Snowflakes are seen on the badge of a Ford car in Warsaw, Poland December 17, 2016. REUTERS/Kacper Pempel 

A modern classic Ford car is seen through the showroom window of a former petrol station, now used as a furniture and car sales room as well as vehicle repairs centre, near Telford, Britain, April 5, 2016. REUTERS/Toby Melville SEARCH "MELVILLE GAS" FOR THIS STORY. SEARCH "THE WIDER IMAGE" FOR ALL STORIES 

A Ford logo is pictured at a car dealership in Monterrey, Mexico, November 9, 2016. Picture taken November 9, 2016. REUTERS/Daniel Becerril 

A Ford logo is pictured at a car dealership in Monterrey, Mexico, November 9, 2016. Picture taken November 9, 2016. REUTERS/Daniel Becerril 

A Ford logo is pictured at a car dealership in Monterrey, Mexico, November 9, 2016. Picture taken November 9, 2016. REUTERS/Daniel Becerril 

A Ford logo is pictured on a wall of a car dealership in Monterrey, Mexico, November 9, 2016. Picture taken November 9, 2016. REUTERS/Daniel Becerril 

A Ford logo is pictured at a car dealership in Monterrey, Mexico, November 9, 2016. Picture taken November 9, 2016. REUTERS/Daniel Becerril 

A promotional sign adorns the side of the Ford Motor company's Broadmeadows Assembly Plant in the Melbourne suburb of Campbellfield, Australia, October 7, 2016. REUTERS/Sonali Paul

A Ford logo is pictured at a store of the automaker, in Mexico City, Mexico, April 5, 2016. Ford Motor Co reported a 113 percent surge in quarterly net income and records for global and North American operating margins, thanks to robust pricing of its F-150 pickup trucks in North America and improved profit in Europe. REUTERS/Edgard Garrido/File Photo 

A Ford logo is pictured at a store of the automaker, in Mexico City, Mexico, April 5, 2016. REUTERS/Edgard Garrido 

A bus passes in front of a Ford logo near a sales store of the automaker in Mexico City, Mexico, April 5, 2016. REUTERS/Edgard Garrido 

The logo of Ford is pictured near a sales store of the automaker in Mexico City, Mexico, April 5, 2016. REUTERS/Edgard Garrido 

A four-month-old North American cougar cub looks on inside its open-air enclosure in the Royev Ruchey zoo on the suburbs of the Siberian city of Krasnoyarsk, Russia, February 11, 2016. Cougars Ice and Arnaldo, who were both born at the zoo, gave birth to two cubs, according to employees. REUTERS/Ilya Naymushin 

A four-month-old North American cougar cub looks on inside its open-air enclosure in the Royev Ruchey zoo on the suburbs of the Siberian city of Krasnoyarsk, Russia, February 11, 2016. Cougars Ice and Arnaldo, who were both born at the zoo, gave birth to two cubs, according to employees. REUTERS/Ilya Naymushin 

A four-month-old North American cougar cub looks out from its den in the Royev Ruchey zoo on the suburbs of the Siberian city of Krasnoyarsk, Russia, February 11, 2016. Ice and another cougar Arnaldo, who were both born at the zoo, gave birth to two cubs, according to employees. REUTERS/Ilya Naymushin 

Two four-month-old North American cougar cubs play in the Royev Ruchey zoo on the suburbs of the Siberian city of Krasnoyarsk, Russia, February 11, 2016. Ice and another cougar Arnaldo, who were both born at the zoo, gave birth to two cubs, according to employees. REUTERS/Ilya Naymushin 

Two four-month-old North American cougars play in the Royev Ruchey zoo on the suburbs of the Siberian city of Krasnoyarsk, Russia, February 11, 2016. Ice and another cougar Arnaldo, who were both born at the zoo, gave birth to two cubs, according to employees. REUTERS/Ilya Naymushin TPX IMAGES OF THE DAY

