Mercedes front axle load change on the drive shaft snapping sound technical bulletin

Mercedes front axle load change on the drive shaft snapping sound technical bulletin 2018 - 10 - 27 models: all mercedes-benz Mercedes front-wheel drive passenger vehicles and 4 x4 vehicles fault description: start, clicks during a lateral axle load change, In the same side hear) 。 From moving forward to reverse ( And vice versa) , will hear a click. The cause of the problem: if can try to loosen the flange nut on the wheels, 1) And troubleshooting, it shows that the reason is that the wheel bearing inner ring and side shell shaft universal joint connection of moving slightly. Tip: the flange nut must be replaced after the release, and then use specified tightening torque. Solution: use molik paint ( 二硫化钼润滑剂) Daub side shaft and wheel bearing contact area, therefore in the following steps: 1, remove the wheel lateral axis ( The outer gimbal meshing tooth pulled out from the hub) ； 2, daub molik paint ( 二硫化钼润滑剂) Clean before you contact A ( Clean and no oil) （ The diagram below) ； 3, use molik paint ( 二硫化钼润滑剂) Daub interface is A ( See the attached image files' universal joint shell after returning the lacquer on external ') And in the condition of remove dry an hour; 4, back to the lateral axis. Tip: use the low coefficient of friction before coating ( 二硫化钼润滑剂) Stirring or shaking evenly. （ Source: BENZ maintenance)