In a word - yes!

This assumes that it isnt factory fitted dark glass (which it almost certainly wont be)

My M5 had window tints that looked ghastly! Far far too dark.

the rule of thumb is that the better the tint, the easier it comes off I think. they usually peel off with a razor blade - but go careful!

The one to be really careful off is the rear window - dont forget the demister element -you can easily damage it if not careful!

JJ