The VAG concern produces many different cars: gasoline engines, diesel engines and hybrids.
As dear baner said, you need to know what we are talking about, what kind of car.
ODIS will not help.
For the EDC/MED16 series, KESS (reading and writing via OBD) basically does an excellent job - not an advertisement.
For the EDC/MED17 series, it is necessary to remove the ECU and perform the procedure "on the table" (stand). In this case, you will need more expensive equipment and related software - there is a lot of it and it depends on "how much money you are willing to pay" (for the equipment).