A worker looks at a Citroen C3 car in the final check area at the PSA Peugeot Citroen plant in Poissy, near Paris, April 29, 2015. PSA Peugeot Citroen said on Wednesday its revenue rose in the first quarter as the recovering French carmaker's efforts to raise prices helped offset weaker volumes. (Photo by Benoit Tessier/Reuters)

Peugeot 208 cars are parked at the PSA Peugeot Citroen plant in Poissy, near Paris, France, April 29, 2015. (Photo by Benoit Tessier/Reuters)

An employee works on the automobile assembly line of a DS 3 car at the PSA Peugeot Citroen plant in Poissy, near Paris, France, April 29, 2015. (Photo by Benoit Tessier/Reuters)

An employee works on an engine on the assembly line of the Peugeot 208, Citroen C3 and DS 3 cars at the PSA Peugeot Citroen plant in Poissy, near Paris, France, April 29, 2015. (Photo by Benoit Tessier/Reuters)

A Citroen C3 car is pictured in the final check area at the PSA Peugeot Citroen plant in Poissy, near Paris, France, April 29, 2015. (Photo by Benoit Tessier/Reuters)

A view shows the automobile assembly line as robots work on the construction of Peugeot 208, Citroen C3 and DS 3 cars at the PSA Peugeot Citroen plant in Poissy, near Paris, France, April 29, 2015. (Photo by Benoit Tessier/Reuters)

An employee works on the automobile assembly line of a Citroen C3 car at the PSA Peugeot Citroen plant in Poissy, near Paris, France, April 29, 2015. (Photo by Benoit Tessier/Reuters)

Robots work on the construction of a Peugeot 208 car at the PSA Peugeot Citroen plant in Poissy, near Paris, France, April 29, 2015. (Photo by Benoit Tessier/Reuters)

An employee works on the automobile assembly line of a a Citroen C3 car at the PSA Peugeot Citroen plant in Poissy, near Paris, France, April 29, 2015. (Photo by Benoit Tessier/Reuters)

An employee works on the automobile assembly line of a Citroen C3 car at the PSA Peugeot Citroen plant in Poissy, near Paris, France, April 29, 2015. (Photo by Benoit Tessier/Reuters)

An employee works on an engine on the automobile assembly line of the Peugeot 208, Citroen C3 and DS 3 cars at the PSA Peugeot Citroen plant in Poissy, near Paris, France, April 29, 2015. (Photo by Benoit Tessier/Reuters)

A DS 3 car is pictured in the final check area at the PSA Peugeot Citroen plant in Poissy, near Paris, France, April 29, 2015. (Photo by Benoit Tessier/Reuters)

Peugeot 208, Citroen C3 and DS 3 cars are parked at the PSA Peugeot Citroen plant in Poissy, near Paris, France, April 29, 2015. (Photo by Benoit Tessier/Reuters)

An employee works on the automobile assembly line of a Peugeot 208 car at the PSA Peugeot Citroen plant in Poissy, near Paris, France, April 29, 2015. (Photo by Benoit Tessier/Reuters)

An employee works on the automobile assembly line of a Peugeot 208 car at the PSA Peugeot Citroen plant in Poissy, near Paris, France, April 29, 2015. (Photo by Benoit Tessier/Reuters)

A view shows the automobile assembly line as robots work on the construction of Peugeot 208, Citroen C3 and DS 3 cars at the PSA Peugeot Citroen plant in Poissy, near Paris, France, April 29, 2015. (Photo by Benoit Tessier/Reuters)

An employee works on the automobile assembly line of a Citroen C3 car at the PSA Peugeot Citroen plant in Poissy, near Paris, France, April 29, 2015. (Photo by Benoit Tessier/Reuters)

A logo is pictured on a Peugeot 208 car parked at the PSA Peugeot Citroen plant in Poissy, near Paris, France, April 29, 2015. (Photo by Benoit Tessier/Reuters)

Pressed side pieces of Citroen C3 cars are pictured on the automobile assembly line at the PSA Peugeot Citroen plant in Poissy, near Paris, France, April 29, 2015. (Photo by Benoit Tessier/Reuters)