Ice (L), a three-year-old female North American cougar, and its four-month-old cub leave their den in the Royev Ruchey zoo on the suburbs of the Siberian city of Krasnoyarsk, Russia, February 11, 2016. Ice and another cougar Arnaldo, who were both born at the zoo, gave birth to two cubs, according to employees. REUTERS/Ilya Naymushin 

A Ford Focus RS is displayed at the North American International Auto Show in Detroit, January 12, 2016. REUTERS/Gary Cameron 

A 2016 Ford GT is displayed at the North American International Auto Show in Detroit, January 12, 2016. REUTERS/Gary Cameron 

A 2016 Ford GT is displayed at the North American International Auto Show in Detroit, January 12, 2016. REUTERS/Gary Cameron 

Ford Motor Co CEO Mark Fields holds up a new Velodyne LIDAR sensor at the Ford press conference at the Consumer Electronics Show in Las Vegas, January 5, 2016. Ford said it will begin using a new, lower cost LiDAR sensor made by California-based Velodyne. The high cost of such sensors, which act as the eyes of a self-driving car, is one of the main technical obstacles to widespread commercialization of self-driving vehicles, industry executives say. REUTERS/Rick Wilking 

Ford Motor Co CEO Mark Fields holds up a new Velodyne LIDAR sensor at the Ford press conference at the Consumer Electronics Show in Las Vegas, January 5, 2016. Ford said it will begin using a new, lower cost LiDAR sensor made by California-based Velodyne. The high cost of such sensors, which act as the eyes of a self-driving car, is one of the main technical obstacles to widespread commercialization of self-driving vehicles, industry executives say. REUTERS/Rick Wilking 

Ford Motor Co CEO Mark Fields speaks at the Ford press conference at the Consumer Electronics Show in Las Vegas, January 5, 2016. Ford said it is exploring ways to link in-home automation devices such as Amazon.com Inc's Echo to the Sync communications systems in its cars to allow consumers to control lights or thermostats inside the home from the car, or start up cars and check fuel levels from inside the house. REUTERS/Rick Wilking 

Ford Motor Co CEO Mark Fields gives a television interview before the Ford press conference at the Consumer Electronics Show in Las Vegas, January 5, 2016. Ford said Tuesday it plans to triple to 30 the size of its fleet of self-driving test cars as part of an effort to accelerate autonomous vehicle development. REUTERS/Rick Wilking 

Ford Motor Co CEO Mark Fields laughs during a television interview before the Ford press conference at the Consumer Electronics Show in Las Vegas, January 5, 2016. Ford said Tuesday it plans to triple to 30 the size of its fleet of self-driving test cars as part of an effort to accelerate autonomous vehicle development. REUTERS/Rick Wilking 

Ford Motor Co CEO Mark Fields gives a television interview before the Ford press conference at the Consumer Electronics Show in Las Vegas, January 5, 2016. Ford said Tuesday it plans to triple to 30 the size of its fleet of self-driving test cars as part of an effort to accelerate autonomous vehicle development. REUTERS/Rick Wilking 

Ford Motor Co CEO Mark Fields speaks at the Ford press conference at the Consumer Electronics Show in Las Vegas, January 5, 2016. Ford said Tuesday it plans to triple to 30 the size of its fleet of self-driving test cars as part of an effort to accelerate autonomous vehicle development. REUTERS/Rick Wilking 

Ford Motor Co CEO Mark Fields speaks at the Ford press conference at the Consumer Electronics Show in Las Vegas, January 5, 2016. Ford said Tuesday it plans to triple to 30 the size of its fleet of self-driving test cars as part of an effort to accelerate autonomous vehicle development. REUTERS/Rick Wilking 

Head of Ford Germany Bernhard Mattes (R) gestures as German Chancellor Angela Merkel makes an opening tour of the Frankfurt Motor Show (IAA) in Frankfurt, Germany September 17, 2015. REUTERS/Ralph Orlowski 

Head of Ford Germany Bernhard Mattes (R) gestures as German Chancellor Angela Merkel makes an opening tour of the Frankfurt Motor Show (IAA) in Frankfurt, Germany September 17, 2015. REUTERS/Ralph Orlowski 

