I checked the codes and on pin 7 got 13 flashes, on pin 8 got 3, 9, and 11 flashes and on pin 14 got 10 and 14 flashes. If I am reading the codes correctly, these codes are for coolant temperature sensor (pin 7), intake air temperature sensor, O2S (low or high voltage), current too high (pin 8) and engine control module and closed throttle position contact switch (pin 14).

Do you think this points to the wiring harness? I hope not. The car is a 1993 300E with a 3.2 liter 104 engine. Thanks for your help.