2018 Mercedes-Benz GLS63 AMG Window Won't Go Up Or Down

Common Causes of Window Malfunctions in Your 2018 Mercedes-Benz GLS63 AMG and How to Fix Them

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Reviewed by
Devin Cabugcal
Written by RepairPal Car Genius
Updated January 14, 2025
0%
36% chance it's the
Fuse, Relay or Electrical System
0%
20% chance it's the
Window Motor
0%
24% chance it's the
Window Regulator
0%
20% chance it's
Something else
The most common reasons a 2018 Mercedes-Benz GLS63 AMG window won't go up or down are window's electrical system such as a fuse or relay, a broken window motor, or a broken window regulator.
  • Fuse, Relay or Electrical System: A blown fuse or a faulty relay can disrupt the electrical circuit, causing components to fail or operate intermittently.
  • Window Motor: A faulty window motor or a broken window regulator can prevent the window from moving up or down properly.
  • Window Regulator: A faulty window regulator can cause the window to become stuck or operate erratically due to worn gears or a broken cable.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 2018 Mercedes-Benz GLS63 AMG window won't go up or down?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

If the door window motor fails, the window may not open or close, or it may operate intermittently. Traditionally, problems with power windows were caused by faulty switches or electrical wiring - especially the wires running between the door and the vehicle body that are subjected to repeated flexing. In these cases, the window might operate intermittently when the door is opened and closed. While this may still be the case on newer cars, it is increasingly common to find window motor problems that originate with a control module. Still, the switches and wiring should be checked thoroughly before replacing a window motor.

If one of the windows in a vehicle will not open or close properly, a failing door window regulator might be the cause. A window that is moving intermittently, or one that gets stuck on the way up or down, could also indicate a broken regulator. Other symptoms might include a clicking, chattering, or grinding noise when the window moves. In some cases a severely damaged window regulator could cause the window to drop inside the door.

When a switch can not make contact and close the circuit, the window cannot be raised and lowered. If the switch on the driver's door will not raise or lower the window in question, but the switch on the corresponding door works just fine, this is a good indication that there is a switch failure. This works the other way around, as well. If the switch on the door does not cause the window to function, but the driver's switch does, that is an indication of a passenger door window switch failure.

Due to the nature of electrical systems on modern vehicles, the range of problems these can cause are nearly limitless. However, there is a way to categorize them in two ways. Permanent and intermittent problems. Permanent problems appear and remain. This may be the vehicle will not start, the radio does not work, or the door chime will not turn off among many, many others. These problems are more straight-forward to diagnose since they present themselves at all time. This means there will always be a fault to find. Intermittent electrical problems, however, can be difficult or impossible to locate, since they appear then disappear without warning. The best case scenario for an intermittent issue is when replicating the problem is easily accomplished and understood. This allows a technician to make an issue semi-permanent, allowing them to find the fault. Other issues that come and go without warning and cannot be replicated on demand must occur when the technician is servicing the vehicle, otherwise there is no problem to correct. It is most important to understand that electrical system faults always require inspection, and can include the vehicle working in any manner, or not working at all.

Like we noted in the last section, general diagnosis symptoms are the most vague of the bunch. There are several diagnostic spectrums, electrical diagnosis, drivability diagnostics, engine diagnostics, transmission diagnostics, and the list could continue for about 5 or 10 more spectrums of diagnostics. The most important take-away here, is that general diagnostics are diagnostics that have no other spectrum in which they fit, or the problem is unknown. This means that any vehicle left outside of a repair facility with the keys and an authorization to perform diagnosis will be diagnosed under the general diagnosis spectrum.

What steps should I take to diagnose the window issue in my 2018 Mercedes-Benz GLS63 AMG?

To effectively diagnose a window issue in your 2018 Mercedes-Benz GLS63 AMG, it's essential to adopt a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by examining the window switch, as a malfunction here can often be the primary culprit behind window operation failures. If the switch is functioning correctly, proceed to inspect the fuse linked to the window system; a blown fuse can easily disrupt the window's ability to operate. Next, test the window motor, which is vital for the window's movement, to confirm it is working as intended. If the motor is operational, turn your attention to the window regulator, checking for any signs of damage or malfunction, since this component plays a crucial role in the window's functionality. Additionally, ensure there are no obstructions in the window track, as debris can frequently impede movement. Lastly, inspect the wiring connected to the window system for any signs of damage or loose connections, as faulty wiring can also lead to operational issues. By following this structured diagnostic process, you can effectively identify and resolve the window problem in your vehicle.

What are the common problems that could cause the window in a 2018 Mercedes-Benz GLS63 AMG to stop working?

When dealing with a window that has stopped functioning in a 2018 Mercedes-Benz GLS63 AMG, it's essential to understand the common problems that could be at play. One of the primary culprits is the window regulator, which is crucial for the movement of the window; if it fails, the window may become stuck or unresponsive. Another potential issue is the window motor, which powers the window's movement; a malfunction here can prevent the window from responding to any commands. Additionally, electrical problems such as blown fuses, damaged wiring, or a faulty switch can disrupt the window's operation, making it vital to check these components. A malfunctioning window switch itself can also be the reason behind the window's failure to operate. Lastly, if the window has come off its track, it may not move smoothly or could become completely stuck. By systematically checking these areas, DIYers can effectively diagnose and address the issue, restoring functionality to the window.

How urgent is it to address the window malfunction in a 2018 Mercedes-Benz GLS63 AMG that won't go up or down?

Addressing a window malfunction in your 2018 Mercedes-Benz GLS63 AMG is not just a matter of convenience; it is a pressing concern that requires immediate attention. A window that won't go up or down can significantly compromise your safety while driving, as it may obstruct your visibility or leave your vehicle vulnerable to external threats. Additionally, if the window is stuck in the open position, it exposes the interior to harsh weather conditions, which can lead to discomfort for passengers and potential damage to upholstery and electronics. Furthermore, an open window increases the risk of theft, making your vehicle an easy target for opportunistic criminals. Ignoring these symptoms could also indicate deeper electrical issues within the vehicle, which may escalate into more costly repairs if not addressed promptly. Therefore, it is crucial to take action as soon as you notice any window malfunction to ensure the safety, security, and longevity of your vehicle.

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2018 Mercedes-Benz GLS63 AMG Window Issues & Repair Costs