Mercedes-Benz C220 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your Mercedes-Benz C220 and How to Fix Them

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Reviewed by
Aisha
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
0%
20% chance it's
Something else
The most common reasons a Mercedes-Benz C220 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 C220 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 C220

When troubleshooting cruise control issues in a Mercedes-Benz C220, it's essential to adopt a systematic diagnostic approach that begins with the simplest potential fixes before delving into more complex problems. Start by checking the basics, such as the fuse related to the cruise control system, as a blown fuse can often be the culprit behind malfunctioning features. Next, inspect the brake light and brake switch, since a faulty brake light can inadvertently disable the cruise control. If these components are functioning correctly, move on to examining the wheel speed sensor and electronic throttle actuator, as these parts are critical for the cruise control's operation. If the cruise control module is suspected, consider sourcing a replacement from a salvage yard or attempting to re-solder the existing module if you possess the necessary skills. Additionally, keep an eye on any warning messages displayed on the instrument cluster, as they can provide valuable insights into underlying issues, including engine-related problems that may affect cruise control functionality. By following this structured approach, you can effectively identify and resolve the issues affecting your cruise control system.

What Could Cause the Cruise Control to Malfunction in a Mercedes-Benz C220?

When dealing with cruise control malfunctions in a Mercedes-Benz C220, it's essential to understand the common problems that could be at play. One frequent culprit is a faulty wheel speed sensor, which can disrupt the system's ability to maintain speed. Additionally, issues with the electronic throttle actuator may lead to erratic behavior or complete failure of the cruise control. The control module itself can also fail, along with potential sensor or switch problems that affect throttle actuation. If the throttle position sensor is malfunctioning, it may cause the engine's computer to overcompensate, resulting in black exhaust emissions. Other factors to consider include a defective brake pedal switch, a dead battery, or a malfunctioning ABS wheel speed sensor, all of which can hinder cruise control functionality. Interestingly, improper tire placement during balancing can also lead to cruise control issues, highlighting the importance of correct tire installation. Lastly, be aware of error messages such as "cruise control and speedtronic inoperative," which can indicate deeper underlying problems. By diagnosing these common issues accurately, DIY enthusiasts can effectively troubleshoot and resolve cruise control malfunctions in their Mercedes-Benz C220.

Why is the Cruise Control Not Working in a Mercedes-Benz C220?

When the cruise control in your Mercedes-Benz C220 fails, it’s crucial to address the issue promptly to avoid potential safety hazards and further mechanical complications. A malfunctioning cruise control system can stem from various sources, including a failed control module, sensor, or switch, which can disrupt your driving experience and lead to erratic vehicle behavior. Additionally, problems with throttle actuation or a defective brake pedal switch can compromise your ability to maintain a steady speed, increasing the risk of accidents. Ignoring these symptoms may not only result in more significant repair costs down the line but could also lead to dangerous driving conditions, especially on highways where cruise control is often utilized. Therefore, if you notice any signs of malfunction, it is advisable to consult a professional service team to diagnose and rectify the issue before it escalates into a more serious problem.

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