2010 Mercedes Benz C 300 4MATIC (204.081) V6-3.0L (272.948)
Vehicle: All Technical Service Bulletins
Steering - Scraping Noises When Steering
Scraping noises when steering
Topic number LI46.10-P-054502
Version 1
Design group 46.10 Steering wheel, casing tube, steering shaft, steering lock
Date 09-06-2012
Validity Model series 204, 212, 218
Reason for change
Complaint
Scraping noises when steering
Note:
Only affects vehicles fitted with a heat shield with aluminum ring as shown in Figure 1.
File/Designation
Cause
The steering boot heat shield with aluminum ring has loosened and is scraping on the steering shaft (Figure 1)
If the scraping of the aluminum ring on the steering shaft is not the cause of the scraping noises when steering, the problem is being caused by other
components. See other documents in Design Group 46.
Remedy
Replace steering boot heat shield with aluminum ring with a silicone heat
shield without aluminum ring:
Specify correct replacement part for vehicle through the EPC as indicated below in group 49.
Note:
The silicone heat shield is not a constituent part of the steering boot or of the steering boot repair kit. In the EPC this vehicle-specific component is
listed in Design Group 49 (Exhaust system) under 300 (Shields).
Removal:
- Separate lower steering shaft from steering column tube and steering coupling
- Remove steering shaft together with steering boot and heat shield towards the inside (see AR46.10-P-0621)
Installation:
- Fit new heat shield on lower steering shaft (Figure 2)
- Press silicone boot onto steering boot using assembly fluid if necessary. Observe correct alignment: The "TOP" marking on the silicone heat
shield must be positioned at 180° to the arrow marking on the steering boot
- Check that the steering boot is correctly seated on the lower steering shaft: The steering boot (black) must be uniformly visible across its diameter,
see arrow in Figure 3
- Fold over the bead of the steering boot; mount the lower steering shaft, with steering boot and silicone heat shield fitted, in the firewall and fold
back the bead of the steering boot, making sure that the arrow on the steering boot points downwards; in the engine compartment mount the steering shaft on the steering coupling, making sure that the silicone heat shield is correctly seated
Example of silicone heat shield incorrectly fitted, see Figure 4
Example of silicone heat shield correctly fitted, see Figure 5
Reassemble vehicle
File/Designation
-----------------------------------------------------Page 1-----------------------------------------------------
2010 Mercedes Benz C 300 4MATIC (204.081) V6-3.0L (272.948)
Symptoms
Parts
-----------------------------------------------------Page 2-----------------------------------------------------
