Suspension - Vehicle Lowers On One Side or Corner
Date: October 11, 2006Order No.: P-B-32.50/42
Supersedes:
Group: 32
SUBJECT:
Model 215.373/374/375/376/378/379
Model 220.170/173/174/175/176/178/179, with Active Body Control (ABC) code 487
Model 221.171/176/179, with Active Body Control (ABC) code 487
Model 230.471/474/475/476/477/479
All Model Years
Vehicle Level Lowers on a Single Axle
If you receive customer reports in the above model vehicles of the vehicle's level lowering on a single axle on a single side after an idle time lasting from 1 day to one week, perform the new filter repair method as outlined in WIS document AR32.50-P-0025A instead of the previous flushing method.
Leveling complaints resulting from dirty ABC hydraulic fluid can be rectified just as effectively by filtering as by the conventional flushing method (replacing the hydraulic fluid). The new repair method is possible because the mesh width of the ABC filter was modified from 10 micron to 3 micron. Filtering is of no use if the ABC fluid is dark black or smells burnt. In such cases the hydraulic fluid must be replaced, reference WIS document AR32.50-P-0026A.
NOTE:
Vehicle lowering is generally not the result of a malfunction of a suspension strut. The suspension strut can only be responsible for vehicle lowering if it has an external leak. This can be recognized by an oil fouled boot.
NOTE:
The revised 3 micron ABC filter entered series production as of October 2005.
Parts Information