yea tinting the all five windows, (excluding the front) is illigal in most states and provinces. And Although it's illigal, shops will tint ur windows anyways. By the way..not a big deal. Not even worth mentioning to the insurance..Even the cops are too damn lazy to pull u over for slight tints.. Unless the tinit it UBER UBER LIMO tint si the cops can't tell if u're pointing a gun at them as u drive by for fun.
Fine line between it being a security issue and a customising issue. The stuff that I had on my last MCS was made up of millions of tiny metal fibres so acted as a security barrier against thieves breaking into my car...but....it looked so fantastic....could be seen as a customisation therefore encouraging thieves to steal it!!
Well its being done by the dealer and it is (according to them) legal. I don't remember the %'s offhand. I'll be picking the car up TODAY (ie in about 1.5 hours!!!) and I'll post some pictures on here asap.