2018 Mercedes-Benz S560 Speedometer Isn't Working

Fix speedometer issues in your 2018 Mercedes-Benz S560

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Reviewed by
Devin Cabugcal
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 2018 Mercedes-Benz S560 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 2018 Mercedes-Benz S560?

To effectively diagnose a non-functioning speedometer in a 2018 Mercedes-Benz S560, begin with the simplest potential issue: the fuse. Locate the vehicle's fuse box and check for any blown fuses that may be linked to the speedometer. If the fuse is intact, proceed to inspect the speed sensor, which is crucial for relaying speed data to the speedometer. Look for any visible damage or signs of malfunction. Next, examine the wiring connections associated with the speedometer; ensure they are secure and free from corrosion, as poor connections can disrupt the signal. If these components appear to be in good condition, utilize a diagnostic scanner to check for any error codes that could indicate underlying issues with the speed sensor system. Finally, if all previous checks yield no results, the problem may reside within the speedometer cluster itself, which may require professional testing or repair. By following this structured approach, you can systematically identify and address the cause of your speedometer's malfunction.

What are the common problems that could cause the speedometer to stop working in a 2018 Mercedes-Benz S560?

When the speedometer in a 2018 Mercedes-Benz S560 ceases to function, several common problems 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, issues within the instrument cluster itself can disrupt the speedometer's operation, making it essential to check for any signs of malfunction in this component. Electrical problems, such as blown fuses or damaged wiring, can also interfere with the speedometer's functionality, so inspecting the vehicle's electrical system is crucial. Furthermore, a malfunctioning vehicle speed sensor can contribute to speedometer failure, as it directly affects the readings displayed. Lastly, software glitches within the vehicle's computer system may impact the speedometer's performance, necessitating a diagnostic check to identify and resolve any underlying software issues. For those looking to tackle this problem themselves, understanding these potential causes is the first step toward effective troubleshooting and repair.

How urgent is it to repair the non-functioning speedometer in a 2018 Mercedes-Benz S560?

Repairing a non-functioning speedometer in a 2018 Mercedes-Benz S560 is an urgent matter that should not be overlooked. The speedometer is not just a convenience; it is a critical component for legal compliance, as driving without a functioning speedometer can lead to fines and legal repercussions. Moreover, safety is paramount; a malfunctioning speedometer compromises your ability to gauge speed accurately, increasing the risk of accidents and unsafe driving practices. Additionally, the speedometer's failure may signal deeper issues within the vehicle's systems, potentially leading to more significant damage if left unaddressed. Lastly, for those considering resale, a fully operational speedometer is a key feature that enhances the vehicle's value. Therefore, addressing this issue promptly is essential for ensuring a safe, compliant, and valuable driving experience.

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