The Mercedes-AMG GT (C190 / R190) is a sports car produced in coupe and roadster bodystyles by German automobile manufacturer Mercedes-AMG. The car was introduced on 9 September 2014 and was officially unveiled to the public in October 2014 at the Paris Motor Show. After the SLS AMG, it is the second sports car developed entirely in-house by Mercedes-AMG. Formula One driver Lewis Hamilton assisted with the development. The Mercedes-AMG GT went on sale in two variants (GT and GT S) in March 2015, while a GT3 racing variant of the car was introduced in 2015. A high performance variant called the GT R was introduced in 2016. A GT4 racing variant, targeted at semi-professional drivers and based on the GT R variant, was introduced in 2017. All variants are assembled at the Mercedes-Benz plant in Sindelfingen, Germany. The interior of the Mercedes-AMG GT was previewed on 16 April 2014. The car made its debut on 9 September 2014 and was officially unveiled to the public in October 2014 at the Paris Motor Show with two engine power output options, the GT, with 340 kW (456 hp), and the GT S with 375 kW (503 hp). The GT generates 600 Nm (443 lb ft) of torque, and the GT S generates 650 Nm (479 lb ft) of torque. Shortly after its introduction, Mercedes-AMG CEO Tobias Moers promised a Black Series variant of the Mercedes-AMG GT. The new high performance variant was called the AMG GT R. The GT S was the Formula 1 safety car for the 2015 season, having made its debut in that role at the 2015 Australian Grand Prix. Since 2018, the GT R has replaced the GT S as F1's current safety car. The Mercedes-AMG family was given a facelift in 2017, along with the introduction of the GT C roadster variant and the Edition 50 model, which is a limited-edition derivative of the GT C variant. The key improvements made as part of the facelift include increased power output from the M178 engine for the GT and GT S variants (10 kW and 9 kW respectively) and the inclusion of the 'Panamericana' grille from the GT3, GT4 and GT R variants as standard equipment for all variants. The GT's exterior design was kept similar to that of the preceding SLS AMG. It features the wide wheel arches, lower bodywork, and fastback sloping roofline of the SLS AMG, but uses conventional forward-opening doors instead of the iconic gullwing style pioneered by the 300 SL in the 1950s. The large bonnet and slim windscreen have been retained. The vehicle structure is made up of 93% aluminium, with the front module base made up of magnesium. The exterior lead designer was Mark Fetherston, whose previous works include the A-Class, the CLA-Class, and SLS AMG. The interior, designed by Jan Kaul, features a large centre console and decorative elements in a leather and carbon polymer design. The trunk offers room for a medium-sized suitcase. The GT uses a front mid-engine, rear-wheel-drive layout, with the engine positioned inside of the vehicle's wheelbase. The spaceframe chassis and body are made out of aluminium alloys, while the boot lid is made of steel and the bonnet is made of magnesium. The suspension system is a double wishbone unit at the front and rear, with forged aluminium wishbones and hub carriers. The car is powered by a 4.0-litre twin-turbocharged V8 engine. The engine is in "hot inside V" configuration—with exhaust manifolds and turbochargers inside the cylinder banks to reduce turbo lag and uses dry-sump lubrication. Power is sent to the rear wheels through a seven-speed AMG SPEEDSHIFT dual-clutch transmission, the GT S variant employs an electronically controlled mechanical limited-slip differential. In a road test, the GT S accelerated from 0–97 km/h (60mph) in 3.0 seconds, completed the quarter mile in 11.2 seconds and attained a top speed of 311 km/h (193 mph). The GT is the entry level variant of the Mercedes-AMG GT family. The engine in this variant is tuned to an output of 350 kW (469 hp) and 630 Nm (465 lb ft) of torque, with the key differences between this and its more expensive siblings being a mechanical limited-slip differential, an absorbent glass mat battery, the lack of the "Race Mode" and "Race Start" mode settings in the AMG Dynamic Select adaptive drivetrain system, the lack of the AMG Ride Control adaptive suspensive system, and a passive AMG Sport Exhaust System. Keyless-Go is also an optional feature, as opposed to standard equipment. The GT is equipped with 19-inch wheels at the front and rear. The GT S is a more highly equipped variant of the Mercedes-AMG GT. The engine in this variant is tuned to an output of 385 kW (516 hp) and 671 Nm (495 lb ft) of torque. The key mechanical differences the GT S gains over the GT include an electronically controlled limited-slip differential, "Race Mode" and "Race Start" mode settings in the AMG Dynamic Select adaptive drivetrain system, AMG Ride Control adaptive suspensive system, an AMG Performance Exhaust System with dynamic flaps, and a lithium-ion battery. Keyless-Go is standard equipment, as is a staggered set of wheels (19-inch at the front, 20-inch at the rear). The GT C is a performance oriented variant of the Mercedes-AMG GT. The engine in this variant is tuned to an output of 415 kW (557 hp) and 502 lb ft (681 Nm) of torque. While the GT C retains the key mechanical differences the GT S gains over the GT, it also has a wider body (2,007 mm (79 in)) and active rear steering, which the GT S does not have (even as options). In the United States, the Lane Tracking and AMG Dynamic Plus option packages are standard equipment on the GT C. A limited-edition model, the Edition 50, was released as part of the debut of the GT C variant at the 2017 Detroit Auto Show. The GT R is a high-performance variant of the Mercedes-AMG GT and was introduced at the Goodwood Festival of Speed on 24 June 2016. The engine in this variant is tuned to an output of 430 kW (577 hp) at 6,250 rpm and 700 Nm (516 lb ft) of torque at 5,500 rpm. The GT R accelerates from 0 to 100 km/h (62 mph) in 3.6 seconds and has a claimed top speed of 319 km/h (198 mph). While the GT R retains the key mechanical differences the GT C gains over the GT S, it also gains manually adjustable coilover springs, an active underbody fairing, a manually adjustable rear wing, and a 9-mode AMG Traction Control system. As befitting of a high-performance variant, the GT R loses Keyless-Go, the integrated garage-door opener, the heated and power-folding side mirrors, the auto-dimming interior and exterior mirrors and reverts to the basic light-weight 4-speaker audio system that the GT comes with. When it was launched, the GT R had several cosmetic changes compared with the standard car, notably the vertical slats in the front grille, an adjustable rear wing, new front air intakes and new front and rear diffusers. The styling of the GT R is more comparable to that of the AMG GT3 race car. However, the base GT variant gained several of these cosmetic changes as part of a mild facelift in the 2017 model year. The GT R went on sale in November 2016, with deliveries beginning in 2017. The GT and GT C roadsters are the roadster versions of the GT and GT C coupes, and were announced shortly after the introduction of the GT R variant. Both variants made their debut at the 2016 Paris Motor Show. The GT and GT C roadsters utilise the active air management system found on the GT R variant to help with cooling and airflow performance. The GT C roadster retains the wider bodywork of the GT C coupe, and the GT roadster has a slightly higher first and lower seventh gear with a longer final drive compared to the GT coupe. The GT and GT C roadsters feature a three-layer fabric roof built around an aluminum, magnesium and steel structure, available in black, red or beige, and which can open and close in 11 seconds up to speeds of 50 km/h (31 mph).