Switchover Solenoid Valves
WARNING: This page does not describe the selected car, but rather 26 other vehicles, including the 1999 Mercedes-Benz SLK230, 1999 Mercedes-Benz ML430, 1999 Mercedes-Benz ML320, 1999 Mercedes-Benz E430, and 1999 Mercedes-Benz E320. However, it is still accessible from the selected car via links, so may be relevant.
Switchover solenoid valves for front or rear axle circuit shut off the line system between wheel brakes and master cylinder during ESP control. They are designed as a pressure limiting valve at the same time and open at about 2537 psi. Brake fluid discharging through switchover solenoid valves is dampened by pressurizing piston unit and fed back into master brake cylinder through pressurizing piston.