there's a TSB about this problem, here it is.
TSB 07-16-7 EXTERIOR DOOR HANDLE NOT FLUSH IN THE CLOSED POSITION
ISSUE:
Some 2005-2008 Mustang vehicles may exhibit an exterior door handle not flush in the closed position. This may result in a loose handle, rattle noise, hard to open, and/or door self locks when opening outside handle.
this is just a TSB, not cover if your out of warranty.
TSB 07-16-7 EXTERIOR DOOR HANDLE NOT FLUSH IN THE CLOSED POSITION
ISSUE:
Some 2005-2008 Mustang vehicles may exhibit an exterior door handle not flush in the closed position. This may result in a loose handle, rattle noise, hard to open, and/or door self locks when opening outside handle.
this is just a TSB, not cover if your out of warranty.