2017 Mercedes-Benz SLC43 AMG Cruise Control Isn't Working

Fixing Cruise Control Issues in 2017 Mercedes-Benz SLC43 AMG

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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 2017 Mercedes-Benz SLC43 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 2017 Mercedes-Benz SLC43 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.

What steps should I take to diagnose the non-functioning cruise control in my 2017 Mercedes-Benz SLC43 AMG?

To effectively diagnose the non-functioning cruise control in your 2017 Mercedes-Benz SLC43 AMG, begin with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by inspecting the cruise control fuse in the fuse box, as a blown fuse is a common and easily rectifiable issue. Next, examine the cruise control buttons on the steering wheel for any signs of damage or sticking, as these can hinder the system's operation. Following this, verify the functionality of the speed sensors, since faulty sensors can disrupt the cruise control's ability to maintain speed. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into any underlying issues. Additionally, ensure that the brake and clutch switches are functioning correctly, as malfunctioning switches can prevent the cruise control from engaging. Finally, inspect the wiring and connections associated with the cruise control system for any damage or corrosion, as compromised wiring can lead to system failures. By following this structured diagnostic approach, you can efficiently identify and address the root cause of your cruise control issues.

What are the common problems that could cause the cruise control to stop working in a 2017 Mercedes-Benz SLC43 AMG?

When the cruise control in your 2017 Mercedes-Benz SLC43 AMG ceases to function, it can be frustrating, but understanding the common problems can help you diagnose the issue. One frequent culprit is a faulty speed sensor, which is essential for the cruise control system to accurately gauge your vehicle's speed. If this sensor is malfunctioning, the system may fail to engage or maintain speed. Another common issue is related to the brake light switch; if this switch is defective, it may not properly signal the cruise control system to disengage when the brake pedal is pressed, leading to operational failures. Additionally, a malfunctioning throttle actuator can disrupt the system's ability to maintain a steady speed, as it controls the engine's throttle opening. Electrical problems, such as blown fuses or wiring issues, can also impede the cruise control's functionality, as can software glitches within the vehicle's control module. By identifying these potential problems, you can take the first steps toward troubleshooting and possibly fixing the cruise control system in your vehicle.

How urgent is the repair for the non-functioning cruise control in a 2017 Mercedes-Benz SLC43 AMG?

When considering the urgency of repairing the non-functioning cruise control in your 2017 Mercedes-Benz SLC43 AMG, it is essential to recognize the potential consequences of delaying this repair. A malfunctioning cruise control system can compromise your safety on the road, as it may hinder your ability to maintain a consistent speed, especially during long drives or on highways. This inconsistency can lead to increased fatigue and a higher risk of accidents. Additionally, the absence of cruise control can significantly detract from your driving comfort, making extended journeys more taxing and less enjoyable. Furthermore, if you plan to sell or trade in your vehicle in the future, a fully functional cruise control system can enhance its resale value. Therefore, while the urgency may vary based on personal driving habits, addressing this issue promptly is advisable to ensure your safety, comfort, and the overall value of your vehicle. Consulting with a qualified mechanic can provide clarity on the severity of the problem and the best steps to take.

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2017 Mercedes-Benz SLC43 AMG Cruise Control Issues & Repairs