What are the causes of the abnormal noise in the Mercedes-Benz GLC wiper?
2 Answers
Mercedes-Benz GLC wiper abnormal noise is caused by the improper installation of the wiper blade support frame, which is not parallel to the car windshield. Solutions for Mercedes-Benz GLC wiper abnormal noise: Check whether the noise occurs when the wiper blade is moving up or down. If the noise occurs when moving up, it means the wiper frame is twisted upward. Stop the wiper in the middle position (pull the wiper control handle toward the steering wheel after turning off the car), then gently lift the wiper, wrap the steel frame with a cloth or soft material, and use a wrench or pliers to twist the wrapped part downward a few times. After resetting, test the wiper. If the noise decreases, repeat the process until the noise is eliminated. If the noise occurs when moving down, it means the wiper frame is twisted downward. Stop the wiper in the middle position, lift it, wrap the steel frame with a cloth or soft material, and use a wrench or pliers to twist the wrapped part upward a few times. After resetting, test the wiper. If the noise decreases, repeat the process until the noise is eliminated. If a single wiper blade makes noise both when moving up and down, a new car wiper blade should be replaced.
I also experienced wiper noise issues when driving my Mercedes-Benz GLC. That rainy day, I kept hearing annoying squeaking sounds while driving. After checking, possible causes included: the wiper blade rubber had aged, hardened, and become brittle, increasing friction noise against the glass; oil film or dust on the windshield that wasn't cleaned promptly caused uneven movement; or loose wiper arm springs affecting pressure distribution. My solution process was: first, I repeatedly cleaned the windshield with glass cleaner to remove stains, which reduced the noise somewhat but didn't eliminate it completely. Later, after installing new wiper blades, the noise disappeared entirely. My experience tells me that wiper blades typically last 1-2 years and need replacement. To prevent this, avoid prolonged sun exposure to reduce rubber hardening, and clean the glass during monthly car washes. Although it seems minor, wiper issues affect visibility and safety—they shouldn't be ignored. Fix them promptly for safe driving.
