Campaign - Check/Replace Front Air Suspension Struts: Overview

Campaign No. 2012110001, December 2012

TO: ALL MERCEDES-BENZ CENTERS

SUBJECT: Model 166, Model Year 2012

Check Front Air Suspension Struts, Replace if Necessary

This Service Campaign has been initiated because Daimler AG (DAG), the manufacturer of Mercedes-Benz vehicles, has determined that hissing noises at the front axle may be caused by leakage at the air suspension strut in the subject vehicles and may lead to customer complaints. Dealers will check a production date on the struts and if necessary replace one or both front struts at the next workshop visit.

Prior to performing this Service 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 Service 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 11 vehicles are affected.

Procedure

Note:
Use DAS/Xentry 09/12 or higher.

A. Check Production Number on Strut

1. Raise vehicle with vehicle lift until wheels are off the ground.

2. Remove front wheels.

3. Detach covers at suspension strut towers.





4. Detach and close off pressure lines (A, Figure 1) at suspension struts.

Note:
Pressure line (A) must be detached to prevent damage to line.

5. Unscrew nuts (B, Figure 1) at suspension struts at top.

6. Lift vehicle.

7. Have a second person press down suspension struts.





8. Read off production number on adhesive label of suspension strut (LH+RH) using endoscope (Figure 2).

Note:
The adhesive label is located on the back side of the suspension.

9. Compare part number and production number with included list.

^ If production number is not included in the list: Procedure is complete

Note:
> Assemble in reverse order, install new locking nuts (B, Figure 1) then torque nuts (B) to 60 Nm.

> Connect Star Diagnosis.

> Be sure to pressurize both front air suspension struts using SDS prior to lowering vehicle back on wheels and check for leaks.

^ If production number is included in the list: Proceed to subject B.

B. Replace suspension strut, refer to WIS: AR32.25-P-1017GQ.

Note
For referenced WIS document AR32.22-P-8100GZ: Perform only steps 1-3.

1. Assemble in reverse order.





Special Tools

Note (regarding WIS documents referenced in this Procedure):
Replacement of parts not listed in the parts table of this Procedure are not claimable under this campaign. If replacement of additional part(s) is necessary, check coverage prior to submitting under warranty.





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:





Warranty Information