2006 Mercedes-Benz R500 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2006 Mercedes-Benz R500 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
0%
25% chance it's the
Control Module
0%
25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 2006 Mercedes-Benz R500 cruise control isn't working are failed control module, sensor or switch issues, or throttle actuation problems.
  • Sensor: A faulty sensor can lead to incorrect readings, causing issues with engine performance or triggering warning lights on the dashboard.
  • Control Module: A faulty control module can result in 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 acceleration and poor engine 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 2006 Mercedes-Benz R500 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.

What are the steps to diagnose the non-functioning cruise control in a 2006 Mercedes-Benz R500?

To effectively diagnose the non-functioning cruise control in a 2006 Mercedes-Benz R500, it's essential to adopt a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by examining the cruise control switch, as this is often the primary culprit. Utilizing a Mercedes scan tool can provide valuable insights by allowing you to monitor live data from the steering column control unit, confirming whether the system recognizes inputs from the switch. Next, inspect the brake pedal switch, which is crucial for cruise control operation; a malfunction here can prevent the system from engaging. Additionally, ensure that the vehicle's battery is in good condition, as a dead or weak battery can disrupt electrical systems, including cruise control. It's also important to check the ABS wheel speed sensor, as any faults here can interfere with the cruise control's functionality. Finally, verify that the brake lights are operational, as any issues with the brake light bulbs can signal to the cruise control system that the brakes are engaged, thereby disabling the feature. By following this structured diagnostic approach, you can efficiently identify and address the underlying issues affecting your cruise control system.

How urgent is it to address the non-functioning cruise control in a 2006 Mercedes-Benz R500?

When it comes to the non-functioning cruise control in a 2006 Mercedes-Benz R500, understanding the urgency of the situation is crucial for any DIY enthusiast. While cruise control may not be a critical component for vehicle operation, its malfunction can impact your driving comfort, especially during long trips or highway driving. If the issue stems from common culprits like a blown fuse, a defective brake pedal switch, or a faulty ABS wheel speed sensor, addressing these problems sooner rather than later can restore functionality and enhance your overall driving experience. Although the immediate safety risk may be low, neglecting the repair could lead to complications with other critical systems, such as the brake lights or engine performance, which could escalate into more significant issues and costly repairs. Therefore, while it may not be an emergency, taking timely action to fix the cruise control can prevent further complications and ensure a smoother, more enjoyable ride.

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2006 Mercedes-Benz R500 Cruise Control Issues & Repairs