2024 Mercedes-Benz C300 Cruise Control Isn't Working

Fixing Cruise Control Issues in the 2024 Mercedes-Benz C300

Find Repair Location
Reviewed by
Bo Fader
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 2024 Mercedes-Benz C300 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 2024 Mercedes-Benz C300 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.

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 steps to diagnose the cruise control issue in a 2024 Mercedes-Benz C300?

When diagnosing a cruise control issue in your 2024 Mercedes-Benz C300, it's essential to adopt a systematic approach that starts with the simplest solutions. Begin by checking the cruise control fuse, as a blown fuse is a common culprit that can easily disrupt the system's functionality. Next, inspect the cruise control buttons on your steering wheel; ensure they are responsive and free from any physical damage, as faulty buttons can prevent the system from engaging. If these initial checks do not resolve the issue, utilize a diagnostic scanner to identify any error codes that may indicate specific problems within the cruise control system. Additionally, verify the operation of the speed sensors, as they are critical for the cruise control to function correctly; malfunctioning sensors can lead to erratic behavior. Finally, take a moment to examine the wiring connections associated with the cruise control system for any signs of wear or loose connections, as these can significantly impact performance. By following these steps, you can effectively narrow down the potential causes of the cruise control issue and take appropriate action to resolve it.

What are the common problems that could cause the cruise control to stop working in a 2024 Mercedes-Benz C300?

When the cruise control in your 2024 Mercedes-Benz C300 ceases to function, it can be frustrating, but understanding the common problems can help you troubleshoot effectively. One of the primary culprits is a faulty speed sensor, which is crucial for the system to accurately gauge your vehicle's speed. If this sensor malfunctions, the cruise control may fail to engage or maintain speed. Another frequent issue arises from the brake light switch; if this switch is defective, it may not 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 vacuum leaks in the engine that affect the necessary vacuum signals for operation. By identifying and addressing these common issues, you can restore your cruise control system to its intended performance.

How urgent is it to address the malfunctioning cruise control in my 2024 Mercedes-Benz C300?

Addressing a malfunctioning cruise control system in your 2024 Mercedes-Benz C300 is of utmost importance due to the potential safety hazards it poses. A malfunction can lead to unexpected acceleration or deceleration, significantly increasing the risk of accidents on the road. Moreover, neglecting this issue can result in further damage to the cruise control system and related components, leading to more extensive and costly repairs down the line. By taking immediate action, you not only safeguard your safety but also enhance your driving experience, as a properly functioning cruise control system contributes to a more comfortable and convenient ride. Therefore, it is crucial to prioritize repairs to ensure both your safety and the optimal performance of your vehicle.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.