The latest spy shots show a prototype undergoing testing with a series of aerodynamic changes
This prototype has a slightly different front bumper from other versions seen previously
A more prominent rear spoiler is another change
The GT is set to use an all-aluminium AMG 4.0-litre V8
Twin turbochargers will aid the V8 in delivering 503bhp and 479lb ft
The new GT is 2cm shorter than the SLS and its wheelbase is shorter too
The Mercedes features conventionally hinged doors, unlike the gullwing-equipped SLS that preceded it
Mercedes-Benz design boss Gorden Wagener has said the GT represents a “paradigm shift” in car design for the manufacturer
The design chief also pointed out that he is keen for the AMG GT to be regarded as a new chapter for Mercedes
This teaser image revealed the Mercedes' profile
These design sketches hinted at the Mercedes' appearance
The Mercedes-AMG GT is expected to cost around £100,000
This Autocar render illustrates what the Mercedes might look like
The new all-alloy V8 produces 503bhp and 479lb ft
The two-seater's interior borrows design elements from the C-class
Mercedes' latest COMAND media system features
The GT is Mercedes' successor to the SLS supercar
Mercedes has firmly targeted the Porsche 911 Turbo as the car's closest rival
After a long winter testing phase, development on the GT moved back to the Nürburgring
The GT is expected to be revealed in September
Power in the GT comes from a 4.0-litre V8 engine that shares design features with the four cylinder found in the A45 AMG
Mercedes is said to be targeting a 0-62mph time close to the 911 Turbo, which means close to 3.4 seconds
The GT has also undergone an extensive winter development programme
New pictures have revealed a GT undergoing testing with a series of minor aerodynamic revisions, including a seemingly lower ride height, a fixed rear spoiler and a restyled front bumper. Mercedes has also recently revealed a profile shot of the car and some interior details.
Previously, spy images had shown the car being tested at the Nürburgring. The all-new sports car was a regular sight at the 'Ring last year, wearing heavier disguises, before development moved to the winter testing phase.
Aready described as being "the most beautiful car we've ever designed" by Mercedes' design chief Gorden Wagener, the GT will replace the larger and more expensive SLS in Mercedes' line-up when it goes on sale next year. Speaking to Autocar earlier this year, Wagener said: "You'd think it was hard to top the SLS.”
Wagener said that those who have seen it have been comparing it to the Jaguar E-type, although he believes the GT "has more timeless classical lightness to it".
Mercedes is said to have targeted the Porsche 911 Turbo for performance, meaning it'll be looking to beat that car's 0-62mph time of 3.4 seconds, as well as its top speed of 195mph. Mercedes sources have already hinted the firm may have already come close to those targets.
Powering the GT is a new twin-turbocharged 4.0-litre V8 engine with 503bhp and 479lb ft of torque. That engine is also set to appear in the C63 AMG, and shares its architecture with the turbocharged 2.0-litre in-line four-cylinder unit found in the A45 AMG and the CLA45 AMG. The engine is mounted low and well back inside the engine bay of the GT, giving it better weight distribution.
Other features of the GT include a seven-speed dual-clutch automatic transmission mounted to the rear axle assembly, as well as a mechanical locking differential. The Mercedes' gearbox is essentially an upgraded version of the unit used in the SLS, although this time it includes an automatic stop-start function for extra fuel economy.
The GT's predominantly aluminium structure, as well as other weight-saving materials, is said to have pushed its kerb weight down to around 1550kg, some 145kg less than the SLS.
In its search for class-leading driving dynamics, Mercedes has given the GT a number of shared SLS components, but updated its geometry significantly. The new sports car includes an electro-mechanical steering system sourced from the new C-class, something which replaces the older hydraulic set-up of the SLS.
Leading the development team at the Nürburgring is Markus Hofbauer, who's credited with much of the chassis development carried out on the current 911. While Hofbauer and his team will be trying to get as much performance out of the GT as possible ahead of its on-sale date of 2015, the car is already said to lap the Nürburgring faster than the SLS.
The Mercedes-AMG GT is expected to go on sale later this year for around £100,000. It will be assembled on the same production line used for the SLS, at AMG's headquarters in Affalterbach, Germany.
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