2011 Mercedes-Benz R350 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2011 Mercedes-Benz R350 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 2011 Mercedes-Benz R350 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 2011 Mercedes-Benz R350 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 2011 Mercedes-Benz R350?

To effectively diagnose the non-functioning cruise control in your 2011 Mercedes-Benz R350, start with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Begin by inspecting the cruise control fuse, as a blown fuse is a common and easily fixable issue that can halt the system's operation. Next, examine the cruise control buttons on the steering wheel to ensure they are responsive and not stuck, as this can also lead to functionality problems. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into any underlying issues within the vehicle's onboard computer. Additionally, verify the performance of the speed sensors, as they are essential for the cruise control system to engage properly. Don’t overlook the brake and clutch switches, which must function correctly to prevent the cruise control from being disabled as a safety precaution. Finally, inspect the wiring and connections associated with the cruise control system for any signs of damage or corrosion, as faulty wiring can disrupt the necessary signals. By following this structured diagnostic approach, you can efficiently identify and address the root cause of the cruise control malfunction.

What are the common problems that could cause the cruise control to stop working in a 2011 Mercedes-Benz R350?

When troubleshooting the cruise control system in a 2011 Mercedes-Benz R350, it's essential to consider several common problems that could be at play. One of the primary culprits is a faulty cruise control switch, which can hinder the system's ability to engage or disengage as intended. Additionally, issues with the speed sensor can disrupt the system's functionality, preventing it from maintaining a steady speed. Another frequent issue arises from a malfunctioning brake light switch; if this switch fails, it may cause the cruise control to disengage unexpectedly whenever the brakes are applied. Furthermore, problems with the throttle actuator can lead to erratic cruise control behavior, making it difficult to maintain a consistent speed. Lastly, electrical problems such as wiring issues or blown fuses can significantly impact the cruise control system's performance. For those looking to tackle these issues themselves, it's crucial to methodically diagnose each component to identify the root cause of the malfunction, ensuring a safe and effective repair.

How urgent is it to address the non-functioning cruise control in a 2011 Mercedes-Benz R350?

Addressing a non-functioning cruise control in a 2011 Mercedes-Benz R350 is crucial for both safety and vehicle performance. While it may seem like a minor inconvenience, a malfunctioning cruise control can signal deeper electronic issues that could compromise the vehicle's overall functionality. Ignoring this problem not only risks driver fatigue on long journeys but may also lead to increased fuel consumption, as the driver may need to constantly adjust speed manually. Furthermore, a faulty cruise control system could be indicative of larger mechanical or electronic failures that, if left unchecked, could escalate into more significant and costly repairs. Therefore, it is essential to diagnose and repair any cruise control issues promptly to maintain the vehicle's safety and reliability, ensuring a smooth and secure driving experience.

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