Mercedes is updating its range of AMG GT sports cars for the new model year.

Mercedes is celebrating the 50th anniversary of its high-performance AMG division with updates to its GT sports car line, along with an all-new model.

For the new model year all AMG GT models feature a new front end design that incorporates a 15-slat AMG Panamericana grille. Other tweaks include a revised lower bumper to accentuate the car's width and larger air inlets to improve cooling.

That new front end also houses some new technology. All AMG GT models will now include an active cooling system known as AIRPANEL. Borrowed from the AMG GT R, the AIRPANEL system uses electric motors to open vertical louvers in the bumper to increase cool airflow to the engine. When not required, the louvers shut to improve airflow around the vehicle.

The AMG GT's 4.0L twin-turbocharged V8 carries over, but that mill is more powerful for the new model year. In base form the AMG GT now boasts 469 horsepower and 465 lb-ft of torque, marking improvements of 13 and 22, respectively. The AMG GT S gains 12 horsepower and 15 lb-ft of torque, raising its ratings to 515 horsepower and 494 lb-ft of torque.

New option packages for the AMG GT and GT S include the AMG Interior Night package (which adds an AMG performance steering wheel wrapped in DINAMICA microfiber and high-gloss black accents throughout) and the AMG Exterior Carbon Fiber package, which adds a front splitter, side fins, mirror housings, side skits and rear diffuser crafted from carbon fiber.

The big news for the AMG GT range is the addition of a new GT C Coupe model. Following the same basic blueprint as the GT C Roadster that was unveiled last year in Paris, the GT C Coupe features a wider rear track, larger wheels, improved aerodynamics, AMG RIDE CONTROL adaptive sports suspension and a rear-wheel steering system. The new model, which slots between the AMG GT S and GT R, also gets an electronic limited-slip rear differential.

Like its open-air counterpart, the GT C Coupe uses a 4.0L turbocharged V8 rated at 550 horsepower and 502 lb-ft of torque. Likewise, the Coupe matches the Roadster's 3.6 second 0-60 run, but edges out the convertible by 1mph with a top speed of 197mph.

In honor of AMG's 50th anniversary, Mercedes will launch the GT C Coupe with a unique "Edition 50" limited edition model. The "Edition 50" treatment will also be extended to the GT C Roadster.

Limited to just 50 units in each body configuration, the Edition 50 package includes designo Graphite Grey Magno exterior paint with black chrome accents on the car's side skirts, front splitter, fender fins, rear diffuser and tailpipes. Wheels also get black chrome accents.

Inside the Edition 50 cars get silver pearl/black nappa leather, performance steering wheel, unique badging and the Night Package fitted as standard.

Pricing for the updated Mercedes AMG GT range will be announced at a later date.

Live photos by Brian Williams.