By Drew Johnson
Friday, Jul 5th, 2013 @ 1:42 pm

Mercedes-Benz will unveil a plug-in variant of its all-new 2014 S-Class flagship at this September's Frankfurt Motor Show, a new report finds.

Speaking with Australia's Car Sales, David McCarthy, Senior Manager Corporate Communications at Mercedes-Benz Australia, revealed the automaker's plans to debut the plug-in variant of the new S-Class at the upcoming Frankfurt show. Mercedes introduced its latest S-Class with conventional powertrains earlier this year.

The plug-in will be marketed as the S500 Plug-In HYBRID in world markets, but it's possible Mercedes could opt to sell the car as the S550 Plug-In in the United States. That naming scheme would mirror the one used for the gas-powered S550, which is sold as the S500 in other markets.

Although Mercedes hasn't yet detailed the car's powertrain, the S500 Plug-In is expected to use a gasoline V6 engine paired with an electric motor backed by a lithium-ion battery pack. The S500 Plug-In should provide an all-electric range of about 20 miles.

Mercedes has already confirmed that the S500 Plug-In HYBRID will spew fewer than 75 grams of CO2 per kilometer, which roughly translates to 72mpg.

Following its Frankfurt debut, the S500 Plug-In HYBRID is scheduled to go on sale during the third quarter of 2014.

Photo by Drew Johnson.

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