The 2010 Mercury Grand Marquis is a rear-wheel drive full-size family sedan that offers a spacious interior with seating for six, a comfortable ride and class-leading trunk capacity--all at an affordable price. Its simple, rear-wheel drive, body-on-frame design is a throwback to full-size American sedans of the past, but has come to incorporate many of the safety and convenience features that have now come to be expected in modern luxury sedans.