A number of automotive news outlets spotted the 2017 BMW 5 Series on the road in what would be appear to be the vehicle’s final testing before it’s revealed. Autoevolution reports that could be as soon as the Paris Motor Show next month. Other reports have indicated that January’s Detroit Auto Show is a more likely target date.

Like its i3 and i8 models and 7 Series, BMW’s 5 Series makes use of carbon fiber reinforced polymer (CFRP) composites. Specifically, the 5 Series will take from the 7 Series “Carbon Core” technology and implement it in certain structural points of the vehicle to create an even lighter, even stronger chassis. It will be the first mass-produced mid-size sedan to feature carbon fiber construction in some portions of its body.

According to Carscoops, lightweight materials, including carbon fiber, are expected to help the new model shed at least 80 kg (176 lb) from the 2016 model, which should bring the sedan’s total weight to around 3,300 lbs. BMWBlog wrote that “lighter weight should do wonders for making the next-gen G30 BMW 5 Series handle, ride and perform better.”

The plug-in hybrid vehicle will be available in three versions. They will be called 530e, 540e and 550e – the last could be renamed M550e. The three will have a “zero emissions range” of 40 to 50 km and a maximum speed in electric mode capped at 120 km/h.  It will also offer three equipment lines: Sport, Luxury and M Sport. The wheels’ design will also be associated with the different equipment lines and offered in 18 and 19-inch variants.