LI46.10-P-077313
Service Bulletin Details
Public Details for: LI46.10-P-077313
The steering wheel generates grinding noises between the steering wheel and steering column switch module during steering maneuvers see example file in the attachments area: lenkrad-schleifger??A?Usch_steeringwheel-grindingnoises.Mp4 t
- 2024 - 2023 - 2022 - 2021 - 2020 - 2019 -
Models from 2024
Models from 2023
Models from 2022
Models from 2021
Models from 2020
Models from 2019
Noises In The Steering Wheel Area When Steering Topic number LI46.10-P-077313 Version 1 Function group 46.10 - Steering wheel, jacket tube, steering shaft, steering lock Date 1/22/24 Validity Vehicles as of production year 2019 Reason for change Complaint The steering wheel generates grinding noises between the steering wheel and steering column switch module during steering maneuvers See example file in the attachments area: Lenkrad-Schleifgeräusch_SteeringWheel-GrindingNoises.mp4 Cause The plastic cover on the back of the steering wheel is not positioned correctly and may therefore rub against the steering column switch module Remedy Please use the following noise files for the damaged part analysis: 1. 2. Grinding noise | pot. cause: steering wheel | see attachment: Lenkrad-Schleifgeräusch_SteeringWheel-GrindingNoises.mp4 Creaking/cracking noise | pot. cause: steering column switch module | see attachment: MRSM-Schleifgeräusch_SCCM-GrindingNoises.MOV If the noise is due to the steering column switch module, please use LI46.10-P-077314. Check for grinding areas on the steering wheel: Please check the covers on the rear for protrusion and, if necessary, remount. 1. Mask off openings on back of steering wheel with adhesive tape 1. Mark the back of the steering wheel with colored chalk (see Picture 1) 2. Mount steering wheel on steering column switch module and turn the steering wheel from left lock to right lock ten times. 3. The chalk will now have disappeared in the areas where there is rubbing (see Picture 2) Warning: Ensure that no cables and visible areas of the steering wheel are damaged. The abrasive excess material on the back of the steering wheel must be carefully removed with a Dremel tool. Tip: You will need to remove approx. 0.1 mm to 0.3 mm of material (example: Picture 3) Make sure that none of the ground-off material gets into the steering wheel. After removing the material, clean the entire back of the steering wheel with a 1% soap solution. NaN.NaN.NaN NaN:NaN:NaN © Copyright Mercedes-Benz AG JKANTAR Page 1 / 4 Do not blow off the steering wheel with compressed air. Attachments File Description Lenkradrückseite Kreide.jpg Picture1: Steering wheel with chalk applied Lenkradrückseite Kreide geschliffen.jpg Picture2: Steering wheel with chalk rubbed off NaN.NaN.NaN NaN:NaN:NaN © Copyright Mercedes-Benz AG JKANTAR Page 2 / 4 Lenkrad abgeschliffen markiert.jpg Picture3: Steering wheel with areas ground off MRSM-Schleifgeräusch_SCCM-GrindingNoises.MOV Noises caused by the steering column switch module (MRSM/SCCM) Lenkrad-Schleifgeräusch_SteeringWheel-GrindingNoises.mp4 Noise caused by the steering wheel Symptoms NaN.NaN.NaN NaN:NaN:NaN © Copyright Mercedes-Benz AG JKANTAR Page 3 / 4 Chassis/suspension > Steering system > Noises > Dragging/squealing Chassis/suspension > Steering system > Steering wheel > Vibrates Chassis/suspension > Steering system > Steering wheel > Pulses Operation numbers/damage codes Op. no. Operation text NaN.NaN.NaN NaN:NaN:NaN © Copyright Mercedes-Benz AG Time Damage code Note ZM 4624836 Steering wheel noise JKANTAR Page 4 / 4