Mercedes Benz C 300 4MATIC # 2010100002 Date: 101001
Recall - Check Power Steering Line Connection Fitting
FILE:
SERVICE: GROUP 00 OF SERVICE INFORMATION BINDER
PARTS: GROUP I OF INFORMATION _ PARTS & ACCESSORIES BINDER
Campaign No. 2010100002, October 2010
TO: ALL MERCEDES-BENZ CENTERS
SUBJECT:
Models 204, 207, 212 Model Year 2010, Model 207.4 Model Year 2011
Check Power Steering Line Connection Fitting
This Recall Campaign has been initiated because Daimler AG (DAG) has determined that the power steering system in the subject vehicles may fail
due to the loss of power steering fluid. The connection fitting on the high-pressure power steering line at the connection to the pump did not have
sufficient torque applied during the production process. Loss of torque of the connection fitting may, overtime, result in a loss of power steering
fluid. As a result of the loss of power steering fluid, owners may not have sufficient control of the vehicle in areas, such as parking, where maximum
power steering is required, and could lead to a vehicle crash.
Attached is a sample copy of a letter which owners of the affected vehicles will receive.
Prior to performing this Recall Campaign:
^ Please check VMI to determine if the vehicle is involved in the Campaign and if it has been previously repaired.
^ Please review the entire Recall Campaign bulletin and follow the repair procedure exactly as described.
Please note that Recall and Service Campaigns do not expire and may also be performed on a vehicle with a vehicle status indicator.
Approximately 85,078 vehicles are affected.
Procedure
A. Check Manufacturer of Power Steering Pump
1. Remove driver's side engine air intake duct upstream of air filter.
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2. Check identification plate of power steering pump (Figure 1).
Note:
Use a mirror if necessary.
^ If Manufacturer is "ZF Lenksysteme": Proceed to Subject B, Check Power Steering Pump
^ If other manufacturers: Procedure is complete.
B. Check Power Steering Pump
1. Temporarily replace the original power steering reservoir cap (circled, Figure 2) with the unvented reservoir cap (A) for this campaign.
Note:
^ This cap (A) reduces power steering fluid leakage during the subsequent operation steps.
^ Two caps will be shipped to each dealer (Part number: A 001 466 27 05 05).
^ This cap must be treated similar to a special tool, since it's only available in limited numbers. Paint cap with a light color paint (white, yellow etc.)
so it is noticeable and not left on the pump.
Caution!
Be sure to reinstall the original power steering reservoir cap when checking the fluid level and bleeding.
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2. Disconnect power steering high pressure line fitting (arrow, Figure 3/4) from the pump:
^ Place a shop rag below the power steering pump line fitting (arrow, Figure 3).
^ Remove bolt (A)
^ Disconnect power steering high pressure line fitting (arrow, Figure 3) from power steering pump.
3. Put socket wrench bit (special tool) onto connection fitting (arrow, Figure 4) and check whether it can be turned by hand (without any tools).
^ If the connection fitting (arrow, Figure 4) cannot be turned by hand: Proceed to Subject C.
^ If the connection fitting (arrow, Figure 4) can be turned by hand: Proceed to Subject D.
Note:
^ If the connection fitting (arrow, Figure 4) cannot be turned by hand, the 0-ring of the fitting does not have to be replaced.
^ If the connection fitting (arrow, Figure 4) can be turned, as a precaution, the 0-ring ring must be replaced.
C. Torque the Connection Fitting, Reconnect Power Steering Hose.
1. Torque connection fitting (arrow, Figure 4) using socket wrench to 55 Nm.
2. Reconnect power steering high pressure line fitting (arrow, Figure 3) to the connection fitting on power steering pump then torque bolt (A, Figure
3) to 18 Nm.
Note:
Replacement of 0-ring on power steering line itself (arrow, Figure 3) is not required.
3. Check power steering fluid level, correct if necessary:
^ Remove unvented power steering fluid cap (do not reinstall this cap).
^ Start the engine, turn steering wheel side to side up to the limit stop 8 times.
^ Fill fluid level to proper level with engine off.
^ Reinstall the original power steering fluid reservoir cap then check fluid level and check fluid for foaming.
Caution!
Be sure to reinstall the original power steering reservoir cap.
4. Check for leaks at the power steering line connection fitting (arrow, Figure 3) to the power steering pump.
Note:
Clean up any power steering fluid that may have leaked during procedure.
5. Reassemble in reverse order. Procedure is complete.
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D. Replace Power Steering Pump Connection Fitting 0-Ring
1. Completely unscrew connection fitting (arrow, Figure 4) and replace 0-ring on connection fitting (arrow, Figure 4).
2. Torque connection fitting (arrow, Figure 4) using socket wrench to 55 Nm.
3. Reconnect power steering high pressure line fitting (arrow, Figure 3) to connection fitting on power steering pump then torque bolt (A, Figure 3)
to 18 Nm.
Note:
Replacement of 0-ring on power steering line itself (arrow, Figure 3) is not required.
4. Check power steering fluid level, correct if necessary:
^ Remove unvented power steering fluid cap (do not reinstall this cap).
^ Start the engine, turn steering wheel side to side up to the limit stop 8 times.
^ Fill fluid level to proper level with engine off.
^ Reinstall the original power steering fluid reservoir cap then check fluid level and check fluid for foaming.
Caution!
Be sure to reinstall the original power steering reservoir cap.
5. Check for leaks at the power steering line connection fitting (arrow, Figure 3) to the power steering pump.
Note:
Clean up any power steering fluid that may have leaked during procedure.
6. Reassemble in reverse order.
Special Tools
Primary Parts Information
Note:
^ Please be aware that only the part number(s) referenced in the Campaign Bulletin is/are approved for use to repair the vehicle. Repairs performed
using any other part(s) will not have been performed in accordance with the campaign. Accordingly, warranty claims submitted with reference to
an improper part number(s) will be denied.
^ The following allowable labor operation should be used when submitting a warranty claim for this repair:
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Warranty Information
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