First generation Mercedes-Benz GL vehicles are 5088 mm (200.31 in.) long, 1920 mm (75.59 in.) wide, and 1840 mm (72.44 in.) tall. In the facelifted variants, length has been increased up to 5099 mm (200.75 in.). In the second generations, size is slightly enlarged, measuring at 5141 mm (202.4 in.) in length, 1982 mm (78.03 in.) in width, and 1850 mm (72.83 in.) in height.
Curb weight varies between 2170 kg (4784.03 lbs.) and 2505 kg (5522.58 lbs.), depending on the variant.
2013 Mercedes-Benz GL (X166) GL 350 (258 Hp) BlueTEC 4MATIC G-TRONIC variant offers great fuel economy for the class - 7.4 l/100 km (31.79 mpg). Most other Mercedes-Benz GL vehicles, however, are less efficient, with the highest consumption in the range being 14.7 l/100 km (16 mpg) (2006 Mercedes-Benz GL (X164) GL 500 (388 Hp) 4MATIC G-TRONIC).
All Mercedes-Benz GL variants use a double wishbone front suspension and a multi-link independent rear suspension.
Mercedes-Benz GL was initially a 5-seater in its first generation. Facelifted and second generation variants after that were changed to offer 7 seats.
The two models do not have any striking differences between them, as the GL is an extended version of the ML, seating 7 people instead of 5.