Hi, I have a 2014 Octavia RS 162TSi. I’ve found a 2020 RS at a wreckers with the full touchscreen CarPlay/android auto head unit. Will that head unit work in my 2014? I’d like to use it to update to CarPlay...

Yes BUT:

 

1) you'll need to change the USB cable to the CarPlay compatible one

 

2)you'll need to have Component Protection removed and the SWaP codes re-enabled (both of which need a connection to the Skoda servers), then you'll need the coidng and adaptation checked to match your car