An “official measured and notarised certified” time of 6min 43.616sec for the lap without the T13 straight and 6min 48.047sec for the complete lap places the recently launched supercar at the top of the street-legal 'sports car' category.
That first time - offered up because records set before 2019 were set without the 232-metre straight addition added as part of the new ‘official’ lap - beats the previous record holder, the V12-powered Lamborghini Aventador SVJ, by just over 1.3sec.
The new record was set by Mercedes-AMG GT3 racing driver Maro Engel.
No modifications have been made to the GT Black Series beyond those that can be made to it as a production model. For example, the adjustable front splitter was extended to the Race position, the spoiler blades were set to the middle position and the adjustable coilover suspension was lower by 5mm at the front and 3mm at the rear.
The camber was also adjusted to the “maximum possible values”, while the anti-roll bars were in their hardest setting.
Mercedes claims the GT Black Series’ nine-stage traction control system was adjusted between positions six and seven depending on where Engel was on the lap. The factory Track package was fitted with rollover protection, while the standard Michelin Pilot Sport Cup 2 R MO tyres were fitted.
Engel described the GT Black Series as “significantly faster” than his GT3 car. The lap time was set on the same day as Mercedes-AMG's recent ‘executive class’ record set by the GT 63 S 4-Door Coupé, meaning track temperatures were low and some parts of the track were described as “not yet totally dry”.
The GT Black Series uses a flat-plane-crank 4.0-litre twin-turbocharged V8 engine to put 720bhp through the rear-wheels only. Although far from the most powerful car to have lapped the 'Ring, its aerodynamics and chassis dynamics are claimed to be the key to unlocking the fastest lap yet.