Mercedes-Benz C450 AMG Windshield Wipers Aren't Working

Common Causes of Windshield Wiper Malfunctions in Your Mercedes-Benz C450 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 C450 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 C450 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 C450 AMG

When faced with non-functional windshield wipers in your Mercedes-Benz C450 AMG, it's essential to adopt a systematic diagnostic approach. Start by checking the windshield wiper fuse, as this is a straightforward task that can often resolve the issue if the fuse is blown. Next, inspect the hood closure switch; if this switch is malfunctioning, it may prevent the wipers from operating even when the hood is securely closed. If the washer function is operational but the wipers remain inactive, this could indicate a problem with the wiper motor or wiring, necessitating a closer examination of these components. Additionally, consider the age and condition of your wiper blades; hardened or brittle rubber can lead to wipers seizing up. Finally, if the problem persists, inspect the wiper arm assembly and frame, as accessing these parts may reveal underlying issues with the motor or other mechanical components. By following this methodical approach, you can effectively diagnose and potentially resolve the problem with your windshield wipers.

Troubleshooting Windshield Wiper Issues in a Mercedes-Benz C450 AMG

When dealing with windshield wiper issues in your Mercedes-Benz C450 AMG, it's crucial to understand the common problems that may arise. One frequent culprit is a blown fuse, which can easily be checked and replaced at home, restoring functionality to your wipers. Additionally, worn-out rubber blades can lead to wipers seizing up; inspecting and replacing these blades can often resolve the issue. It's also important to examine the wiper arms for any signs of bending or damage, as compromised arms can hinder performance. If the wipers are completely unresponsive, the wiper motor may be at fault, necessitating a replacement. By familiarizing yourself with these common failure modes, you can effectively diagnose and address windshield wiper problems, ensuring your vehicle remains safe and functional on the road.

Why Are the Windshield Wipers Not Working on a Mercedes-Benz C450 AMG?

When the windshield wipers on your Mercedes-Benz C450 AMG fail to operate, it is crucial to address the issue without delay. Neglecting this problem can lead to dangerous driving conditions, especially during rain or adverse weather, where visibility is compromised. A blown fuse is often the simplest culprit and can be checked easily at home, but if left unresolved, it may indicate deeper electrical issues that could escalate into more significant repairs. Additionally, worn-out wiper blades can not only hinder visibility but also scratch your windshield, leading to costly replacements. If the wiper motor or switch is malfunctioning, it could prevent the wipers from functioning altogether, posing a serious safety risk. Furthermore, problems with the combination switch or the front SAM can lead to further complications, potentially affecting other electrical systems in your vehicle. Therefore, it is essential to systematically troubleshoot these issues to ensure your wipers are functioning correctly, maintaining both your safety and the integrity of your vehicle.

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