No 2011 Mercury Sable model , but there is a 2011 Ford Taurus
99% sure the Taurus radiator will be a perfect match to the Sable's.
No they do not
No, a Generation 2 (1992-1995) Taurus/Sable Windshield will NOT fit a Generation 3 (1996-1999) Ford Taurus/Sable.
Yes, it is identical.
Yes, it does.
Just one handles the job. See "Related Questions" below for more about Taurus/Sable fuel pumps
Yes, I have them on my Taurus, identical body.
Yes, they will fit.