S 65 AMG (220.179) V12-6.0L Turbo (275.981) (2006)
Level Control Solenoid Valve: All Technical Service Bulletins
Suspension - Vehicle Lowers After Sitting
VEHICLE LEVEL LOWERS AFTER BEING PARKED
(P-B-32.50/34E, NOVEMBER 24, 2008)
Topic Number
LI32.50-P-046012
Version
2
Design Group
32.50 Active body control (ABC)
Date
09-17-2009
Validity
Model 215.373/374/375/376/378/379
Model 220.170/173/174/175/176/178/179, Equipped with Code 487 (Active body Control)
Model 230.474/475/476/479
Reason for change
Parts information updated/Supercedes DTB P-B-32.50/34e
Reason for block
Complaint:
Vehicle Level Lowers After Being Parked
Cause:
Fault codes stored
Remedy:
NOTE:
The vehicle's level may lower at any of the following: an individual strut, front or rear axle, right or left vehicle side and/or complete vehicle.
NOTE:
For both conditions listed below, large temperature differences in the ABC suspension system between operating and when stationary for an extended
period can also cause the vehicle to lower slightly. The lowering is caused by temperature dependent volume changes in the ABC oil within the
suspension struts. The vehicle can lower up to 10mm when the temperature difference is 30°C (ABC operating temperature 20°C/outside ambient
temperature -10°C).
Condition 1
If a vehicle lowers after being stationary (engine off) within approximately one week, this is likely due to internal leakage in the check valve of the front
(Y36/1) or rear (Y36/2) axle valve blocks. The internal leakage is the result of deposits or contamination on the valve seat of the check valve. In order to
remove the deposits, filter the ABC system (reference WIS document AR32.50-P-0025A).
If the complaint still continues to occur after the above procedure, the respective valve block must be replaced with revised parts, follow the procedure
listed below.
NOTE
For Model 230, corresponding hydraulic lines and a guard plate are also required; refer to the parts information table.