These lights are plug and play, same as the rear lights. Ive got them both. Only one thing with the front lights is if you want the Led to come on when you start the car up like with the audi cars then you have to vag com to set it up or like me just put them on when you feel like it by turning your side lights on
Do you have pics of them on our leon? As would like to see how they look and which ones you went for on the rear