Abd with the destiny to learn a lot here
I have a BMW from 2004 with a 320d 150ps Engine Abd a mercedes s420cdi w221.
My english skills are not the best but i hope they will be good enough to understand and make you understand.
First i have to look for the right programms to read and rewrite maps.
I know winols but dont know what the full Potential of this program is.
I know that it is possible to change the BMW through OBD2.
But i know nothing for the mercedes. And because its much more expansive and complicated i want to start with the BMW.