Originally Posted by elistan
The Lexus IS cars don't have split folding rear seats either, not even as an option like with the F30. It's one of the reasons why we didn't get a Lexus. Never assume.
(We have a 2013 which, as stated above, fortunately comes with them standard.)
if its not an option usually its because the car is designed around not having folding seats. increased structural rigidity and 1 less rattle.
though in a sedan you'd expect them to design it in, since well sedans are supposed to be practical.