For almost every vehicle on the market, product cycles typically last six to eight years. At the end of that run, the vehicle gets a redesign with either a new or significantly improved structure. That’s not the case for the Mercedes-Benz G-Class. First released in 1979, the G-Class has never been redesigned. Instead, Mercedes has opted to continually update the interior appointments, powertrains, and tech features of the “Geländewagen”—as it’s called in its home country—and that's precisely the case for the reworked 2016 model.

The changes for 2016 are mostly minimal. The front bumper and gauge cluster are revised, adjustable shocks with Sport and Comfort modes are newly available for the base G550, and a series of bold new colors is offered.

However, there’s some pretty important stuff going on under the hood. The G550 switches from a naturally aspirated 5.5-liter V-8 to Mercedes’ new twin-turbocharged 4.0-liter V-8. Output increases from 388 horsepower and 391 pound-feet of torque to 416 horses and 450 lb-ft of torque, and Mercedes says fuel economy improves by 17 percent as well. The G63 AMG model’s twin-turbocharged 5.5-liter V8 also gets a power boost from 544 to 563 horsepower while torque remains the same at 560 lb-ft. Finally, 2016 marks the return of the G65 AMG. Powered by a 6.0-liter V-12, the G65 produces a whopping 621 horsepower and a stump-pulling 738 lb-ft of torque.

source: Motor Authority