Hi Jim

Thanks. I will look into the Trisco scanner in more detail. It seem to solve the tool-problem for a reasonable amount of money.

But, still, I would very much like to know more details about how the 38-pin connector works for my car (1998 CLK 320). If I know that, I may be able to do my own diagnostic scanner PC-program.

Anybody that can shed any light over this ?

/Michael

Reviving an old thread, go me!

anyway I've got a 95 E320 wagon and a 95 E420. both have the LED as well as the X11 multipin connector. I apparently need to go build the DIY LED tester and then check for codes becuse my E420 is way sick.

I am a little confused as to what is analog and what is digital, are my 95's both?

Your cars are both OBDI flash code reading only, and you have two different connectors - the 320 is 16 pin and the 420 is 38 pin. It's the same code reader but requires different sized pins - the Radio Shack banana plugs for the 320 and about 20 gauge wire for the 420. The 16 pin has a built in LED but the 38 pin does not, although it may have a separate 8 pin connector nearby that does have an LED.