2014 Mercedes-Benz SL65 AMG Cruise Control Isn't Working

Diagnosing Common Issues with Cruise Control in Your 2014 Mercedes-Benz SL65 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 2014 Mercedes-Benz SL65 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 2014 Mercedes-Benz SL65 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 steps to diagnose the cruise control issue in a 2014 Mercedes-Benz SL65 AMG?

To effectively diagnose cruise control issues in your 2014 Mercedes-Benz SL65 AMG, start with the simplest checks to rule out common problems. Begin by inspecting the cruise control fuse; a blown fuse can easily disrupt the system's functionality. Next, examine the cruise control buttons on the steering wheel to ensure they are operational, as faulty buttons can prevent the system from engaging. If these initial checks do not reveal the issue, utilize a diagnostic scanner to identify any error codes from the vehicle's onboard computer, which can provide insights into specific malfunctions. Additionally, verify the functionality of the vehicle speed sensor, as it is essential for the cruise control system to operate correctly. Finally, conduct a thorough inspection of the wiring and connections associated with the cruise control system, looking for any signs of damage or corrosion that could impede performance. By following this structured approach, you can systematically identify and address the root cause of the cruise control problem.

What are the common problems that could cause the cruise control to stop working in a 2014 Mercedes-Benz SL65 AMG?

When troubleshooting the cruise control system in a 2014 Mercedes-Benz SL65 AMG, it's essential to understand the common problems that may lead to its malfunction. One prevalent issue is a faulty speed sensor, which can disrupt the system's ability to accurately gauge the vehicle's speed, preventing the cruise control from engaging or maintaining speed effectively. Additionally, problems with the brake light switch can pose significant challenges, as this switch is crucial for disengaging the cruise control when the brake pedal is pressed; a malfunction here can result in the system not functioning as intended. Another potential culprit is the throttle actuator, which regulates the engine's throttle opening; if it malfunctions, the cruise control may struggle to maintain a steady speed. Furthermore, a defective cruise control module can hinder communication between various system components, leading to operational failures. Lastly, electrical issues such as wiring problems or blown fuses can also impede the cruise control's functionality. By identifying and addressing these common issues, DIY enthusiasts can take steps toward restoring the cruise control system to proper working order.

How urgent is it to address the non-functioning cruise control in a 2014 Mercedes-Benz SL65 AMG?

Addressing a non-functioning cruise control in a 2014 Mercedes-Benz SL65 AMG is crucial for maintaining both safety and optimal vehicle performance. While it may not seem like an immediate emergency, neglecting this issue can lead to significant consequences. A malfunctioning cruise control system often signals underlying problems with the vehicle's electronics or sensors, which could potentially affect other critical systems. This is particularly concerning during long drives, where cruise control is typically utilized to reduce driver fatigue and enhance fuel efficiency. Ignoring the symptoms may not only compromise your driving experience but could also pose safety risks, especially on highways where maintaining a constant speed is essential. Therefore, it is advisable to have the cruise control system inspected and repaired by a qualified mechanic or dealership promptly, ensuring that your vehicle remains safe and reliable on the road.

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2014 Mercedes-Benz SL65 AMG Cruise Control Issues & Costs