The Mercury Grand Marquis was a full-size rear-wheel drive luxury sedan that was sold by the Lincoln-Mercury division of the Ford Motor Company. In continuous production for 36 years, the Grand Marquis was the longest-produced Mercury. In total, nearly 2.7 million were produced, making it the best-selling vehicle sold by the brand. The keyless entry remote fob smart key option was not yet available in the beginning, but eventually the Grand Marquis had 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.