On my 124.030 with the 103.983 eng ,The X92 8 pole diagnostic connector only has sockets at locations
1=ground
6=SRS
7=a/c
all others are blank! the manual shows 3=CIS-E CFI. 3 is the one I wanted to look at with my LED code reader because the car is running like crap except warm at highway speeds.
Is it normal for this car to be missing these other systems? The way I am reading the manual for the 124 88 is the first year that should have this system??? date of manufacture is 05/88 (happy birthday) car.
Am I to use the 9 pole X11 pins 2+3 to read lambda values only?
So X92 only has 3 out of 8 holes filled and one of them is a ground

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88 W124 3.0
96 R129 119eng
06 ML350
98 ML320 sold
02 CLK55 amg