Sauber Formula One driver Adrian Sutil of Germany drives during the second free practice session of the Abu Dhabi F1 Grand Prix at the Yas Marina circuit in Abu Dhabi November 21, 2014. REUTERS/Hamad I Mohammed (UNITED ARAB EMIRATES - Tags: SPORT MOTORSPORT F1) 

Force India Formula One driver Sergio Perez of Mexico drives his damaged car into the pits after a collision with Sauber Formula One driver Adrian Sutil of Germany during the F1 United States Grand Prix at the Circuit of the Americas in Austin, Texas November 2, 2014. REUTERS/Darron Cummings/Pool (UNITED STATES - Tags: SPORT MOTORSPORT F1) 

Sauber Formula One driver Adrian Sutil of Germany drives during the third practice session of the U.S. Grand Prix at the Circuit of The Americas in Austin, Texas, November 1, 2014. The U.S. Grand Prix will take place on Sunday. REUTERS/Mike Stone (UNITED STATES - Tags: SPORT MOTORSPORT F1) 

Sauber Formula One driver Adrian Sutil of Germany drives during a free practice session of the United States F1 Grand Prix at the Circuit of The Americas in Austin, Texas October 31, 2014. The United States Grand Prix will take place on Sunday. REUTERS/Mike Stone (UNITED STATES - Tags: SPORT MOTORSPORT F1) 

Sauber Formula One driver Adrian Sutil of Germany prepares to take part in the second practice session of the F1 United States Grand Prix in Austin, Texas October 31, 2014. The United States Grand Prix will be held on Sunday. REUTERS/Adrees Latif (UNITED STATES - Tags: SPORT MOTORSPORT F1) 

Sauber Formula One driver Adrian Sutil of Germany drives during the second practice session of the Singapore F1 Grand Prix at the Marina Bay street circuit in Singapore September 19, 2014. REUTERS/Pablo Sanchez (SINGAPORE - Tags: SPORT MOTORSPORT F1) 

Toro Rosso Formula One driver Jean-Eric Vergne of France is followed by Caterham Formula One driver Marcus Ericsson of Sweden and Sauber Formula One driver Adrian Sutil of Germany during the second practice session of the Singapore F1 Grand Prix at the Marina Bay street circuit in Singapore September 19, 2014. REUTERS/Pablo Sanchez (SINGAPORE - Tags: SPORT MOTORSPORT F1) 

(Top L to R) Sauber Formula One driver Adrian Sutil of Germany, Lotus Formula One driver Pastor Maldonado of Venezuela, Caterham Formula One driver Marcus Ericsson of Sweden, (bottom L to R) Toro Rosso Formula One driver Jean-Eric Vergne of France, Ferrari Formula One driver Kimi Raikkonen of Finland and Force India Formula One driver Sergio Perez of Mexico take off their headsets as they leave a news conference ahead of the Singapore F1 Grand Prix at the Marina Bay street circuit in Singapore September 18, 2014. REUTERS/Xavier Galiana (SINGAPORE - Tags: SPORT MOTORSPORT F1) 

Sauber Formula One mechanics push the car of Adrian Sutil of Germany in the pit lane ahead of the Singapore F1 Grand Prix at the Marina Bay street circuit in Singapore September 18, 2014. REUTERS/Pablo Sanchez (SINGAPORE - Tags: SPORT MOTORSPORT F1) 

Sauber Formula One driver Adrian Sutil of Germany drives on the track in front of Mercedes Formula One drive Nico Rosberg of Germany during a practice session at the Belgian F1 Grand Prix in Spa-Francorchamps August 23, 2014. REUTERS/Laurent Dubrule (BELGIUM - Tags: SPORT MOTORSPORT F1) 

Sauber Ferrari Formula One driver Adrian Sutil of Germany drives during the first practice session at the Belgian F1 Grand Prix in Spa-Francorchamps August 22, 2014. REUTERS/Yves Herman (BELGIUM - Tags: SPORT MOTORSPORT F1) 

Sauber Formula One driver Adrian Sutil of Germany pilots his car during the qualifying session of the Hungarian Grand Prix at the Hungaroring circuit in Mogyorod, near Budapest July 26, 2014. REUTERS/David W Cerny (HUNGARY - Tags: SPORT MOTORSPORT F1) 

