Hello, I have a 1990 190e 2.6. I built a homemade code reader and I can pull codes but I do not know which system the pins are for. This is because the MB manual says it should have an 8 pin diagnostic socket but I have a 16 pin socket! Only pins 1,2,6,7,and 14 are used and pin 1 is the ground pin. Can anyone please direct me to the individual system each pin is for?

Another question is regarding the 9 pin diagnostic socket by the electronic ignition on the driver’s side engine bay. Are there any guides to recovering and using the codes from this socket?

Thanks