If your model is still in 2003 or even earlier, it may still be the interface of OBD1. Sometimes when reading and writing ECU, you need to purchase the OBD1 to OBD2 standard protocol of the independent model separately, and the conversion cost is relatively high (about 4$). If it is The converters from factories such as LAUNCH/AUTEL can only be used by some of their devices.
Now this OBD1 to OBD2 adapter cable launched by GODIAG is very cheap, and the interface is directly converted according to different models.
So what kind of jumper wire do you want us to release?
For Benz?
For VW?