Still working on my 1988 300 SE. Someone sent me a copy of 073-121 Testing electrical components of CIS-E injection system. In this write up the control system still shows a 25 pin connector used at the control unit N3.


The 1988 300SE does not have a N3 control unit. The N3 function has, as far as I can find, has been incorporated into the computer module. The computer module is connected with a 35 pin connector. Does anyone have access to a pin out sheet for this 35 pin computer connection?