I searched this forum before I had my windows tinted and didn't find any threads about tint on the X260, quite a few in the X250 forum.
I just had mine done last week at 30% all around including the almost clear 80% on the windshield. Added a full front clear-bra also.

I'm very happy with it and glad I didn't go darker, I really considered the 15% which is pretty dark, I was concerned it would be too dark at night, looks nice on other cars though.
The place I went to even does the Limo Tint 5% and most employees at the shop had this in their personal cars, doesn't seem to be an issue in CO.
I'd like to see what others have done or do the majority leave it as it came from the factory. ?




The Before pic as a comparison


Before Tint

 

Looks great! Been thinking about getting the same tinting done as well; I got a Black XF so it pretty much screams to be tinted. I have to be careful though because our state has laws against tinting. I don't want to pay to have it done only to be pulled over and fined if I don't get it removed. A coworker was pulled over and ticketed 4 times before he removed his tint.

 

I have a black R-Sport and its dying to be tinted- looking to get it done and possibly a chrome delete this weekend. Going 25% all around (TX Limit) and will toss in the challenge of an eyebrow tint on the front.