If your Mercedes-Benz window won’t go up all the way but only goes up a little every time you press the window switch, the problem is easy to fix. The window circuit is protected and controlled by SAM and window modules on a newer vehicle. If your Mercedes-Benz window and seats don’t work, check the fuse for the door control module. The window motor runs via the door control module, which should have a fuse. You will not find a use dedicated to the widows on newer Mercedes-Benz models. The window fuse will either be in the engine bay’s main fuse box or on the dashboard’s side. On older Mercedes-Benz, you should have a fuse for the windows. If you open the door and the window operates properly, there is a high chance that one or more wires are cut or damaged near the door hinge. You may have a broken wire inside the accordion rubber piece between the door and frame of the car. The wire harness that goes from the door to the body can get damaged. Once you jump-start the car and the engine runs, the window should go up and down without any issues. To fix this problem, start the engine or use a jump box to jump-start it if necessary. If the battery in your Mercedes-Benz is partially discharged, the window will go up very slowly and then stop. Note that the window motor will need to be removed it can be reused and doesn’t have to be replaced. The recommended method to fix this problem is to remove the door panel and replace the window regulator. Some models, such as the C-Class W203 and ML-Class W163, have a small plastic on the window regulator that breaks. If your Mercedes-Benz window won’t go up and you hear grinding noise when you try to operate the window, the problem is usually the window regulator. Eventually, the window motor fails, and the window won’t go up or down. If you haven’t operated the windows, it may go up once, but if you try again, the window won’t go up. You won’t be able to raise it or lower it.Ī window motor will sometimes work intermittently. Once the window motor fails, the window will not operate in either direction. The window motor on Mercedes-Benz can prevent the window from going up and down. By going to the door module and looking at the data stream, you will press the window switch and see if the door module picks it up. Window switch operation can be diagnosed with a Mercedes-Benz scanner. If you don’t hear the window move up or down when you press the switch, the problem can be the switch itself. If the window switch is the problem, the power window may not move or work only in one direction. The window switch on the driver’s door may fail. Typically the door control module has a 40A fuse which can blow if there is a short or a bad window or seat motor. Check the fuse for the door control module as well. If your window doesn’t go up or down due to software issues, you will need to visit a Mercedes-Benz dealer and ask them to update the software versions for the door control module. On some models, such as S-Class and W221, the window module software may get corrupted and require an update. The module itself can fail and may need replacement. The door control module on a Mercedes-Benz is the main unit that controls the windows and seats. Here are some of the most common problems that prevent a Mercedes-Benz window from working correctly. The window goes down but not up, or vice versa.The window only moves a little and then stops.
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