Mercedes refreshes the AMG GT for 2018 and adds a GT C coupe

The GT C coupe rounds out the GT lineup, and provides a hardtop choice for those that seeking something faster than the GT S, but don't want to stretch to the GT R.

It also will launch in an exclusive Edition 50 model to celebrate AMG's 50th anniversary. Only 50 coupes and 50 convertibles will be built in this trim. The GT and GT S also get visual changes and a bump in horsepower.

Starting with the GT C coupe, seen in Edition 50 guise here, it's pretty much just a GT C roadster with a fixed roof. The engine output remains the same at 550 horsepower and 502 lb-ft of torque. The 0-100 km/h time is also the same at 3.6 seconds. The GT C coupe also shares the roadster's more aggressive front bumper along with its haunches that measure 2.25 inches wider than a normal GT or GT S. The aggressive body covers up other GT C mechanicals, including the rear steering and electronically controlled limited slip differential. Top speed of the coupe is 317 km/h, which is one mph faster than the convertible, and the coupe weighs 77 pounds less at 3,583 pounds.

As for what makes the Edition 50 special, it comes with many visual goodies. The car is coated in a matte finish called Graphite Grey Magno and features a smattering of black chrome accents on the trim, diffuser, and more. Inside, the Edition 50 gets silver and black upholstery accented by silver seat belts, matte carbon fiber, and gloss black trim as part of the standard AMG Interior Night package. That package is optional on GT and GT S models.

Those lower level GT models see some notable changes for 2018. Right up front is the now standard AMG Panamericana grille, which features 13 slender vertical bars. The front bumper is also more aggressive thanks to a larger lower grille that was clearly inspired by the GT C and GT R models. Behind that fascia is the AIRPANEL active grille shutter system from the GT R, which can optimize either aerodynamics or engine cooling depending on need. Even further back in the GT or GT S, is a tweaked twin-turbocharged 4.0-liter V8. In the GT, it now makes 13 more horsepower and 22 more lb-ft of torque for totals of 469 horsepower and 465 lb-ft of torque. The GT S jumps by five horsepower to 515 and 15 lb-ft of torque to 494 lb-ft.

The GT refresh also brings along new options and packages. These include new wheels plus a gloss black interior trim package and carbon fiber exterior package. The most interesting, though, is the AMG Track Pack. It is available for every iteration of the GT and it allows the driver to record data including speed, steering angle, acceleration, and lap and sector times with an iPhone. The camera can also record video to go along with the data, and it can all be shared on Facebook, YouTube, or the AMG Private Lounge website.