Once you go leather, you never go back that's my opinion anyway.
Apart from some spare time to fit it all you will need the loom & digital climate control panel or manual heater control panel with heated seats but you will need to buy the correct part as you will have digital or manual control panel depending on your models spec.
Digital climate control panel with A/C part no.
1K0907044DEDigital climate control panel without A/C part no.
1K0907044AGManual heater control panel with A/C part no.
1K2820045B The value of your interior all depends on the condition and also if anyone is after that interior at the time your selling.