SL/R129: M119 Fuel injection regulator leak
11-12-2021, 09:46 PM
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17 E220d all-terrrain, 92 SL500, 16 C250D Wagon, 16 A200 (wife)
M119 Fuel injection regulator leak
Hi people, car is running fine but smell of fuel after halted, and it's coming out of a small vent in the regulator body.
I've seen one mention for someone that has seen this, and replaced it.
My question is - could this just likely be the 2 o-rings leaking and its finding its way back around the body to pop out where I saw it, or is it likely the valve itself has an internal leak.
(Man the thing is heavy for its size. Real old-school construction.)
Does it just on/off the fuel when the car is running / stopped? Seems unlikely it would actually regulate the pressure, but maybe it does?
Bosch part2437020007
Thx Greg
I've seen one mention for someone that has seen this, and replaced it.
My question is - could this just likely be the 2 o-rings leaking and its finding its way back around the body to pop out where I saw it, or is it likely the valve itself has an internal leak.
(Man the thing is heavy for its size. Real old-school construction.)
Does it just on/off the fuel when the car is running / stopped? Seems unlikely it would actually regulate the pressure, but maybe it does?
Bosch part
2437020007 
Thx Greg
12-31-2021, 05:14 AM
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17 E220d all-terrrain, 92 SL500, 16 C250D Wagon, 16 A200 (wife)
Well an update for others. Wasnt just the o-rings, was the unit and replacing it fixed the problem. Fuel economy now a bit better, with no leaks!
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Ahmed (01-02-2022)
