2005 Mercedes-Benz CLK320 Cruise Control Isn't Working

Fixing Cruise Control Issues in the 2005 Mercedes-Benz CLK320

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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 2005 Mercedes-Benz CLK320 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 2005 Mercedes-Benz CLK320 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 initial diagnostic steps to troubleshoot the non-functional cruise control in a 2005 Mercedes-Benz CLK320?

When faced with a non-functional cruise control in your 2005 Mercedes-Benz CLK320, it's crucial to adopt a systematic diagnostic approach. Start by checking the cruise control fuse, as a blown fuse is a common and easily fixable issue that can halt the system's operation. Next, inspect the cruise control switch located on the steering wheel; ensure it is functioning correctly, as malfunctions here can directly impact cruise control engagement. Additionally, examine the brake pedal switch, since a faulty switch can prevent the cruise control from activating. It's also important to verify the vehicle speed sensor's condition, as this component is vital for the cruise control system to operate effectively. Finally, consider scanning the vehicle's onboard computer for any error codes that may provide insights into the underlying issues. By following these steps, you can methodically diagnose and potentially resolve the cruise control problem, making your DIY troubleshooting efforts more efficient and effective.

What are the common problems that could cause the cruise control to stop working in a 2005 Mercedes-Benz CLK320?

When the cruise control in your 2005 Mercedes-Benz CLK320 stops functioning, 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 is crucial for the cruise control system as it disengages the cruise when the brake pedal is pressed. If this switch is malfunctioning, it may prevent the cruise control from engaging at all. Another potential issue is related to the speed sensor; if this component is not providing accurate speed readings, the cruise control will not operate correctly. Additionally, vacuum leaks can disrupt the system's ability to maintain a steady speed, leading to erratic behavior or complete failure. A defective cruise control module can also be a significant factor, as it controls the overall functionality of the system. Lastly, electrical problems, such as blown fuses or damaged wiring, can impede the cruise control's operation. By systematically checking these components, you can identify and resolve the issues affecting your cruise control system, allowing you to enjoy a smoother driving experience once again.

How urgent is it to address the non-functioning cruise control in a 2005 Mercedes-Benz CLK320?

When it comes to the non-functioning cruise control in a 2005 Mercedes-Benz CLK320, addressing the issue should not be overlooked, even if it may not seem urgent at first glance. Cruise control enhances the driving experience by allowing drivers to maintain a consistent speed, which is particularly beneficial during long trips or highway driving. While the absence of this feature may not compromise the vehicle's safety or drivability, it can lead to frustration and discomfort during extended drives. Moreover, neglecting the problem could result in more significant issues down the line, as underlying mechanical or electrical faults may worsen over time. Therefore, it is wise to prioritize the repair of the cruise control system to ensure a smoother driving experience and to mitigate the risk of incurring more costly repairs in the future. Taking prompt action not only restores convenience but also helps maintain the overall health of your vehicle.

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Troubleshooting Cruise Control Issues 2005 Mercedes CLK320