The 2021 Mercedes-Benz S-Class dropped earlier today, with the first two models in the new lineup – the S500 and S580 – both sporting mild-hybrid powertrains with EQ Boost technology. But already Mercedes-Benz has revealed the third option in the new S-Class range: the plug-in hybrid.

Dubbed the S580e, the plug-in hybrid S-Class uses the same turbocharged 3.0-litre inline six-cylinder petrol engine from the base S500 model. But here it adds a gearbox-mounted electric motor and a 28-kilowatt-hour battery pack for a combined total output of 510 bhp (380 kilowatts). That's an improvement of 81 bhp (60 kW) over the S500 and 41 (31 kW) more than the standard S580.

Gallery: 2021 Mercedes-Benz S580e Plug-In

But of course, the S580e is all about electric range – and on the European WLTP test cycle, the plug-in S-Class can reportedly drive up to 62 miles (100 kilometres) on battery power alone. That's more than double the range of the previous S650e on the same WLTP scale. Considering the battery pack in the new S580e is more than twice the size of the one found in the outgoing S650e – 28.0 kWh versus 13.5 kWh – that newfound range is expected.

For now, the Mercedes-Benz S580e is for Europe only. But the plug-in S-Class will likely make its way to the US in the near future, our best guess is officially sometime next year. But when the S580e does make its way Stateside, don't expect the 62 miles of electric driving on the European model to carry over; on the EPA scale that range figure could drop by about 20 to 30 percent.

As mentioned, the base S500 gets a turbocharged inline-six engine good for 429 bhp (320 kW) and 384 pound-feet (521 Newton-metres), while the more powerful S580 model uses a twin-turbocharged V8 to produce 469 bhp (350 kW) and 516 lb-ft (700 nm).

The new Mercedes-Benz S-Class will be on sale in the UK in September and arrive at dealers in December. The S350d; S400d 4MATIC and S500 4MATIC will be available from launch.