With the opening of the Frankfurt Motor Show, the flood gates have opened and the car manufacturers are leaking images of some of their future offerings. This has provided us with the first details of the upcoming Mercedes-Benz Vision S 500 plug-in hybrid.

Even though details are not yet clear, the Vision S 500 plug-in hybrid is said to come with a V6 engine combined with a 60 horsepower electric motor. The configuration of the motor would probably be similar to the S 400 Hybrid the only difference being is the S 500 plug-in will use a larger lithium-ion battery pack.

Thanks to the larger battery, the S 500 plug in hybrid is reported to do 18.6 miles on pure electric power. Combined with the gasoline engine the the S 500 plug-in is expected to return better than 73 mpg.

Even with its green packaging, the S500 also packs a lot of performance, being able to run 60mph in just 5.5 seconds.