Tilting power sunroof problems can be many. This is particularly true on roof mechanisms that have not received proper lubrication over the years. One of the first things that can fail is the power sunroof cable. The spiral worm drive end of the cable will strip out due to the excessive strain put on it by a binding or slow moving sunroof. Sunroof cable removal and replacement is something you can do yourself.
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Kent uses the example of on his own 300SDL to first show you how to troubleshoot a sunroof cable problem. See how he fights to remove a damaged cable from his car as well as an example of how easy it is to remove and replace a good cable from a motor drive that is working properly. He goes over the procedure for driving the cable manually from inside the trunk, talks about some of the other problems you may run into related to a damaged cable, and then shows you how to test the sunroof manually BEFORE replacing a cable.
He wraps the video up by talking about lubricating and installing the replacement cable. You might be surprised to learn that installation can be a real fight if you don't know a few tricks. Once the cable is installed you may have to perform some final adjustments. Those adjustments are covered in the final part of this on demand video workshop series.
PLEASE NOTE: In order to remove the cable you will have to remove the headliner panel under the sunroof. That procedure is not covered in this video. If you are not familiar with how to get the inside panel out please see part 1 in this video series.
This is part 3 of a 5 part series fully covering all aspects of diagnosing and repairing faulty power tilting sunroofs on Mercedes Benz passenger cars produced from 1986 to 1995. To view the full descriptions of the other videos in this series click on the links below:
Part 5 - Operational Fine Tuning and Adjustment
Related Repair Details NOT included: Sunroof panel removal, motor repair and removal and adjustment procedures are NOT covered in this video
Chassis/Models Used in Production: 1986 300SDL
Applies to the Following Chassis/Models: 1986 to 1995 W201, W124, W126, and W140.
Total Run Time: 14:11 Minutes
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Important note: This video manual may or may not include all the information you will need to troubleshoot and/or repair your specific problem/s. Please read the full description carefully to determine if this video is applicable to your year and model and contains the information you are looking for. If not, please refer back to our "Solutions Finder" and enter your chassis number and the specific problem you are having to see if we offer a solution.
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Tilting Sunroof Part 1: Sunroof Panel Removal and Replacement - On Demand Video
Removing the tilting sunroof panel is a little bit of a mystery to many owners. Since there are no exposed fasteners, at first glance it can appear to be very difficult to remove.
Tilting Sunroof Part 2: Tilting Mechanism Service and Repair - On Demand Video
This is part 2 of a 4 part video series Kent has done on repairing the power tilting sunroofs on the W201 W126 and W124 chassis built from 1986 to 1995. Part 1 covers removal and replacement of the sunroof panel and headliner.
Tilting Sunroof Part 4: Motor Drive Assembly Removal, Service and Repair - On Demand Video
Kent explains why it is important to to remove and open up the motor assembly anytime you are replacing a damaged cable. On the bench he explains the workings of the motor and transmission and shows close up examples of what each of the different components do.
Tilting Sunroof Part 5: Final Height and Travel Adjustments - On Demand Video
Adjusting the power tilting sunroof is not difficult if you have the right knowledge and a couple alignment pin tools. Adjustment is not usually needed if the sunroof is working properly.
Sunroof Air Dam Removal and Replacement - On Demand Video
In this video Kent covers the removal and replacement procedures for the sunroof air dam or otherwise known as the air deflector. Using a special technique and a plastic trim tool can prevent damage to the plastic clips. He also covers troubleshooting the reasons for improper operation.