Mercedes Benz C 43 AMG Technical Service Bulletin # P-46_20-16E Date: 090227

Mercedes Benz C 43 AMG Technical Service Bulletin # P-46_20-16E Date: 090227

Steering - Leaks At Steering Gear/Hose Junction

Date: February 27, 2009

Order No.: P-B-46.20/16e

Supersedes: P-B-46.20/16d dated Nov. 10, 2008;

P-B-46.20/10c dated Dec. 19, 2007

Group: 46

Revision History

SUBJECT:

Models 171, 203, 204, 209, 211, 215, 216, 219, 220, 221, 230

Leaks at the Steering Gear Control Head Connection to High or Low Pressure Lines or Leaks at Internal Steering Lines of the Control Head

Connection to Steering Gear Housing

If you receive customer reports in the above model vehicles of leakage at the steering gear control head connection of high and low pressure lines or

from the internal steering lines at the connection between the control head and the steering housing, this may be caused by damage to a respective

O-ring at the control head or steering housing. Follow the below to resolve.

Note:

It is not necessary to replace the entire rack-and-pinion steering system. The O-rings are now available as separate parts or as part of repair kits.

Repair A (Model 171, 203, 204, 209, 211, 215, 216, 219, 220, 221 and 230)

To replace the O-rings of the affected connections at the steering gear control head to the high or low pressure steering lines, it is necessary to seal

both lines at the same time, due to the common retaining plate for both lines. Proceed as follows.

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1. Loosen line connection on steering gear. Refer to applicable WIS documents shown above.

Note:

If necessary, loosen line supporting brackets.

2. Replace sealing rings and support ring.

Note:

Ensure that sealing rings and supporting ring are properly seated. Supporting ring only present on high pressure line.

Note:

There are two versions of power steering high-pressure lines. The preceding version has a slotted support ring which can be replaced individually.

The new version has a support ring which is not slotted and which cannot be replaced individually; in this case the complete power steering high

pressure hose must be replaced (refer to EPC to specify correct high pressure hose).

3. Fasten line connection on steering gear with retaining plate. Fasten any loosened line supporting brackets and reinstall any removed panelings.

Note:

Observe torque values for screw connection. Refer to WIS documents for specifications.

4. Bleed steering system and check for leaks. Refer to the DTB S-B-46.30/40b (or latest version).

Repair B (Model 203, 204, 209, 211, 215, 219 and 220):

To remedy leaks at the connections of internal lines between the steering gear head and the steering housing individually, replace the short or long

internal oil lines and respective seals. Proceed as follows.

1. Remove the steering gear from the vehicle as described in the WIS documents as shown above.

2. Replace internal pipelines from control head to steering gear housing. Refer to applicable WIS document as shown above.

3. Reinstall the power steering gear as described in the WIS documents listed under step 1 based on the respective model.

4. Toe adjustment after removal/reinstallation of the steering gear is NOT necessary. (Refer to latest version of DTB P-B-46.20/28

Note:

Always refer to EPC for the latest information on parts.

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Parts Information

Note:

The following allowable labor operations should be used when submitting a warranty claim for this repair. This information has been generated on

February 27, 2009. Please refer to Netstar --> Star TekInfo --> Star Time for the most current labor time allowance.

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In Case of Warranty, use the table above.