OBD for Mercedes Sprinter: Diagnostics & Repair

"Hi, my father has a Mercedes-Benz Sprinter, model year 2001, 313CDI, and for some time now, the preheating indicator light has been coming on for a few minutes about 30 seconds after starting the engine. Also, the engine seems to have relatively low power since then. So, I thought I'd check it with OBD, but no luck. The connector for the KKL interface that I use for my Golf doesn't fit here, because Mercedes, of course, uses its own round connector, which is completely unnecessary. Well, it's not a huge deal to read the data just once, so I thought I could just clip it on with alligator clips. But on this car, every control unit has its own pin. I have the pinout information, also from OBD, but does anyone know if I need the K or the L wire?"

Thank you in advance for your help.
Best regards, Thomas.

http://shop.dieselschrauber.de/images/obd2_diagnose_lt_sprinter.jpg

Please provide the text you would like me to translate from German to English. I will then provide the translation without any explanations.
http://shop.dieselschrauber.de/product_info.php/cPath/25/products_id/51/

-Uwe-

Hello,

If the preheating indicator light is illuminated or flashing, there is usually a problem with your glow plugs (one or more are defective), or with the preheating fuse/relay.

If there is an error in the engine control unit, the EDC warning light will illuminate.
Please check your spark plugs and the 80A fuse strip in the engine compartment.

I tried using this adapter with a Sprinter van manufactured in 1996, but it didn't work. Probably because that vehicle doesn't support OBD.

chli1976 wrote:

I tried using this adapter with a Sprinter from 1996, but it didn't work.

Probably because that vehicle doesn't yet support OBD. }
Is it expected... and is access possible via control unit address 01?

Best regards, Rainer.

I tried using both 01 Motorelektronik and OBD II.