2022 Mercedes-Benz GLS450 Speedometer Isn't Working

Fixing Speedometer Issues in the 2022 Mercedes-Benz GLS450

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Reviewed by
Aisha
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 2022 Mercedes-Benz GLS450 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.

What are the initial diagnostic steps to take when the speedometer of a 2022 Mercedes-Benz GLS450 isn't working?

When faced with a non-functioning speedometer in a 2022 Mercedes-Benz GLS450, it's essential to adopt a systematic diagnostic approach. Begin by checking the fuse associated with the speedometer in the fuse box, as a blown fuse is a common and easily fixable issue. Next, inspect the speed sensor, which plays a crucial role in relaying speed data; any signs of damage or malfunction here could be the culprit. Utilizing a diagnostic scanner to check for error codes can provide insights into any electronic issues affecting the speedometer. Additionally, examine the wiring connections for any loose or corroded areas that might disrupt the signal. If these steps do not yield results, testing the speedometer cluster itself can help determine if the problem lies within the unit. Should these initial diagnostics fail to resolve the issue, seeking assistance from a professional mechanic or an authorized service center is advisable to ensure a thorough and accurate diagnosis. By following this structured approach, you can effectively troubleshoot the speedometer problem and take the necessary steps toward a solution.

What are the common problems that could cause the speedometer to stop working in a 2022 Mercedes-Benz GLS450?

When troubleshooting a non-functional speedometer in a 2022 Mercedes-Benz GLS450, it's essential to consider several common issues that may be at play. One of the primary culprits is a faulty speed sensor, which can lead to inaccurate readings or a complete failure of the speedometer. Additionally, problems within the instrument cluster itself can disrupt the speedometer's operation, making it crucial to inspect this component. Electrical issues, such as blown fuses or wiring problems, can also impact the speedometer's functionality, so checking the vehicle's electrical system is advisable. Furthermore, a malfunctioning vehicle speed sensor can hinder communication between the engine control module and the speedometer, resulting in erratic behavior. Lastly, damaged or corroded wiring connected to the speedometer can cause inconsistent readings or total failure. By understanding these potential issues, DIYers can better diagnose and address speedometer problems in their vehicle.

How urgent is it to address the malfunctioning speedometer in a 2022 Mercedes-Benz GLS450?

When it comes to a malfunctioning speedometer in your 2022 Mercedes-Benz GLS450, the urgency to address the issue cannot be overstated. Ignoring this problem can lead to serious safety risks, as inaccurate speed readings may cause you to unknowingly exceed speed limits, increasing the likelihood of accidents. Additionally, driving with a faulty speedometer can expose you to legal repercussions, such as fines or penalties, should law enforcement stop you for speeding. Beyond safety and legal concerns, a malfunctioning speedometer can affect your vehicle's overall performance, potentially leading to more significant mechanical issues down the line. Furthermore, if you plan to sell your vehicle in the future, unresolved speedometer problems can diminish its resale value, as prospective buyers may be wary of purchasing a car with known issues. Therefore, it is crucial to prioritize the inspection and repair of your speedometer to ensure your safety, compliance with the law, optimal vehicle performance, and to protect your investment.

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