The Mercury Mountaineer was a mid-size luxury sport utility vehicle (SUV) that was sold by the Mercury division of Ford Motor Company beginning in 1991. The Mercury Mountaineer has keyless entry remote fob smart keys that are onboard programmable, meaning a person can program the keyless entry remote fob smart key with no special equipment other than the keyless entry remote fob smart key programming instructions. As part of the discontinuation of the Mercury brand, production of the Mountaineer ended in late 2010.