No thing to major really mate, few problems with wiring as using the fuse box/front end wiring from the early MK5 but the rear loom from the face lift, the muti-plug fits into the fuse box but a lot of wires are in different places so had to move pins around in plug. Thermostat housing got a hair-line crack even tho its quite new then just parts not fitting and the waiting from Hispec then to find was a few missing bits in there kit but they sorted that right away to be fair