If you are reading this you may be trying to fit a CANBUS 2.0 headunit in a pre-facelift Roomster/Fabia which are CANBUS 1.6   It is possible, but you need an adapter which needs to be wired between the car and the headunit.   Before you begin The only thing you do in the car is plug everything in.    All the preparation work can be done from a comfortable chair and table/desk. And that is just identifying your wires, plugging things together, and cutting the c