FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
Courtesy of Operation CHARM: Car repair manuals for everyone.

GF32.32-P-1011CW Damping Valve Unit, Component Description



GF32.32-P-1011CW Damping valve unit, component description
- with CODE (483) ADVANCED AGILITY package

Component Identification:





Location
The damping valve units are located in the lower area of the respective dual-tube gas-filled shock absorber.





Function sequence when jouncing
(Shown on left front axle damping valve unit)
During jouncing (compression stroke), the oil pressure rises in the lower chamber under the main piston (4), causing the check valve (6) in the main piston (4) to open and the check valve (5) in the bottom plate (3) to close. The oil in the lower chamber of the inner damper tube (2) flows via the check valve (6) in the main piston (4) to the upper chamber of the inside damper tube (2) and from there to the left front axle damping valve unit via the feed duct. More or less oil can be allowed to flow through the restriction point by changing the cross-section in the left front axle damping valve unit. This is actuated by the adaptive damping system control unit. The damping behavior then becomes correspondingly softer or harder. The oil flows into the outer pipe (1) of the damper via the return line.

Task
The damping valve unit regulate the damping behavior of the shock absorbers. They are actuated by the adaptive damping system control unit (N51/5)





Function sequence during rebound
(Shown on left front axle damping valve unit)
During the rebound (pull) stroke, the check valve (6) in the main piston (4) is closed and the main piston (4) moves upward, pressing the oil in the upper chamber of the inner damper tube (2) through the duct to the left front axle damping valve unit. More or less oil can be allowed to flow through the restriction point by changing the cross-section in the left front axle damping valve unit. This is actuated by the adaptive damping system control unit. The damping behavior then becomes correspondingly softer or harder. The oil flows into the outer tube (1) of the damper via the return line and the increased pressure on the check valve (5) in the bottom plate (3) causes it to open and the oil flows from the outer tube (1) of the damper into the lower chamber of the inside damper tube (2).