Mercedes-Benz GLC63 AMG Speedometer Isn't Working

Common Causes of Speedometer Malfunctions in Your Mercedes-Benz GLC63 AMG and How to Fix Them

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Reviewed by
Andrew Hajjar
Written by RepairPal Car Genius
Updated January 14, 2025
0%
35% chance it's the
Vehicle Speed Sensor (VSS)
0%
28% chance it's the
Speedometer
0%
23% chance it's the
Electrical Issue
0%
14% chance it's
Something else
The most common reasons a Mercedes-Benz GLC63 AMG speedometer isn't working are the vehicle speed sensor (VSS), a faulty speedometer, or an electrical issue.
  • Vehicle Speed Sensor (VSS): A faulty vehicle speed sensor can result in inaccurate speed readings and erratic transmission shifting.
  • Speedometer: A faulty speed sensor or a broken connection in the speedometer circuit can result in inaccurate speed readings.
  • Electrical Issue: A blown fuse or a short circuit in the wiring can cause various electrical issues in the vehicle's systems.
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.

Troubleshooting Speedometer Issues in a Mercedes-Benz GLC63 AMG

When troubleshooting speedometer issues in your Mercedes-Benz GLC63 AMG, start by checking the Vehicle Speed Sensor (VSS), as this component is often the root cause of speedometer malfunctions. Inspect the sensor for any visible damage or disconnections, and ensure that it is securely connected. If the VSS appears to be functioning correctly, the next step is to examine the speedometer gauge itself for any signs of failure. Sometimes, electrical issues can lead to erratic speedometer behavior, so it’s wise to inspect the wiring and connections, particularly those near the gearbox, for corrosion or loose connections. Cleaning the contacts of both the speedometer gauge and the sensors can also help restore proper function. If these initial checks do not resolve the issue, consider the possibility of a more complex problem, such as a malfunctioning dashboard display or driver information system, especially if you notice intermittent failures in colder weather. By following this diagnostic approach, you can systematically identify and address the underlying cause of your speedometer issues, ensuring a smoother driving experience.

Troubleshooting Speedometer Issues in a Mercedes-Benz GLC63 AMG

When facing speedometer issues in your Mercedes-Benz GLC63 AMG, it's essential to understand the common problems that could be at play. One of the primary culprits is the Vehicle Speed Sensor (VSS), which plays a crucial role in relaying speed information to the speedometer. If the VSS is malfunctioning, it can lead to inaccurate readings or a complete failure of the speedometer. Additionally, the speedometer itself may be faulty, which can manifest as erratic behavior or a total lack of response. Electrical issues, such as poor connections or damaged wiring, can also disrupt the signal between the VSS and the speedometer, leading to problems. A practical DIY approach includes inspecting and cleaning the contacts of the speedometer gauge and the sensors, as well as checking the connections near the gearbox for any signs of wear or corrosion. In colder weather, some drivers have reported that the dashboard may not activate properly, even when other systems are functioning, which could indicate a temporary electrical issue that resolves after a few starts. By systematically checking these areas, you can often pinpoint the source of the problem and take steps toward a solution before seeking professional help.

Why is the Speedometer Not Working in a Mercedes-Benz GLC63 AMG?

When the speedometer in your Mercedes-Benz GLC63 AMG stops functioning, it is crucial to address the problem promptly, as neglecting it can lead to serious safety risks and further vehicle damage. A malfunctioning speedometer can impair your ability to gauge your speed accurately, increasing the likelihood of speeding violations and accidents. Additionally, the underlying causes, such as a faulty vehicle speed sensor or electrical issues, may affect other critical systems in your vehicle, potentially leading to more extensive repairs down the line. Therefore, it is essential to conduct a thorough inspection of the speedometer and related components, including the vehicle speed sensor and wiring, to identify the root cause of the issue. By taking immediate action, you not only ensure your safety on the road but also protect your vehicle's overall performance and longevity.

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Mercedes-Benz GLC63 AMG Speedometer Issues: Causes & Repairs