2014 Mercedes-Benz CLS63 AMG S Window Won't Go Up Or Down

Fixing Window Malfunctions in 2014 Mercedes-Benz CLS63 AMG S

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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 2014 Mercedes-Benz CLS63 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 2014 Mercedes-Benz CLS63 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 the window malfunction in a 2014 Mercedes-Benz CLS63 AMG S?

To effectively diagnose a window malfunction in your 2014 Mercedes-Benz CLS63 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 easiest fix; ensure it is responsive and securely connected. Next, inspect the fuses related to the window system, as a blown fuse can disrupt functionality and is straightforward to replace. If these initial checks do not resolve the issue, proceed to test the window motor by listening for operational sounds when the switch is activated; a silent motor may indicate a need for replacement. Following this, examine the window regulator, which is crucial for the window's movement; look for any visible damage or wear that could impede its function. Lastly, inspect the wiring connected to both the motor and regulator, as damaged or loose connections can lead to malfunctions. By following this diagnostic approach, you can efficiently identify the root cause of the window issue and determine the necessary repairs.

What are the common causes for the window not functioning in a 2014 Mercedes-Benz CLS63 AMG S?

When dealing with a non-functioning window in a 2014 Mercedes-Benz CLS63 AMG S, it's essential to understand the common problems that could be at play. One of the primary culprits is a faulty window regulator, which is responsible for the mechanical movement of the window and can wear out over time, leading to operational issues. Additionally, a defective window motor may prevent the window from responding to commands, as it powers the regulator. Electrical issues, such as a blown fuse or a malfunctioning window switch, can also disrupt functionality, making it crucial to check these components first. If the window switch is faulty, replacing it might be necessary to restore operation. Furthermore, physical issues like the window being off track or misaligned can hinder movement, requiring adjustments to ensure smooth operation. By systematically addressing these potential problems, you can effectively troubleshoot and resolve the window issue in your vehicle.

How urgent is it to fix the window malfunction in a 2014 Mercedes-Benz CLS63 AMG S that won't go up or down?

Addressing a window malfunction in your 2014 Mercedes-Benz CLS63 AMG S is not just a matter of convenience; it is an urgent necessity that impacts your safety and security. A window that fails to operate can hinder your ability to escape in an emergency, posing a significant risk to your well-being. Additionally, a window that cannot close properly leaves your vehicle vulnerable to theft and environmental damage, exposing the interior to rain, snow, and extreme temperatures. This not only compromises the comfort of passengers but can also lead to costly repairs down the line. Furthermore, in modern vehicles, such malfunctions may be indicative of underlying electrical issues that, if left unaddressed, could escalate into more severe problems. Therefore, it is crucial to prioritize the repair of your window malfunction to ensure the safety, security, and longevity of your vehicle.

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