I installed it myself on my preferred plus. I would say someone moderately mechanically inclined can do it.
it requires removing the cover where the rear view mirror is,front sensor cover, and sun glass overhead console. You need to tap into 3 wires. Taps are provided.
the instructions are here:
it requires removing the cover where the rear view mirror is,front sensor cover, and sun glass overhead console. You need to tap into 3 wires. Taps are provided.
the instructions are here: