Mercedes-Benz SL320 Windshield Wipers Aren't Working

Common Causes of Windshield Wiper Malfunctions in Your Mercedes-Benz SL320 and How to Fix Them

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Reviewed by
Devin Cabugcal
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 SL320 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 SL320 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 SL320

When faced with non-functional windshield wipers in your Mercedes-Benz SL320, it's essential to adopt a systematic diagnostic approach. Begin by checking the windshield wiper fuse, as this is often the simplest and most common issue. If the fuse is intact, proceed to inspect the wiper motor, which could be faulty if the wipers are completely unresponsive. Next, examine the wiper linkage, as any disconnections or damage here can prevent proper movement. If the wipers are operational but not clearing the windshield effectively, consider replacing the wiper blades, as worn-out blades can significantly impair visibility. Additionally, ensure that the windshield is clean, as dirt can obstruct the wipers' effectiveness. Misalignment of the wiper arms can also lead to inadequate clearing, so check their positioning. Finally, if necessary, inspect the wiper arm assembly and frame, which may require removing a plastic cover for access. By following this structured approach, you can efficiently diagnose and resolve the issues with your windshield wipers, ensuring safe driving conditions.

What to Check When Windshield Wipers Aren't Working on a Mercedes-Benz SL320?

When your Mercedes-Benz SL320's windshield wipers are not functioning, it's crucial to systematically investigate several common issues that may be causing the problem. Begin by checking the windshield wiper fuse, as a blown fuse is often the simplest and quickest fix. If the fuse is intact, the next step is to inspect the wiper motor; a malfunctioning motor can completely halt wiper movement and may need repair or replacement. Additionally, examine the wiper switch, as a defective switch can interrupt the electrical flow necessary for the wipers to operate. It's also important to assess the condition of the wiper blades; worn or damaged blades can lead to poor visibility, which is vital for safe driving. Furthermore, inspect the wiper linkage for any misalignment or damage that could impede the wipers' movement. If the wipers are operating erratically, consider recalibrating the system, a relatively simple task that can restore proper functionality. By addressing these common issues, you can effectively troubleshoot and potentially resolve the problems with your windshield wipers, ensuring a safer driving experience.

Why Are the Windshield Wipers Not Working on a Mercedes-Benz SL320?

When the windshield wipers on your Mercedes-Benz SL320 fail to operate, it’s crucial to address the problem without delay. Ignoring this issue can compromise your visibility during rain or snow, significantly increasing the risk of accidents. Start by inspecting the wiper blades for any signs of wear or tearing, as damaged blades are a common culprit. Next, check the windshield wiper fuse; a blown fuse can easily disrupt the wiper function and is a straightforward fix. If these components are in good condition, the problem may lie with the wiper motor, which could be faulty or obstructed by ice or snow. Additionally, wiring issues or malfunctioning positional sensors can also prevent the wipers from working correctly. By systematically diagnosing these potential causes, you can ensure your wipers are functioning properly, maintaining your safety on the road and preventing more extensive repairs down the line.

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Mercedes-Benz SL320 Wipers Not Working? Common Fixes