Thanks guys.
I build the led/sw tool yesterday. I was lucky I had all the requiered materials at home including a 12V led. Assembly took only 10 minutes. Thanks Arthur. It's a very simple and usefull invention !!
Then, I went to read codes in my 95 W124 E320 and found a completly different situation and got totally lost.
My car has the 16 pin connector (square, next to the battery) but it only has real connectors on pins 1, 6, 7, 8, 10, 13, and 16. Other numbers are just empty holes w/o connector. So, I can't read codes on pins 3 and 14 as suggested.
I decided to give it a try and got this:
Ground conected to pin 1.
Positive (12V) conected to pin 16.
Plug test lead into pin 6 and got codes number 4, 5, 6 and 8 ???
Plug test lead into pin 7: led always on. No blink. No codes.
Plug test lead into pin 8: nothing happend. No codes. No blink.
Plug test lead into pin 10: nothing happend. No codes. No blink.
Plug test lead into pin 13: one blink. No codes?
I just don't get it. Any imputs ?
Thanks again.