hier noch was zur Pumpe, die Radialpumpe fuer Niveau macht 130 bar.
Tandem Pump
The tandem pump consists of a vane pump for power steering and a radial pump for selfleveling suspension. Both pumps are driven by the same shaft and have separate oil feeds for each system.
The radial pump has the capacity to pump 102 liters of oil per minute. The maximum pressure is limited to 1900 Psi (130bar) by the pressure regulator located on the control valve.
http://www.e38.org/selflevel.pdf