500SEC (140.070) V8-5.0L (119.970) (1993)
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Brake Fluid Pump: Description and Operation
Vehicles with ESP
ESP Charging Pump
Location
Behind trim on left front fender.
Task
The ASR/ESP charging pump (M15) charges the high-pressure/ return pumps.
Design
The suction line leads from the tandem master brake cylinder to the charging pump. The pressure line leads to the pressurizing piston unit (14). it
is designed as an internal shaft gear pump. The pressure in the charging pump is limited to 15 bar by a pressure limiting valve.
Charge Plunger Unit
Location
Behind lining on left front fender.
Task
The pressurizing piston unit is a hydraulic connecting component in the brake circuits between the tandem master brake cylinder and the ESP
hydraulic unit.
Design
