Mercedes Benz GLS Price in USA Starting From USD 157,160 to USD 355,120. The Mercedes Benz GLS is a new 4,7 seater SUV Car that comes with a Diesel and Petrol Engine Type, 2925 cc while the Petrol is 3982 cc Engine Displacement, 549hp Power, and 730Nm Torque of engine. Depending upon the variant and fuel type the Benz GLS has a mileage of 12.50 kmpl .This car comes with 8 cylinders and has length of 5205mm, width of 2157mm, and a wheelbase of 3135mm.