German Prime Minister of Hesse Volker Bouffier (L) and Chief of Ford Germany Bernhard Mattes (R) stand next to a Ford GT as German Chancellor Angela Merkel makes an opening tour of the Frankfurt Motor Show (IAA) in Frankfurt, Germany September 17, 2015.y September 17, 2015. REUTERS/Ralph Orlowski 

A man walks past a Ford Kuga car during the media day at the Frankfurt Motor Show (IAA) in Frankfurt, Germany September 16, 2015. REUTERS/Ralph Orlowski 

Visitors walk along a Ford Kuga car during the media day at the Frankfurt Motor Show (IAA) in Frankfurt, Germany September 16, 2015. REUTERS/Ralph Orlowski 

A visitor checks out a Ford Fiesta at the Indonesia International Motor Show in Jakarta, Indonesia August 21, 2015. REUTERS/Darren Whiteside

An assembly worker works on 2015 Ford Mustang vehicles on the production line at the Ford Motor Flat Rock Assembly Plant in Flat Rock, Michigan, August 20, 2015. REUTERS/Rebecca Cook 

A 2015 Ford Mustang vehicle moves down the production line at the Ford Motor Flat Rock Assembly Plant in Flat Rock, Michigan, August 20, 2015. REUTERS/Rebecca Cook 

A 2015 Ford Mustang vehicle moves down the production line at the Ford Motor Flat Rock Assembly Plant in Flat Rock, Michigan, August 20, 2015. REUTERS/Rebecca Cook 

A 2015 Shelby GT350R Mustang vehicle sits on the final production line at the Ford Motor Flat Rock Assembly Plant in Flat Rock, Michigan, August 20, 2015. REUTERS/Rebecca Cook 

Assembly workers pose with Ford Motor Executive Chairman Bill Ford (blue tie on left of vehicle) during a celebration of production of the 2015 Shelby GT350R Mustang vehicle at the Ford Motor Flat Rock Assembly Plant in Flat Rock, Michigan, August 20, 2015. REUTERS/Rebecca Cook 

Assembly workers take a photo with Ford Motor Executive Chairman Bill Ford (C) during a celebration of production of the 2015 Shelby GT350R Mustang vehicles at the Ford Motor Flat Rock Assembly Plant in Flat Rock, Michigan, August 20, 2015. REUTERS/Rebecca Cook 

Assembly workers work on the underside of 2015 Ford Mustang vehicles on the production line at the Ford Motor Flat Rock Assembly Plant in Flat Rock, Michigan, August 20, 2015. REUTERS/Rebecca Cook 

An assembly worker drives a 2015 Ford Mustang vehicle off the production line at the Ford Motor Flat Rock Assembly Plant in Flat Rock, Michigan, August 20, 2015. REUTERS/Rebecca Cook 

Ford Motor Executive Chairman Bill Ford poses with assembly workers during a celebration of production of the Shelby GT350R Mustang vehicle at the Ford Motor Flat Rock Assembly Plant in Flat Rock, Michigan, August 20, 2015. REUTERS/Rebecca Cook 

Ford Motor Executive Chairman Bill Ford addresses assembly workers during a celebration of production of the Shelby GT350R Mustang vehicle at the Ford Motor Flat Rock Assembly Plant in Flat Rock, Michigan, August 20, 2015. REUTERS/Rebecca Cook 

A Ford Motor assembly worker works on a 2015 Ford Mustang vehicle at the Ford Motor Flat Rock Assembly Plant in Flat Rock, Michigan, August 20, 2015. REUTERS/Rebecca Cook 

A Ford Motor assembly worker works on the frame of a 2015 Ford Mustang vehicle at the Ford Motor Flat Rock Assembly Plant in Flat Rock, Michigan, August 20, 2015. REUTERS/Rebecca Cook 

The frame of a 2015 Ford Mustang vehicle moves down the production line at the Ford Motor Flat Rock Assembly Plant in Flat Rock, Michigan, August 20, 2015. REUTERS/Rebecca Cook 

