mercedesbenz Workshop Repair Guides

Mercedes Benz Workshop Service and Repair Manuals

Fuel Systems|Page 3583 > < Diagram Information and Instructions|Page 3580
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Fuel Pump Relay: Description and Operation
Fuel Systems

The fuel pump relay controls operation of the fuel pumps.
The relay is energized only during engine cranking or while the engine is running by the CIS-E control unit. If the engine stops with the ignition turned
(ON), the CIS-E control unit will interrupt the ground circuit for the fuel pump relay. 

Fuel Systems|Page 3583 > < Diagram Information and Instructions|Page 3580