The Mercury Mariner is a compact crossover SUV that was introduced in 2005. When Ford eliminated the Mercury brand, the Mariner ended production in October 2010. While the Mercury Mariner 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, some model years require two previously programmed keyless entry remote fob smart keys.