Upgrading to led lights are easy, car must come with convenience pack not sure if due to light sensor,
cables need changing both side, so find a crashed leon with led as standard and cut the headlight cable off and attach it to yours and voila, if lights start flashing remove the battery and wait 20 minutes or more then plug it in and works fine.
cars equipped with range control and auto dim light switch/nigh driving mode needs something done on vcds I don't have vcds and don't know if will ever work on them cars, but it works on standard FR but coming home has vanished from the infotainment don't know why.
try at your own risk