2020 Mercedes-Benz C63 AMG S Window Won't Go Up Or Down

Resolve 2020 Mercedes-Benz C63 AMG S window issues effectively

Find Repair Location
Reviewed by
Bo Fader
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 2020 Mercedes-Benz C63 AMG S 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 2020 Mercedes-Benz C63 AMG S 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 are the steps to diagnose a non-functioning window in a 2020 Mercedes-Benz C63 AMG S?

To effectively diagnose a non-functioning window in your 2020 Mercedes-Benz C63 AMG S, begin with a systematic approach that prioritizes simpler solutions before delving into more complex issues. Start by checking the window switch, as a malfunctioning switch is often the simplest explanation for window failure. If the switch appears to be operational, proceed to inspect the fuse box for any blown fuses that could disrupt power to the window system. Next, test the window motor to ensure it is receiving power and functioning correctly; a faulty motor can prevent the window from moving. If the motor is operational, examine the window regulator for any signs of damage or wear, as this component is crucial for the window's movement. Additionally, inspect the wiring connected to the window system for loose connections or frayed wires that may hinder functionality. If these steps do not resolve the issue, it may be time to consult a professional mechanic or an authorized Mercedes-Benz service center for a comprehensive diagnosis and repair. This methodical approach not only saves time but also helps in identifying the root cause of the problem efficiently.

What are the common problems that could cause the window of a 2020 Mercedes-Benz C63 AMG S to stop working?

When the window of your 2020 Mercedes-Benz C63 AMG S stops functioning, it can be frustrating, but understanding the common problems can help you diagnose the issue effectively. One of the primary culprits is a faulty window regulator, which is responsible for the movement of the window. If this component fails, the window may not move up or down as intended. Another potential issue could be a defective window motor; if the motor is not operational, the window will not respond to the switch commands. Additionally, electrical problems such as blown fuses or wiring issues can disrupt the window's operation, making it essential to check the electrical system. A malfunctioning window switch can also be the reason behind the window's failure to operate, so testing this component is crucial. Lastly, if the window has come off its track, it may become misaligned, preventing it from functioning properly. By systematically checking these areas, you can identify the specific problem and take the necessary steps to restore your window's functionality.

How urgent is it to repair the malfunctioning window in a 2020 Mercedes-Benz C63 AMG S?

When it comes to a malfunctioning window in your 2020 Mercedes-Benz C63 AMG S, the urgency of repair cannot be overstated. A window that fails to operate correctly can compromise your safety by obstructing visibility and affecting the vehicle's aerodynamics, which is crucial for performance. Additionally, an open or malfunctioning window increases the risk of theft, leaving your vehicle vulnerable to break-ins. Beyond safety and security, a malfunctioning window can expose the interior to harsh weather conditions, leading to potential damage from rain or extreme temperatures, which can degrade the upholstery and electronics over time. Furthermore, since modern vehicles rely heavily on electronic systems, a window malfunction may signal underlying electrical issues that could escalate if not addressed promptly. Therefore, it is essential to prioritize the repair of a malfunctioning window to ensure the continued safety, security, and functionality of your vehicle.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.