The International Frankfurt Motor Show IAA was held in Frankfurt, Germany, Tuesday, Sept. 12, 2017, which runs through Sept. 24, 2017. Wolfgang Porsche watches a VW presentation during the first media day of the show.

(AP Photo/Martin Meissner)

(AP Photo/Martin Meissner)

This photo shows the wheel of a Borgward.

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(AP Photo/Martin Meissner)

The International Frankfurt Motor Show IAA was held in Frankfurt, Germany, Tuesday, Sept. 12, 2017, which runs through Sept. 24, 2017. Wolfgang Porsche watches a VW presentation during the first media day of the show.

(AP Photo/Martin Meissner)

This photo shows the wheel of a Borgward.

(AP Photo/Martin Meissner)

A Kia stinger is surrounded by visitors during the first media day.

(AP Photo/Martin Meissner)

The new Kia Stonic is on display.

(AP Photo/Martin Meissner)

A woman holds the plug at the socket of a Kia Niro plug-in hybrid.

(AP Photo/Michael Probst)

A Mercedes-AMG Project One is surrounded by visitors.

(AP Photo/Michael Probst)

Two man work on the wheel of a Jaguar.

(AP Photo/Martin Meissner)

Borgward Isabella Concept car is on display.

(AP Photo/Martin Meissner)

(AP Photo/Martin Meissner)

(Arne Dedert/dpa via AP)

Ferrari vice president Enrico Galliera presents the new Ferrari Portofino at Ferrari's stand.

(AP Photo/Martin Meissner)

A Renault R.S. 2027 Vision Formula One concept car is on display.

(AP Photo/Martin Meissner)

(AP Photo/Martin Meissner)

(AP Photo/Martin Meissner)

A Citroen C4 Picasso is displayed.

(AP Photo/Martin Meissner)

A man looks into a Citroen Space Tourer Rip Curl camping vehicle.

(Uwe Anspach/dpa via AP)

Visitors stand next to a Smart 'Vision EQ' on the first press day.

(Andreas Arnold/dpa via AP)

A Rolls-Royce is being presented during the press presentation of the car manufacturer BMW.

(Uli Deck/dpa via AP)

Audi CEO Rupert Stadler presents an Audi Aicon show car during an event of German car maker Volkswagen on the eve of the opening of the International Frankfurt Motor Show.

(Uli Deck/dpa via AP)

The new Audi A8 and the Audi Aicon is being presented.

(AP Photo/Martin Meissner)

(AP Photo/Martin Meissner)

(AP Photo/Michael Probst)

A model sits in the back of a Mercedes van.

(Uli Deck/dpa via AP)

The Mercedes-Benz GLC F-Cell premieres during a press presentation.

(AP Photo/Martin Meissner)

Visitors look at a Lamborghini Aventador S Roadster.

(AP Photo/Martin Meissner)

Visitor use VR goggles to see a presentation of Seat at the Volkswagen stand.

(AP Photo/Martin Meissner)

(AP Photo/Martin Meissner)

(AP Photo/Michael Probst)

Ferrari cars are on display.

(Uwe Anspach/dpa via AP)

Formula One driver Lewis Hamilton arrives in a Mercedes-AMG Project One car during a press presentation at the Mercedes-Benz stand.

(Uwe Anspach/dpa via AP)

Daimler board member Ola Kallenius speaks during a press presentation at the Mercedes-Benz stand.

(Andreas Arnold/dpa via AP)

The new BMW i3 electric vehicle is presented.

(AP Photo/Martin Meissner)

Visitors look into a BMW i8 hybrid car.

(AP Photo/Martin Meissner)

Visitors inspect a BMW engine.

(Arne Dedert/dpa via AP)

A parcour runner in action in front of the new Opel Grandland X at the Opel stand.

(AP Photo/Martin Meissner)

(AP Photo/Martin Meissner)

A Kia stinger is surrounded by visitors during the first media day.

(AP Photo/Martin Meissner)

(AP Photo/Martin Meissner)

The new Kia Stonic is on display.

