What is the reason for the abnormal noise when reversing a Mercedes-Benz C-Class?
2 Answers
Mercedes-Benz C-Class reversing abnormal noise is due to the large gap between the steering gear rack and pinion. Preventing abnormal noise: Avoid turning the steering wheel in place, try to turn the steering wheel after the vehicle starts moving. After the vehicle is parked, the steering wheel should be returned to the center position to avoid the suspension system and tires bearing the load. When making a U-turn, try to avoid turning the steering wheel to the limit position. Causes of reversing abnormal noise: Since the speed during reversing is not high, it may be difficult to hear abnormal noises under normal circumstances, but they may be more easily heard at this time, such as door abnormal noises, loose hinges, wear and looseness, or abnormal noises from other structural components. Abnormal noise inside the transmission itself.
I've previously researched this issue with the Mercedes-Benz C-Class. The reverse gear noise could be caused by these common problems: aging and cracking of chassis rubber components, especially the stabilizer bar bushings - these creak the loudest in cold winter weather. Alternatively, it might be related to the braking system; many owners complain about brake pad material issues, where metal shavings rubbing during reverse braking sound like metal scraping. Another possibility is excessive play in the driveshaft universal joint, which causes a knocking sound when bearing reverse force during reversing. Loose suspension components could also be the culprit - for example, a loose lower control arm ball joint would produce a thumping noise when reversing. I recommend first checking the cheapest fixes: the bushings and brake pads, as these are inexpensive to repair. If the noise persists, then you'll need to lift the chassis to inspect the drivetrain system.
