2015 Mercedes-Benz SLK350 Speedometer Isn't Working

Speedometer Malfunction in 2015 Mercedes-Benz SLK350: Causes and Fixes

Find Repair Location
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 2015 Mercedes-Benz SLK350 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 isn't working on a 2015 Mercedes-Benz SLK350?

When faced with a non-functioning speedometer in your 2015 Mercedes-Benz SLK350, 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 straightforward and common issue that can easily be resolved. 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. Following this, examine the wiring connections linked to both the speedometer and speed sensor, ensuring they are secure and free from corrosion, as poor connections can disrupt functionality. Utilizing a diagnostic scanner to check for error codes can provide further insights into the problem, helping you identify any underlying issues. If these initial steps do not resolve the problem, consider testing the speedometer cluster itself to determine if the issue lies within its components. By following this structured approach, you can effectively diagnose and address the speedometer issue in your vehicle, saving time and potentially costly repairs.

What are the common causes for a non-functioning speedometer in a 2015 Mercedes-Benz SLK350?

When dealing with a non-functioning speedometer in a 2015 Mercedes-Benz SLK350, it's essential to understand the common problems 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, electrical issues such as blown fuses or wiring problems can disrupt the speedometer's operation, making it crucial to check the vehicle's electrical system. Another potential issue is a malfunction within the instrument cluster itself, where a faulty gauge or display can prevent the speedometer from functioning correctly. Furthermore, the vehicle speed sensor plays a vital role in providing accurate speed readings, and if it malfunctions, it can cause erratic behavior or total failure of the speedometer. Lastly, a damaged or broken speedometer cable can also hinder the speedometer's ability to display speed accurately. For those looking to tackle this issue themselves, a thorough inspection of these components can help identify the root cause and guide the necessary repairs.

How urgent is it to repair the non-functioning speedometer in a 2015 Mercedes-Benz SLK350?

Repairing a non-functioning speedometer in a 2015 Mercedes-Benz SLK350 is an urgent matter that should not be overlooked. The legal ramifications of driving without a working speedometer can lead to fines or penalties, making it essential to ensure compliance with traffic laws. Moreover, the safety risks associated with an inaccurate speed reading cannot be understated; a malfunctioning speedometer can hinder your ability to gauge your speed accurately, increasing the likelihood of accidents. Additionally, a faulty speedometer may signal deeper issues within your vehicle's systems, potentially leading to more significant and costly repairs if left unaddressed. Lastly, for those considering resale, a non-functioning speedometer can deter potential buyers and diminish your vehicle's value. Therefore, addressing this issue promptly is crucial for maintaining safety, compliance, and the overall integrity of your vehicle.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.