OK... I have a Euro M103 engine with KIS (I think) I have the 8 pin diagnostic socket, but no LED or button that some people have mentioned... is there any way I can check the codes... I presume I just need to put a 12v lamp between 2 points, and connect another 2 points to display the codes

Actually if you use a LED it will work. Just connect the positive side to the pin to be tested and the negative to the ground. Now just jump a wire from the pin to be tested to ground for 3 seconds and the LED will flash the code.

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Benzmac:
ASE CERTIFIED MASTER AUTO TECHNICIAN
SERVICE MANAGER FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM

Which is the most common pin to use?

I have a list of codes...

I assume its Pin #3 for the sensor fault codes... also, what voltage of Led? 2ishV? or 12V?

Thanks....

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Brian Drought
1991 300CE
http://www.users.globalnet.co.uk/~drought/
ICQ: 2180069

Thats a good question. I guess a 12v. I used the Led out of an old window switch for the 3ooE and it worked fine.

You need to get a book that tells you which pins to use and what the codes mean.

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Benzmac:
ASE CERTIFIED MASTER AUTO TECHNICIAN
SERVICE MANAGER FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM