2005 Mercedes-Benz E55 AMG Cruise Control Isn't Working

Fixing Cruise Control Issues in 2005 Mercedes-Benz E55 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 2005 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 2005 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.

The cruise control switch can cause complete failure of the cruise control feature, but in a lucky scenario only partial functionality will be lost. This means that the cruise control may come on, but that it will not increase in speed automatically, or the cancel button does not work leading the driver to cancel cruise control with the foot brake. In some vehicles, the cruise control light may illuminate, or a warning message may be displayed due to lack of functionality.

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 initial diagnostic steps to troubleshoot the non-functional cruise control in a 2005 Mercedes-Benz E55 AMG?

When troubleshooting the non-functional cruise control in a 2005 Mercedes-Benz E55 AMG, it's essential to adopt a systematic diagnostic approach. Start by checking the cruise control fuse in the fuse box, as a blown fuse can often be the simplest fix. Next, ensure that the cruise control settings are correctly configured and activated, as incorrect settings can prevent the system from engaging. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into any underlying issues within the vehicle's onboard computer. Following this, inspect the cruise control switch located on the steering wheel for any signs of damage or malfunction, as this component is crucial for operation. Additionally, verify the brake pedal switch, since a faulty switch can inadvertently disable the cruise control system. Finally, assess the vehicle speed sensor, which is vital for the cruise control to function correctly. By methodically working through these steps, you can effectively diagnose and potentially resolve the cruise control issue in your Mercedes-Benz E55 AMG.

What are the common problems that could cause the cruise control to stop working in a 2005 Mercedes-Benz E55 AMG?

When the cruise control in a 2005 Mercedes-Benz E55 AMG ceases to function, several common issues may be at play. One of the primary culprits is a faulty brake light switch, which can prevent the system from engaging properly by failing to signal when the brake pedal is pressed. Additionally, problems with the speed sensor can lead to inaccurate speed readings, causing the cruise control to malfunction or disengage unexpectedly. Another potential issue is vacuum leaks within the system, which can disrupt the cruise control's ability to maintain a constant speed. A defective cruise control module may also be responsible, as it can hinder the system's responsiveness to commands. Lastly, electrical problems, such as blown fuses or wiring issues, can significantly impact the operation of the cruise control system. By understanding these common problems, DIYers can effectively troubleshoot and potentially resolve the issues affecting their vehicle's cruise control functionality.

How urgent is it to address the non-functioning cruise control in a 2005 Mercedes-Benz E55 AMG?

Addressing the non-functioning cruise control in a 2005 Mercedes-Benz E55 AMG should not be overlooked, even if it may not seem as urgent as other mechanical failures. While the immediate safety risks may be minimal, neglecting this issue can lead to a less enjoyable driving experience and increased driver fatigue on long journeys. The cruise control system is designed to enhance comfort and efficiency, and its absence can make driving more cumbersome. Furthermore, delaying repairs could result in more complex issues arising, potentially leading to higher repair costs and greater inconvenience in the future. Therefore, it is advisable to prioritize the repair of the cruise control system to maintain the vehicle's functionality and ensure a smooth driving experience.

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2005 Mercedes-Benz E55 AMG Cruise Control Issues & Solutions