Steering - Scraping Noises When Steering Mercedes Benz C 300 4MATIC (204.081) V6-3.0L (272.948)

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

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2010 Mercedes Benz C 300 4MATIC (204.081) V6-3.0L (272.948)

Symptoms

Parts

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