aka Reference Mark Sensor
2 flat pins/spade connectors located inside recessed plug
When this part fails, it causes a "No start" condition, generally when the engine is hot. It may work again when the engine is cold but, will again fail at operating temperature.
Manufactured in Europe by FAE, quality European electrical parts since 1952
Located at end of fuel rail , 90 degree plug.
A DODGE OR MERCEDES DEALER WILL ONLY SELL THIS ITEM AS PART OF THE ENTIRE FUEL DISTRIBUTION RAIL ASSEMBLY AND NOT AS A SEPARATE ITEM. THIS IS THE RECOMMENDED MANNER IN REPLACING THIS REGULATOR.
THE COMPLETE RAIL IS SHOWN BELOW
YOU MAY PURCHASE THIS ITEM SEPARATELY BUT, WE CANNOT GUARANTEE THAT IT WILL CURE YOUR PROBLEM AND THEREFORE, THERE WILL BE NO WARRANTY RETURNS ACCEPTED FOR THIS ITEM, AS REPLACEMENT OF ONLY THIS VALVE IS NOT RECOMMENDED BY THE VEHICLE MANUFACTURER.
Located at end of fuel rail
Only for early OM 612 engine, 2002 and early 2003 engines.
90 degree plug connection Check the part number on your existing unit BEFORE ordering. SEE OTHER CONTROL VALVE, SHOWN BELOW
Located at end of fuel rail. This is the sensor with the 90 degree plug connection. The straight connection plug sensor on the opposite end of the rail, is shown below. Check the part number on your existing unit BEFORE ordering. THE OTHER VERSION IS SHOWN BELOW.
The fuel pressure relief valve is located on the high pressure injection pump (front of the engine) This has a tall hex head, which points straight down. This part may be removed and replaced without removing the pump.
This is a fairly common failure item, which often causes the engine to go into limp mode. This sensor is often oil soaked with vapors from oil leak-by from the turbocharger, in the charge air stream . Carrying a spare sensor is suggested, as they are inexpensive and always seem to fail in the middle of nowhere.