What level of tint should I get on my car?

With 5% tint, u will definitely have to stick your head out the window or open your door to see behind u when backing up at night. 15% is a little lighter than 5% but still dark. With 15%, u probably wont have any trouble seeing when backing up at night if u have pretty good night vision. If i was u, I would get 15% or 20%. I have 20% all around on my ride and I love it.