. 4. Release the TILT UP switch when the glass panel stops at the fully closed position.

ALSO, Here's the clearance adjustment specs for having the glass panel in the correct resting position:

1. Fully close the glass panel.
2. Measure the gap and height difference between the glass panel and the body.
3. Loosen the glass panel installation screws and move the glass panel to adjust.

Standard clearance a: 0.2-2.2 mm {0.008-0.08 in} b: 0 mm {0 in} 4. Tighten the screws.
5. Insert any available thin plastic card between the weatherstrip and the body, and verify that they are sealed. (There is resistance when the plastic card is moved.)

• If they are not sealed, perform Steps 3-4 and adjust again.

Aug 31, 2009 | 2001 Mazda Tribute

1 Answer

The back sunroof on my X3 will not shut. The front one closes and then reopens because the back one won't close. The sunroof won't even openfrom front to back.

press and hold the sunroof button, the sunroof will open and close (full cycle) then stop, this resets the sunroof system, hope this helps. let me know

Aug 10, 2008 | 1986 BMW 3 Series

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