I've tried de Digiprog 3 with OBD cable, in four cars, Volkswagen Sharan year 2000, Volkswagen Golf year 2002, Opel Astra year 2001 and Audi A4 year 2005 and the device responds:
(error no connection) – http://imageshack.com/a/img856/4716/q01w.jpg
What's going on ??
Replied by Ada on Apr 28, 2014
For the car you test, it belongs to old cars. For cars before 2008, cannot be directly changed by OBD port. You need to use the way to desolder the chips. Choose the car based on the car models, do not directly choose by OBD port way to change the mileage. After you choose the car model, it will prompt you the chip which saved the mileage and the cable you need to work. Then disassemble the dashboard, and find the prompt chip from dashboard, use the prompt cable to connect this chip with digiprog 3. Then you can read and write. For cars which is not done by OBD port, if you use OBD cable to change the mileage, it will prompt the error like you mentioned.