What is the problem when a Mercedes-Benz makes abnormal noise when shifting gears?
1 Answers
Mercedes-Benz cars make abnormal noise when shifting gears for the following reasons: 1. Damaged transmission housing: The transmission housing and bearing seat holes are worn and deformed over time. This noise is loudest when shifting into low gear and gradually decreases as higher gears are engaged, with direct drive producing the least noise. 2. Broken gear teeth: This causes impact during meshing. When shifting into this gear, strong impact and vibration occur, leading to resonance in the transmission housing. 3. Improper transmission assembly: Improper replacement of gears, needle bearings, or bushings in a certain gear of the transmission, or abnormal assembly clearance, results in poor gear meshing and abnormal noise during transmission.