SL 500 (129.067) V8-5.0L (119.982) (1996)
Air Pressure Limiter Valve: All Technical Service Bulletins
Suspension - ADS II Valve Unit Whistling Noises
Date: February 27, 2009
Order No.: P-B-32.32/76
Supersedes:
Group: 32
SUBJECT:
All Model 129 Vehicles, as of VIN F125158
Equipped with Sales Code 216c (Adaptive Damping System (ADS II) with Electronic Level Control)
Whistling Noise from the ADS II Valve Unit
If you receive customer reports in the above model vehicles of a whistling and/or hissing noise from the suspension's adaptive damping system valve unit
while in control mode, replace the pressure holding valve (Figure 1, arrow) and then raise and lower the vehicle three times using the level control switch
(S77/1s2).
Note:
This noise is caused by tolerance variations which result in airflow vibrations.
Parts Information