A Ford Motor assembly worker works on the frame of a 2015 Ford Mustang vehicle at the Ford Motor Flat Rock Assembly Plant in Flat Rock, Michigan, August 20, 2015. REUTERS/Rebecca Cook 

The frame of a 2015 Ford Mustang vehicle moves down the production line at the Ford Motor Flat Rock Assembly Plant in Flat Rock, Michigan, August 20, 2015. REUTERS/Rebecca Cook 

Ford Motor Executive Chairman Bill Ford gets in the driver's side of a 2015 Shelby GT350R Mustang to drive it off the production line during a celebration at the Ford Motor Flat Rock Assembly Plant in Flat Rock, Michigan, August 20, 2015. REUTERS/Rebecca Cook 

Ford Motor Executive Chairman Bill Ford drives a 2015 Shelby GT350R Mustang off the production line during a celebration at the Ford Motor Flat Rock Assembly Plant in Flat Rock, Michigan, August 20, 2015. REUTERS/Rebecca Cook 

Drivers of a 1915 Ford Model T (L-R) Paul Inaurio, Mark Gessler and Casey Maxon react after arriving from Detroit at the Palace of Fine Arts in San Francisco, California August 19, 2015. Their 3,500 mile, 34-day road trip recreated the cross country journey made by Edsel Ford 100 years ago, when he arrived at the Palace of Fine Arts for the 1915 World's Fair. REUTERS/Robert Galbraith 

The logo and floorboard of a 1915 Ford Model T are seen after it arrived from Detroit at the Palace of Fine Arts in San Francisco, California August 19, 2015. The 3,500 mile, 34-day road trip recreated the cross country journey made by Edsel Ford 100 years ago, when he arrived at the Palace of Fine Arts for the 1915 World's Fair. REUTERS/Robert Galbraith 

The license of a 1915 Ford Model T is seen after it arrived from Detroit at the Palace of Fine Arts in San Francisco, California August 19, 2015. The 3,500 mile, 34-day road trip recreated the cross country journey made by Edsel Ford 100 years ago, when he arrived at the Palace of Fine Arts for the 1915 World's Fair. REUTERS/Robert Galbraith 

The logo and hood ornament of a 1915 Ford Model T is seen after it arrived from Detroit at the Palace of Fine Arts in San Francisco, California August 19, 2015. The 3,500 mile, 34-day road trip recreated the cross country journey made by Edsel Ford 100 years ago, when he arrived at the Palace of Fine Arts for the 1915 World's Fair. REUTERS/Robert Galbraith 

A 1915 Ford Model T drives past the Palace of Fine Arts after arriving from Detroit in San Francisco, California August 19, 2015. The 3,500 mile, 34-day road trip recreated the cross country journey made by Edsel Ford 100 years ago, when he arrived at the Palace of Fine Arts for the 1915 World's Fair. REUTERS/Robert Galbraith 

Tourists look at a 1915 Ford Model T after it arrived from Detroit at the Palace of Fine Arts in San Francisco, California August 19, 2015. The 3,500 mile, 34-day road trip recreated the cross country journey made by Edsel Ford 100 years ago, when he arrived at the Palace of Fine Arts for the 1915 World's Fair. REUTERS/Robert Galbraith 

A 1915 Ford Model T drives the streets of the Marina District after arriving from Detroit at the Palace of Fine Arts in San Francisco, California August 19, 2015. The 3,500 mile, 34-day road trip recreated the cross country journey made by Edsel Ford 100 years ago, when he arrived at the Palace of Fine Arts for the 1915 World's Fair. REUTERS/Robert Galbraith 

A 1915 Ford Model T drives the streets of the Marina District after arriving from Detroit at the Palace of Fine Arts in San Francisco, California August 19, 2015. The 3,500 mile, 34-day road trip recreated the cross country journey made by Edsel Ford 100 years ago, when he arrived at the Palace of Fine Arts for the 1915 World's Fair. REUTERS/Robert Galbraith