300SE (140.032) L6-3.2L (104.990) (1992)
Brake Fluid Pump: Description and Operation
ASR Charging Pump
Charging Pump
The ASR charging pump (M15) is at the brake booster under the tandem master cylinder. The pump is a gear-type. The ASR charging pump can produce
a maximum pressure of 8 - 12 bar (116 - 174 psi). Line BA connects it with the ABS/ASR hydraulic unit, and the ABS/ASR control unit operates it
directly.