I have been reading a good book on Bosch Fuel injection by Charles O Probst and Bentley publishers. I am at the chapter on KE injection that my 1992 Mercedes 300-E has. One of my questions is they show two air flow sensors one is a down draft and one is updraft. Can some one tell me which one I have?

Second question is it seems the fuel mixture adjustment has been sealed by the factory so you can not make adjustments. I have read several places were the small ball inserted in this adjustment is drilled out. what is the opinion of other owners who found this ?

Bob Geco

That is a downdraft air flow plate assembly.

Yes, the tower can be replaced OR shortened just at the bottom of that ball.

__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator

http://www.landiss.com/mixture.htm

__________________
-Marty

1986 300E 220,000 miles+ transmission impossible
(Now waiting under a bridge in order to become one)

Reading your M103 duty cycle:
http://www.peachparts.com/shopforum/showpost.php?p=831799&postcount=13
http://www.peachparts.com/shopforum/showpost.php?p=831807&postcount=14