2002 Mercedes-Benz E55 AMG Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2002 Mercedes-Benz E55 AMG 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 2002 Mercedes-Benz E55 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 2002 Mercedes-Benz E55 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.

What are the initial diagnostic steps to troubleshoot the non-functional cruise control in a 2002 Mercedes-Benz E55 AMG?

When troubleshooting the non-functional cruise control in a 2002 Mercedes-Benz E55 AMG, it's essential to adopt a systematic diagnostic approach. Begin by checking the cruise control fuse located in the fuse box, as a blown fuse is a straightforward issue that can easily disrupt functionality. Next, inspect the cruise control switch on the steering wheel to ensure it is operational; a malfunctioning switch can prevent the system from engaging. Following this, examine the brake pedal switch, which is crucial since the cruise control disengages when the brake is applied. If these components are functioning correctly, use a diagnostic scanner to check for any error codes that may indicate deeper issues within the system. Additionally, verify the vehicle speed sensor, as it plays a vital role in maintaining speed; any inaccuracies here can affect cruise control performance. Lastly, inspect the wiring and connections associated with the cruise control system for any signs of damage or looseness, as faulty wiring can lead to signal disruptions. By methodically following these steps, you can effectively diagnose and potentially resolve the cruise control issue in your vehicle.

What are the common problems that could cause the cruise control to stop working in a 2002 Mercedes-Benz E55 AMG?

When dealing with cruise control issues in a 2002 Mercedes-Benz E55 AMG, it's essential to understand the common problems that may arise. One frequent culprit is a faulty brake light switch, which can prevent the cruise control from engaging by failing to signal when the brake pedal is pressed. Additionally, speed sensor malfunctions can disrupt the system, as accurate speed readings are crucial for proper operation. Another issue to consider is vacuum leaks, which can interfere with the cruise control's ability to maintain a steady speed, leading to unexpected disengagement. A defective cruise control module may also be at fault, causing difficulties in both engagement and speed maintenance. Lastly, electrical problems, such as blown fuses or wiring issues, can significantly impact the cruise control system's functionality. By identifying and addressing these common problems, DIYers can effectively troubleshoot and restore the cruise control system to working order.

How urgent is it to repair the non-functioning cruise control in a 2002 Mercedes-Benz E55 AMG?

When evaluating the urgency of repairing the non-functioning cruise control in a 2002 Mercedes-Benz E55 AMG, it is essential to recognize the implications of neglecting this issue. While it may not seem like an immediate emergency, the absence of cruise control can significantly impact driving safety and comfort. Without this feature, drivers may experience increased fatigue during long trips, leading to distractions that could heighten the risk of accidents. Additionally, a malfunctioning cruise control system might indicate deeper electronic problems within the vehicle, which, if left unaddressed, could escalate into more severe and costly repairs. Furthermore, maintaining all vehicle functions, including cruise control, is crucial for preserving the car's resale value; potential buyers often look for well-maintained features. Therefore, while the repair may not be urgent, it is advisable to prioritize it to ensure a safer, more comfortable driving experience and to protect the vehicle's long-term integrity.

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2002 Mercedes-Benz E55 AMG Cruise Control Issues & Repairs