Quick question,

I'm buying a Sony Headunit: Sony Apple CarPlay and Android Auto Media Player - XAVAX3000 | Supercheap Auto

The Fascia: Aerpro Facia To Suit Volkswagen - 959012 | Supercheap Auto

I've done many cut wire installs in the past but want to keep it nice and clean in this install with a wiring harness but I'm not familiar with Volkswagen installs.

When it comes to the wiring harnesses do I need both of these? Or just the first one?
Aerpro Wiring Harness - suit Sony Head Units 2013+, APP8SP3 | Supercheap Auto
Aerpro CAN Adapter To Suit Volkswagen - CANVW | Supercheap Auto

Cheers,