2013 Mercedes-Benz S350 Speedometer Isn't Working

Fixing the Non-Functional Speedometer in a 2013 Mercedes-Benz S350

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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 2013 Mercedes-Benz S350 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 steps to diagnose a non-functioning speedometer in a 2013 Mercedes-Benz S350?

To effectively diagnose a non-functioning speedometer in a 2013 Mercedes-Benz S350, begin with the simplest solution by checking the fuse associated with the speedometer in the fuse box, as a blown fuse can often be the culprit. If the fuse is intact, proceed to inspect the speed sensor located on the transmission, ensuring it is neither faulty nor disconnected, as this component is crucial for relaying speed data. Next, examine the wiring connections to both the speed sensor and the speedometer for any loose or damaged wires that could disrupt the signal. If these components appear to be in good condition, utilize a diagnostic scanner to check for any error codes that may indicate underlying issues with the speedometer or its sensor system. Finally, if all previous checks yield no results, the problem may reside within the speedometer cluster itself, which may require testing or replacement. By following this structured approach, you can systematically identify and address the issue with your speedometer.

What are the common problems that could cause the speedometer to stop working in a 2013 Mercedes-Benz S350?

When the speedometer in a 2013 Mercedes-Benz S350 ceases to function, it can be frustrating, but understanding the common problems can help you diagnose the issue effectively. One of the primary culprits is a faulty speed sensor, which is responsible for relaying speed information to the speedometer; if it malfunctions, you may experience erratic or no readings. Another potential issue is a broken speedometer cable, which can disrupt the connection necessary for accurate speed display. Additionally, problems within the instrument cluster itself can lead to speedometer failure, as this is where the speedometer is housed. It's also worth checking for a blown fuse in the vehicle's electrical system, as this can interrupt the power supply to the speedometer. Lastly, the vehicle speed sensor, which communicates directly with the speedometer, may need replacement if it is found to be faulty. By familiarizing yourself with these common problems, you can take the first steps toward troubleshooting and potentially resolving the speedometer issue on your own.

How urgent is it to repair the non-functioning speedometer on a 2013 Mercedes-Benz S350?

Repairing the non-functioning speedometer on a 2013 Mercedes-Benz S350 is not just a matter of convenience; it is a critical safety concern that demands immediate attention. A malfunctioning speedometer can lead to inaccurate speed readings, increasing the risk of speeding and potential accidents. Moreover, neglecting this issue can exacerbate underlying problems with the vehicle's speed sensor, wiring, or instrument cluster, resulting in more extensive and costly repairs down the line. By addressing the speedometer issue promptly, you not only ensure your safety on the road but also protect your vehicle from further damage, ultimately saving time and money in the long run. Therefore, it is essential to prioritize the repair of your speedometer to maintain both your safety and the integrity of your vehicle.

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