I've decided to wrap the window trim on the e92, will be getting the kidney grills done as well so they match.

I'll be getting the rear 3 windows tinted while I'm at it and the question is what percentage do I tint them 18% or 35%? Any pictures of percentages would be great! Is there anything I should know about tints? will they effect any functions on the car (radio signal etc)?

Finally, I was quoted 99 euro to tint the rear 3 windows (special offer) but window trim is 100 euro and grills are 40 euro... Does that sound reasonable?

As always any help/advice will be greatly appreciated