Sauber Formula One driver Adrian Sutil of Germany leaves the track after having technical problems with his car during the German F1 Grand Prix at the Hockenheim racing circuit, July 20, 2014. July 20, 2014. Nico Rosberg won his home German Grand Prix for Mercedes on Sunday and his team mate Lewis Hamilton finished third after starting in 20th place. Finland's Valtteri Bottas took second place for Williams. REUTERS/Ralph Orlowski (GERMANY - Tags: SPORT MOTORSPORT F1)

Sauber Formula One driver Adrian Sutil of Germany leaves the track after having technical problems with his car during the German F1 Grand Prix at the Hockenheim racing circuit, July 20, 2014. July 20, 2014. Nico Rosberg won his home German Grand Prix for Mercedes on Sunday and his team mate Lewis Hamilton finished third after starting in 20th place. Finland's Valtteri Bottas took second place for Williams. REUTERS/Ralph Orlowski (GERMANY - Tags: SPORT MOTORSPORT F1)

Sauber Formula One driver Adrian Sutil of Germany drives through a corner during the German F1 Grand Prix at the Hockenheim racing circuit July 20, 2014. REUTERS/Michael Dalder (GERMANY - Tags: SPORT MOTORSPORT F1)

Sauber Formula One driver Adrian Sutil of Germany gestures as he speaks to a crew member during the first practice session of the Bahrain F1 Grand Prix at the Bahrain International Circuit (BIC) in Sakhir, south of Manama April 4, 2014. REUTERS/Caren Firouz (BAHRAIN - Tags: SPORT MOTORSPORT F1)

Sauber Formula One driver Adrian Sutil of Germany takes a corner during the Malaysian F1 Grand Prix at Sepang International Circuit outside Kuala Lumpur, March 30, 2014. REUTERS/Samsul Said (MALAYSIA - Tags: SPORT MOTORSPORT F1)

Sauber Formula One driver Adrian Sutil of Germany drives during the qualifying session for the Malaysian F1 Grand Prix at Sepang International Circuit outside Kuala Lumpur, March 29, 2014. REUTERS/Samsul Said (MALAYSIA - Tags: SPORT MOTORSPORT F1)

Sauber Formula One driver Adrian Sutil of Germany takes a corner during the first practice session of the Malaysian F1 Grand Prix at Sepang International Circuit outside Kuala Lumpur, March 28, 2014. REUTERS/Samsul Said (MALAYSIA - Tags: SPORT MOTORSPORT F1)

Sauber Formula One driver Adrian Sutil of Germany (front) drives ahead of Toro Rosso Formula One driver Daniil Kvyat of Russia during the Australian F1 Grand Prix at the Albert Park circuit in Melbourne March 16, 2014. REUTERS/Brandon Malone (AUSTRALIA - Tags: SPORT MOTORSPORT F1)

Formula One drivers for the 2014 F1 season pose for a family photo before the start of the Australian F1 Grand Prix in Melbourne March 16, 2014. Pictured are (back row L-R) Marussia Formula One driver Max Chilton of Britain, Marussia Formula One driver Jules Bianchi of France, Caterham Formula One driver Kamui Kobayashi of Japan, Caterham Formula One driver Marcus Ericsson of Sweden, Toro Rosso Formula One driver Jean-Eric Vergne of France and Toro Rosso Formula One driver Daniil Kvyat of Russia; (middle row L-R) Williams Formula One driver Felipe Massa of Brazil, Williams Formula One driver Valtteri Bottas of Finland, Sauber Formula One driver Adrian Sutil of Germany, Sauber Formula One driver Esteban Gutierrez of Mexico, Force India Formula One driver Nico Hulkenberg of Germany, Force India Formula One driver Sergio Perez of Mexico, Lotus Formula One driver Romain Grosjean of France and Lotus Formula One driver Pastor Maldonado of Venezuela; (front row L-R) Mercedes Formula One driver Lewis Hamilton of Britain, Mercedes Formula One driver Nico Rosberg of Germany, Ferrari Formula One driver Fernando Alonso of Spain, Ferrari Formula One driver Kimi Raikkonen of Finland, Red Bull Formula One driver Sebastian Vettel of Germany, Red Bull Formula One driver Daniel Ricciardo of Australia, McLaren Formula One driver Jenson Button of Britain, McLaren Formula One driver Kevin Magnussen of Denmark. REUTERS/Jason Reed (AUSTRALIA - Tags: SPORT MOTORSPORT F1)

