This is for Simon, but thought I would share with the forum...

I pulled the fuel rail and injectors to get product numbers and hopefully flow rates... Photos to follow... There is definitely the MB logo again, like everything else, and the MB part number is also stamped on one side A1120780149... On the other side is this number 0280156014... At the wire connection point are 3 separate code numbers imbedded in the plastic housing (060) or (090) and (391) and (D) I'm assuming the (060) or (090) depending how you look at it, is the flow rate...

I also found the same unusual logo that was stamped into the 02 sensors and it is so small that I am unable to get a decent photo... I'm guessing it's the Bosch logo... It is a circle that has "II" in the center with a conical top and bottom attached to the "II"... I know this is a tough one, but any ideas ?