mercedesbenz Workshop Repair Guides

Mercedes Benz Workshop Service and Repair Manuals

Vacuum Switchover Valves|Page 7319 > < Air Door Vacuum Solenoid Valve, HVAC|Locations
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Air Door Vacuum Solenoid Valve: Description and Operation
Vacuum Switchover Valves

Switchover Valve Unit

PURPOSE

The switchover valves, which are located behind the glove box, connect the vacuum elements which operate the various distribution flaps and the heater
valve with the vacuum source.

CONSTRUCTION

The switchover valves consist of a plastic vacuum manifold fitted with electrically operated solenoid valves. There are two manifolds, one with four
electric solenoids and the other with five electric solenoids.

OPERATION

While the engine is running, vacuum is supplied to the switchover valve manifolds. A vacuum reservoir supplements the system during periods of low

Vacuum Switchover Valves|Page 7319 > < Air Door Vacuum Solenoid Valve, HVAC|Locations