2008 Mercedes-Benz CLK63 AMG Cruise Control Isn't Working

Fixing Cruise Control Issues in 2008 Mercedes-Benz CLK63 AMG

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Reviewed by
Andrew Hajjar
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 2008 Mercedes-Benz CLK63 AMG 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 2008 Mercedes-Benz CLK63 AMG 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.

A faulty cruise control module will simply result in deactivation of cruise control settings. This is because a detected error in the cruise control system could lead to hazardous driving conditions, so the module will be disabled, and the cruise control system warning light will be displayed. This will be a different message depending on make and model, and a warning light or message may be displayed on the driver instrument cluster.

What are the steps to diagnose the cruise control issue in a 2008 Mercedes-Benz CLK63 AMG?

When diagnosing a cruise control issue in a 2008 Mercedes-Benz CLK63 AMG, it's crucial to follow a methodical approach that prioritizes simpler checks before delving into more complex diagnostics. Begin by examining the cruise control fuse, as a blown fuse can easily disrupt the system's operation. Next, inspect the cruise control switch on the steering wheel, since a malfunctioning switch is a common source of problems. If these initial steps do not uncover the issue, utilize a diagnostic scanner to retrieve any error codes from the vehicle's onboard computer, which can help pinpoint specific malfunctions. Additionally, check the speed sensors, as they are vital for the cruise control system's functionality. It's also essential to thoroughly inspect the wiring and connections related to the cruise control system for any signs of damage or corrosion, as faulty wiring can hinder signal transmission. Finally, if all other avenues have been explored, test the cruise control module to ensure it is operating correctly. By adhering to this structured diagnostic process, you can effectively identify and resolve the underlying issues affecting the cruise control system in your CLK63 AMG.

What are the common problems that could cause the cruise control to stop working in a 2008 Mercedes-Benz CLK63 AMG?

When the cruise control in your 2008 Mercedes-Benz CLK63 AMG ceases to function, it can be frustrating, but understanding the common problems can help you diagnose the issue effectively. One of the primary culprits is a faulty brake light switch, which may fail to signal the system when the brake pedal is pressed, thereby preventing cruise control from engaging. Additionally, issues with the speed sensor can disrupt the system's ability to maintain a steady speed, leading to its malfunction. Another potential problem is vacuum leaks within the engine, which can adversely affect the cruise control's operation. Furthermore, a defective cruise control module may also be responsible for the system's failure to work as intended. Lastly, electrical problems, such as blown fuses or wiring issues, can interfere with the cruise control's functionality. By systematically checking these components, you can identify and resolve the issues affecting your cruise control system, allowing for a smoother driving experience.

How urgent is it to address the non-functioning cruise control in a 2008 Mercedes-Benz CLK63 AMG?

Addressing the non-functioning cruise control in your 2008 Mercedes-Benz CLK63 AMG should not be overlooked, even if it may seem like a minor inconvenience. While the absence of this feature does not directly compromise the safety or drivability of your vehicle, it can significantly detract from your overall driving experience, especially during long trips where maintaining a steady speed is beneficial. Ignoring this issue could lead to more complex problems down the line, as the underlying cause of the malfunction may worsen over time. For DIY enthusiasts, it is crucial to understand that a timely inspection can save you from costly repairs in the future. Therefore, while it may not be an immediate emergency, taking proactive steps to diagnose and repair the cruise control system will enhance your vehicle's functionality and ensure a more enjoyable driving experience. If you're not comfortable tackling the repairs yourself, consulting a qualified mechanic or authorized service center is advisable to ensure a proper diagnosis and resolution.

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2008 Mercedes-Benz CLK63 AMG Cruise Control Issues