Mercedes-Benz C43 AMG Windshield Wipers Aren't Working

Common Causes of Windshield Wiper Malfunctions in Your Mercedes-Benz C43 AMG and How to Fix Them

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Reviewed by
Andrew Hajjar
Written by RepairPal Car Genius
Updated January 14, 2025
0%
75% chance it's the
Wiper Motor
0%
25% chance it's the
Switch
The most common reasons a Mercedes-Benz C43 AMG windshield wipers aren't working are broken wiper motor and issues with the switch.
  • Wiper Motor: A faulty wiper motor or a bad electrical connection can result in intermittent or non-functioning windshield wipers.
  • Switch: A faulty switch can result in intermittent or complete failure of the electrical component it controls, leading to malfunctioning systems.
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 C43 AMG windshield wipers aren'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.

A failed windshield wiper motor will do one of two things in the event of failure. First, it can intermittently work, meaning when the wiper switch is turned on, the windshield wipers may activate, and run for a random amount of time. This may happen at random, or change with a bump. Lastly, the windshield wipers could show no signs of activity, indicating motor failure.

The moment water touches the windshield, you know if you need new windshield wiper blades. If your wiper blades are torn, cracked, hard, or brittle, it is time for replacement. Wipers should also be replaced if the wiper blades only smear water around, seem to make a mess, streak the windshield, and miss large patches. If you are unhappy with the current wiper blades on your vehicle, this is a very economical change to make.

Windshield wiper arms will be replaced mainly for aesthetic reasons or damage. If the windshield arms become bent or rusted, the windshield wipers may not contact the windshield at the proper angle, or there may be no contact at all. Also, the sun will take a toll on these parts after years of use, and fading or clear coat peeling will result, not to mention rust.

Troubleshooting Non-Functional Windshield Wipers in a Mercedes-Benz C43 AMG

When faced with non-functional windshield wipers in your Mercedes-Benz C43 AMG, it's essential to adopt a systematic diagnostic approach. Begin by checking the windshield wiper fuse, as this is a straightforward task that can often resolve the issue without further intervention. If the fuse is intact, inspect the wiper blades for any signs of wear or improper installation, as damaged blades can significantly hinder performance. Next, verify that the hood is securely closed, as the wiper system may be designed to disable if the hood is ajar. Additionally, test the windshield washer function; if it operates, this indicates that the motor and wiring are likely functioning correctly, narrowing down the problem. Regular maintenance, such as cleaning the wiper blades and windshield, can also enhance performance and prevent future issues. If the blades are worn, replacing them is a simple yet effective solution that should be performed at least annually. By following this methodical approach, you can efficiently diagnose and resolve issues with your windshield wipers, ensuring safe visibility while driving.

What to Check When Windshield Wipers Aren't Working on a Mercedes-Benz C43 AMG?

When your Mercedes-Benz C43 AMG's windshield wipers fail to operate, it's essential to systematically check several critical components to diagnose the problem effectively. Start with the wiper motor, as a malfunction here is a frequent cause of wiper failure; if the motor is not functioning, the wipers will remain stationary. Next, examine the wiper switch, which can also be a source of trouble if it is faulty, preventing the wipers from responding to commands. Additionally, inspect the wiper blades themselves; worn or damaged blades can significantly impair performance, even if the motor and switch are working correctly. Don't forget to check the wiper fuse, as a blown fuse can disrupt the entire system. If the washer fluid lines are disconnected, this can also affect the wipers' operation, so ensure they are intact. Lastly, consider the wiper module and relays, as issues here, while less common, can still lead to wiper malfunctions. By methodically checking these components, you can identify the root cause of the problem and take the necessary steps to restore your wipers to full functionality.

Why Are the Windshield Wipers Not Working on a Mercedes-Benz C43 AMG?

When the windshield wipers on your Mercedes-Benz C43 AMG fail to operate, it’s crucial to address the issue without delay. Neglecting malfunctioning wipers can lead to dangerous driving conditions, particularly in inclement weather where visibility is compromised. A blown fuse, worn-out blades, or a malfunctioning washer system can all contribute to this problem, and each of these issues can escalate if not resolved promptly. For instance, old wiper blades can scratch the windshield, leading to costly repairs, while a faulty wiper motor may require extensive electrical work if left unchecked. Additionally, if the switch that detects whether the hood is closed is malfunctioning, it can prevent the wipers from functioning altogether, posing a significant safety risk. By taking the time to troubleshoot and resolve these issues, you not only ensure your safety on the road but also maintain the integrity and performance of your vehicle. Addressing these symptoms early can save you from more severe damage and costly repairs down the line.

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