She's very similar to the Tesla Model S Plaid, at same Cd, which with 100-kWh, is EPA Combined 348-mile range, @ average 287.3 Wh/mile.
With aero wheels, and narrower wheels/tires, the Plaid ought to easily match Mercedes' EQS, and pick up a smidgeon more range.
Hucho foreshadowed all these sedan-coupe fastbacks 35-years ago.
Today, with electrification and range issues, designers know where the efficiency 'secret-sauce' lies.
Acura, Alpine, Aston-Martin, Audi, Bentley, BMW, Cadillac, Chevrolet, Daihatsu, Ford, GAC, Honda, Hyundai, Jaguar, KIA, Lightyear, Lucid, Mazda, McLaren, M-B, Mercury, Mitsubishi, Nissan, Peugeot, Pininfarina, Polestar, Porsche, Renault, Rolls-Royce, SEAT, Stellantis, Tata, Tesla, Toyota, Volkswagen, Volvo, and the rest, all know how the aerodynamic cow eats the aerodynamic cabbage.
The tyranny of unity is staring right down the barrel of their styling department's, and corporate economic viability.
One out of one atmosphere knows!
You can fool most of the people most of the time, but you can't fool any of the air any of the time.