Mercedes-Benz C280 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your Mercedes-Benz C280 and How to Fix Them

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Reviewed by
Andrew Hajjar
Written by RepairPal Car Genius
Updated January 14, 2025
0%
30% chance it's the
Sensor
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25% chance it's the
Control Module
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25% chance it's the
Throttle
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20% chance it's
Something else
The most common reasons a Mercedes-Benz C280 cruise control isn't working are failed control module, sensor or switch issues, or throttle actuation problems.
  • Sensor: A faulty or malfunctioning sensor can lead to incorrect readings, causing issues with engine performance or other systems relying on accurate data.
  • Control Module: A faulty control module can lead to erratic vehicle behavior or failure of various electronic systems due to improper signal processing.
  • Throttle: A faulty throttle body or a defective accelerator pedal position sensor may be causing inconsistent throttle response.
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.

How much does it cost to fix a Mercedes-Benz C280 cruise control isn't working?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

In the event that a wheel speed sensor fails, the ABS, traction control system (TCS) and manufacturer specific stability control system lights will illuminate, informing the driver that the systems are disabled. The vehicle will be more prone to tire slip, and normal driving patterns may need to be adjusted to correct for the loss of computer control. On older vehicle's, the speedometer can be affected, causing illumination of the check engine light as well.

Troubleshooting Cruise Control Issues in a Mercedes-Benz C280

When troubleshooting cruise control issues in your Mercedes-Benz C280, begin by checking the most accessible components. Start with the fuses in the fuse box, as a blown cruise control fuse can easily disrupt functionality. Next, inspect the multi-function relay located behind the fuse box, as this can also affect the system's operation. If these components are functioning correctly, turn your attention to the brake system; a malfunctioning brake light or switch can inadvertently disable the cruise control. Ensure that the brake system is in good working order, as it plays a critical role in the cruise control's operation. Additionally, keep an eye on any engine-related warning lights, as issues like a check engine light can signal problems that may impact cruise control functionality. If you encounter a cruise control inoperative warning message on your dashboard, it’s essential to address these potential issues methodically. While some of these checks can be performed at home, don’t hesitate to seek professional assistance if the problem persists, as a trained technician can provide a more thorough diagnosis and repair.

What Could Cause the Cruise Control to Malfunction in a Mercedes-Benz C280?

When dealing with cruise control malfunctions in a Mercedes-Benz C280, it's crucial to understand the common problems that may arise. One of the primary culprits is a failed control module, which can disrupt the entire cruise control system. Additionally, issues with sensors, such as a faulty wheel speed sensor or electronic throttle actuator, can lead to erratic behavior or complete failure of the cruise control functionality. Another frequent issue is a defective brake pedal switch, which can inadvertently signal the system to disengage. It's also worth checking the vehicle's battery, as a dead battery can affect electronic systems, including cruise control. Furthermore, a malfunctioning ABS wheel speed sensor can contribute to the problem. A practical first step in troubleshooting is to inspect the cruise control fuse to ensure it is intact. By systematically addressing these potential issues, DIYers can effectively diagnose and resolve cruise control malfunctions in their Mercedes-Benz C280, restoring the convenience and safety of this essential driving feature.

Why is the Cruise Control Not Working in a Mercedes-Benz C280?

When the cruise control in your Mercedes-Benz C280 is not functioning, it is crucial to address the issue without delay. Ignoring symptoms such as unresponsive controls or sudden disengagement can pose significant safety risks, especially during long drives where maintaining speed is essential. A malfunctioning cruise control system may indicate underlying problems, such as a failed control module, a blown fuse, or issues with the brake pedal switch, which could affect your vehicle's overall performance. Additionally, if the problem stems from the throttle control system or ABS, it could lead to more severe damage if left unresolved. Furthermore, an ESP error can disable cruise control, often linked to faulty sensors that, if neglected, may compromise your vehicle's safety features. Therefore, diagnosing and fixing the root cause of the cruise control failure is not just about convenience; it is a vital step in ensuring your vehicle operates safely and efficiently.

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