Hello guys, i'm planning to install oem bi-xenon on my 2.0 TDI Audi A3 2005. Till now i've bought the 2 headlights including the xenon bulbs and the electronics units, the command unit - 1T0 907 357, the two leveling sensors and the wires. I will also have to buy the headlight switch. My question is if there is something else that i need to take into consideration before i will put up everything. Thank you!