There will be different kinds of engine options depending on the trim where the GLS is concerned, where you can leave most of the regular road users eating dust with its powerful AMG engine to an efficient diesel make. The economy option would be the GLS350d that runs on a 3.0-liter V6 diesel engine that churns out 255 horsepower and 455 lb-ft of torque. For those who settle for the 3.0-liter twin-turbocharged V6 gas engine GLS450, you get 362 horsepower and 369 lb-ft of torque.
Then there is the big daddy of them all, the Mercedes-AMG GLS63 that has a gas guzzling 5.5-liter V8 engine that sports 577 horses underneath the hood, being mated to a seven-speed automatic. Orders will only kick off from this December onward, with deliveries happening in March 2016. [Press Release]