The 2009 Mercedes-Benz GL-Class is a large seven-passenger luxury SUV available in three trim levels. The GL320 Bluetec and GL450 are equipped identically except for their power plants and wheels. The 320 comes standard with diesel power and 20-inch wheels, while the 420 boasts a V8 but downsizes to 19-inch wheels. Standard equipment for both models includes a sunroof, dual-zone automatic climate control, MB Tex leatherette upholstery, power-adjustable heated front seats, a power 50/50-split-folding third-row seat, power rear quarter-windows, the COMAND multimedia interface and an eight-speaker audio system with a six-CD changer, Bluetooth, an SD card reader and an auxiliary audio jack.Options for the GL450 and GL320 Bluetec include a Premium I package, which adds a power liftgate, auto-dimming mirrors, keyless ignition and entry, front-seat memory functions, a power steering column, a 115-volt AC power outlet, parking sensors with a rearview camera and a hard-drive-based navigation system with voice activation, real-time traffic and Zagat restaurant reviews. Also part of this package is a Harman Kardon surround-sound system with satellite radio and HD radio. The premium II package includes all of the Premium I equipment plus adaptive bi-xenon headlights, tri-zone climate control and rear air-conditioning. The heating package adds a heated steering wheel and rear seats, while the full-leather package upgrades the already well-crafted interior. In addition, the GL450 and GL320 Bluetec can be equipped with a GL appearance package that adds 20-inch wheels and various metallic trim enhancements.
The GL550 includes most of the above equipment as standard and adds 21-inch wheels and unique exterior styling details. Stand-alone options include an adaptive damping system, a trailer hitch good for up to 7,500 pounds when properly equipped, heated and ventilated front seats, an iPod/MP3 adapter and a rear-seat entertainment system with 8-inch screens.