Near production prototype spotted testing before immanent reveal – here are the facts on Mercedes-AMG’s first hybrid

Mercedes-AMG is about to drop its latest rendition of a sports saloon, a production version of the imperious AMG GT Concept. Seen testing in another round of spy-shots, the car will be revealed at the upcoming Frankfurt motorshow powered by Affalterbach’s first hybrid powertrain.

Despite the nomenclature connection to the Mercedes-AMG GT, the GT 4-door will be based instead on a heavily modified version of the MRA platform that already underpins core Mercedes-Benz saloons. To justify the name though, Mercedes has significantly widened the GT 4-door compared to its more staid saloon cousins, integrating some of the design trademarks from the AMG GT including an upswept window line and fastback rear end.

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The long, low body will remain faithful to the concept, donning a Panamerica grill and trapezoidal headlights at the front, while at the rear, slim LED tail lights similar to those on the concept look unchanged

The bit that we are interested in though is what lies underneath the bonnet, as the hybridised ‘EQ Power+’ V8 powertrain we were promised in the concept will materialise in production form. Using the same ‘hot-vee’ 4.0-litre bi-turbo V8 as seen in other AMG models, Mercedes-AMG will supplement that with an electric motor raising total power up to around 595kW, if sources are correct. That makes even the insane Porsche Panamera Turbo S E-Hybrid’s 500kW seem limp by comparison.

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The powertrain will also function as a full series-hybrid system that should allow some level of EV mode depending on battery capacity. Rather than just retrofitting a current Mercedes-Benz battery pack, AMG will be producing a higher specification system that will be able to expel and regenerate electricity at a higher rate.

This hybrid system will be connected to a nine-speed automatic gearbox and 4MATIC all-wheel drive system, although it remains to be seen if it will mimic the latest E63 in offering a rear-drive drift mode. The latest mule spotted also sported a set of carbon-ceramic brakes with massive gold calipers.

The result of all of this tech should be some pretty mind blowing performance figures, with AMG aiming for a 0-62mph time of under three seconds while MPG and CO2 figures should both be far friendlier than the AMG norm. What AMG will call it is still up for speculation, with rumours of GT 4 or GT C4 floating around, as well as a possible historic moniker brought back from the past, considering it is AMG’s 50th birthday this year.

Regardless of the name, the GT 4-door may seem to some like a clumsy double up of the four-door coupe niche considering a new CLS is just around the corner, but it is more an exercise in the integration of hybrid technology in future of AMG. Complementing AMG’s upcoming ‘Project One’ F1 based hypercar, the GT will act as a halo product before the widespread adoption of this technology across the Mercedes-AMG range in the future.