Mercedes-Benz 190E Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your Mercedes-Benz 190E 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
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25% chance it's the
Control Module
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25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a Mercedes-Benz 190E 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 Mercedes-Benz 190E 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.

Troubleshooting Cruise Control Issues in a Mercedes-Benz 190E

When troubleshooting cruise control issues in your Mercedes-Benz 190E, it's essential to adopt a methodical diagnostic approach. Begin by inspecting the simplest components, such as the brake switch, which is crucial for the cruise control system's operation. This switch, located near the brake pedal, can often be the source of the problem if it is faulty or misaligned. Next, examine the cruise control actuator, typically found above the starter and beneath the intake manifold. A malfunctioning actuator can prevent the system from engaging properly. If these components appear to be in good condition, check for blown fuses or any signs of electrical issues, as these can disrupt the cruise control functionality. Additionally, keep an eye on the check engine light; any engine-related problems can also impact the cruise control system. By systematically assessing these elements, you can effectively identify and resolve the issues affecting your cruise control, ensuring a smoother driving experience.

What Are the Common Problems Causing Cruise Control Issues in a Mercedes-Benz 190E?

When troubleshooting cruise control issues in a Mercedes-Benz 190E, it's essential to understand the common problems that may arise. One of the primary culprits is a failed control module, specifically the cruise control amplifier, which can transition from intermittent functionality to complete failure. Additionally, sensor or switch malfunctions can disrupt the cruise control system's operation, making it crucial to inspect these components thoroughly. Another significant factor is throttle actuation; a faulty throttle actuator or related parts can hinder the cruise control's ability to maintain speed effectively. To effectively diagnose these issues, start by examining the control module, sensors, and throttle components, as regular maintenance and inspection of these areas can prevent future problems and ensure the cruise control system operates smoothly.

Why is the Cruise Control Not Working in a Mercedes-Benz 190E?

When the cruise control in your Mercedes-Benz 190E is not functioning, it is crucial to address the issue without delay. A defective brake pedal switch is a common culprit, and if this switch fails, it can prevent the cruise control from engaging, potentially leading to unsafe driving conditions. Additionally, a dead battery or a malfunctioning ABS wheel speed sensor can trigger warning lights and further complicate the situation. If you see an error message indicating that the cruise control is inoperative, it may be a sign of underlying problems with the throttle control system or even a broken vacuum line, especially in older models. Ignoring these symptoms not only diminishes your driving experience but can also pose significant safety risks, particularly if the issue is related to braking systems. Therefore, it is essential to diagnose and resolve these problems promptly to ensure your vehicle operates safely and efficiently.

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