Mercedes-Benz USA has added a new range-topping variant to the new GLE range, in the form of the GLE580 with EQ Boost technology.
Under the bonnet is a twin-turbo 4.0-litre V8 with 360kW and 700Nm, augmented by an integrated starter generator with 48V on-board electrics system that can assist with an extra 16kW and 250Nm over short bursts.
Mercedes-Benz doesn't quote performance figures, though we'd expect the 580 to be a few tenths of a second quicker to triple figures than the AMG 53 model – which completes the benchmark sprint in 5.3 seconds with its 320kW/520Nm turbocharged straight six mild-hybrid powertrain.
The GLE580 will serve as the new flagship variant in North America for the time being, at least until the AMG 63 arrives, and will be priced from US$76,800 ($111,690) when it goes on sale in late 2019.
Mercedes-Benz USA already offers GLE350 GLE350 4Matic and GLE450 4Matic variants of the new GLE, all of which are manufactured at the company's plant in Spartanburg, South Carolina.
The company's local arm has previously confirmed the Australian line-up will initially consist of the GLE300d, GLE400d and GLE450 when the new-gen range hits local showrooms during the second quarter of this year, with the AMG 53 version to lob before the end of the year.
Speaking with CarAdvice, Mercedes-Benz's local media relations and product communications manager, Ryan Lewis, said: "At this stage the local GLE line-up remains unchanged, including 300d, 400d and 450 variants. However, appetite for further petrol-powered vehicles is strong and you can expect exciting AMG variants to come".