Sorry for replying to you so late.
For Volkswagen in 2008, there is a battery drain problem, you need to buy a CANBUS simulator or gateway.
If you have an 8-button multifunction steering wheel, you must install a CANBUS simulator. Otherwise, the RCD330 plus cannot be controlled by MFSW.
CANBUS has two functions to solve the battery drainage problem and the control problem of the 8-button multi-function steering wheel.
For the unit, you can choose one from the links below.
1.Standard Original Edition
2.Standard original unit + rear USB.
3.Standard original unit + rear USB+ wireless carplay dongle