The variant offering most power is the 2012 Mercedes-Benz ML (W166) AMG ML 63 (523 Hp) 4MATIC SPEEDSHIFT G-TRONIC, with its 5.5-liter V8 engine delivering an output of 523 Hp and 700 Nm of torque.
Fuel consumption varies between 5.8 l/100 km (40.55 mpg) (2011 Mercedes-Benz ML (W166) ML 250 BlueTEC (204 Hp) 4MATIC G-TRONIC) and 14.6 l/100 km (16.11 mpg) (2001 Mercedes-Benz ML (W163) ML 500 (292 Hp)), however, mostly being on the higher end.
First generation variants measure at 4638 mm (182.6 in.) x 1840 mm (72.44 in.) x 1820 mm (71.65 in.), second generation - at 4820 mm (189.76 in.) x 1951 mm (76.81 in.) x 1863 mm (73.35 in.), and third generation - at 4804 mm (189.13 in.) x 1926 mm (75.83 in.) x 1796 mm (70.71 in.).
Mercedes-Benz GL is about 30-50 cm longer than the ML. Other measurements are about the same.