(AP Photo/Martin Meissner)

(AP Photo/Martin Meissner)

A woman holds the plug at the socket of a Kia Niro plug-in hybrid.

(AP Photo/Martin Meissner)

(AP Photo/Martin Meissner)

A Mercedes-AMG Project One is surrounded by visitors.

(AP Photo/Michael Probst)

(AP Photo/Michael Probst)

Two man work on the wheel of a Jaguar.

(AP Photo/Michael Probst)

(AP Photo/Michael Probst)

Borgward Isabella Concept car is on display.

(AP Photo/Martin Meissner)

(AP Photo/Martin Meissner)

(AP Photo/Martin Meissner)

(AP Photo/Martin Meissner)

Ferrari vice president Enrico Galliera presents the new Ferrari Portofino at Ferrari's stand.

(Arne Dedert/dpa via AP)

(Arne Dedert/dpa via AP)

A Renault R.S. 2027 Vision Formula One concept car is on display.

(AP Photo/Martin Meissner)

(AP Photo/Martin Meissner)

(AP Photo/Martin Meissner)

(AP Photo/Martin Meissner)

A Citroen C4 Picasso is displayed.

(AP Photo/Martin Meissner)

(AP Photo/Martin Meissner)

A man looks into a Citroen Space Tourer Rip Curl camping vehicle.

(AP Photo/Martin Meissner)

(AP Photo/Martin Meissner)

Visitors stand next to a Smart 'Vision EQ' on the first press day.

(Uwe Anspach/dpa via AP)

(Uwe Anspach/dpa via AP)

A Rolls-Royce is being presented during the press presentation of the car manufacturer BMW.

(Andreas Arnold/dpa via AP)

(Andreas Arnold/dpa via AP)

Audi CEO Rupert Stadler presents an Audi Aicon show car during an event of German car maker Volkswagen on the eve of the opening of the International Frankfurt Motor Show.

(Uli Deck/dpa via AP)

(Uli Deck/dpa via AP)

The new Audi A8 and the Audi Aicon is being presented.

(Uli Deck/dpa via AP)

(Uli Deck/dpa via AP)

(AP Photo/Martin Meissner)

(AP Photo/Martin Meissner)

A model sits in the back of a Mercedes van.

(AP Photo/Michael Probst)

(AP Photo/Michael Probst)

The Mercedes-Benz GLC F-Cell premieres during a press presentation.

(Uli Deck/dpa via AP)

(Uli Deck/dpa via AP)

Visitors look at a Lamborghini Aventador S Roadster.

(AP Photo/Martin Meissner)

(AP Photo/Martin Meissner)

Visitor use VR goggles to see a presentation of Seat at the Volkswagen stand.

(AP Photo/Martin Meissner)

(AP Photo/Martin Meissner)

(AP Photo/Martin Meissner)

(AP Photo/Martin Meissner)

Ferrari cars are on display.

(AP Photo/Michael Probst)

(AP Photo/Michael Probst)

Formula One driver Lewis Hamilton arrives in a Mercedes-AMG Project One car during a press presentation at the Mercedes-Benz stand.

(Uwe Anspach/dpa via AP)

(Uwe Anspach/dpa via AP)

Daimler board member Ola Kallenius speaks during a press presentation at the Mercedes-Benz stand.

(Uwe Anspach/dpa via AP)

(Uwe Anspach/dpa via AP)

The new BMW i3 electric vehicle is presented.

(Andreas Arnold/dpa via AP)

(Andreas Arnold/dpa via AP)

Visitors look into a BMW i8 hybrid car.

(AP Photo/Martin Meissner)

(AP Photo/Martin Meissner)

Visitors inspect a BMW engine.

(AP Photo/Martin Meissner)

(AP Photo/Martin Meissner)

A parcour runner in action in front of the new Opel Grandland X at the Opel stand.

(Arne Dedert/dpa via AP)

(Arne Dedert/dpa via AP)