Sauber Formula One driver Adrian Sutil of Germany drives to gravel during the qualifying session for the Australian F1 Grand Prix at the Albert Park circuit in Melbourne March 15, 2014. REUTERS/Jason Reed (AUSTRALIA - Tags: SPORT MOTORSPORT F1)

Sauber Formula One driver Adrian Sutil of Germany drives during the third practice session of the Australian F1 Grand Prix at the Albert Park circuit in Melbourne March 15, 2014. REUTERS/Jason Reed (AUSTRALIA - Tags: SPORT MOTORSPORT F1)

Sauber Formula One driver Adrian Sutil of Germany takes a corner during the third practice session of the Australian F1 Grand Prix at the Albert Park circuit in Melbourne March 15, 2014. REUTERS/Jason Reed (AUSTRALIA - Tags: SPORT MOTORSPORT F1)

Sauber Formula One driver Adrian Sutil of Germany drives during the second practice session of the Australian F1 Grand Prix at the Albert Park circuit in Melbourne March 14, 2014. REUTERS/David Gray (AUSTRALIA - Tags: SPORT MOTORSPORT F1)

Sauber Formula One driver Adrian Sutil of Germany takes a corner during the second practice session of the Australian F1 Grand Prix at the Albert Park circuit in Melbourne March 14, 2014. REUTERS/Jason Reed (AUSTRALIA - Tags: SPORT MOTORSPORT F1)

Sauber Formula One driver Adrian Sutil of Germany poses during a photo session before the Australia Formula One Grand Prix, at Melbourne's Albert Park Track, March 13, 2014. The Australian F1 Grand Prix will be held on March 16. REUTERS/Brandon Malone (AUSTRALIA - Tags: SPORT MOTORSPORT F1 PROFILE) 

Formula One drivers for the 2014 season are pictured in this combo photo at Melbourne's Albert Park Track, March 13, 2014. Pictured are (top row, L-R) Red Bull Racing's Sebastian Vettel of Germany and Daniel Ricciardo of Australia, Mercedes Petronas' Lewis Hamilton of Britain and Nico Rosberg of Germany, Ferrari's Fernando Alonso of Spain and Kimi Raikkonen of Finland, Lotus' Romain Grosjean of France and Pastor Maldonado of Venezuela, McLaren Mercedes' Jenson Button of Britain and Kevin Magnussen of Denmark, Force India's Nico Hulkenberg of Germany, (bottom row, L-R) Force India's Sergio Perez of Mexico, Sauber's Adrian Sutil of Germany and Esteban Gutierrez of Mexico, Toro Rosso's Jean-Eric Vergne of France and Danil Kvyat of Russia, Williams' Felipe Massa of Brazil and Valtteri Bottas of Finland, Marussia's Jules Bianchi of France and Max Chilton of Britain and Caterham's Marcus Ericsson of Sweden and Kamui Kobayashi of Japan. REUTERS/Brandon Malone (AUSTRALIA - Tags: SPORT MOTORSPORT F1 TPX IMAGES OF THE DAY) 

Sauber F1 driver Adrian Sutil of Germany drives during the first day of Formula One testing at Bahrain International Circuit in Sakhir, south of Manama, February 19, 2014. REUTERS/Stringer (BAHRAIN - Tags: SPORT MOTORSPORT F1) 

Sauber Formula One driver Adrian Sutil of Germany drives his car during pre-season testing at the Jerez racetrack in southern Spain January 31, 2014. Formula One supremo Bernie Ecclestone has dismissed the sport's new V6 turbo era as "completely unnecessary nonsense" after Renault engine woes sidelined champions Red Bull in pre-season testing. REUTERS/Jon Nazca (SPAIN - Tags: SPORT MOTORSPORT) 

Formula One drivers pose for a group picture ahead of the Brazilian F1 Grand Prix at the Interlagos circuit in Sao Paulo November 24, 2013. From left to right, top to bottom: Marussia Formula One drivers Max Chilton of Britain and Jules Bianchi of France, Caterham Formula One drivers Giedo van der Garde of the Netherlands and Charles Pic of France, Toro Rosso Formula One drivers Daniel Ricciardo of Australia and Jean-Eric Vergne of France, Williams Formula One drivers Valtteri Bottas of Finland and Pastor Maldonaldo of Venezuela, Force India Formula One drivers Adrian Sutil of Germany and Paul di Resta of Britain, Sauber Formula One drivers Esteban Gutierrez of Mexico and Nico Hulkenberg of Germany, Lotus Formula One drivers Romain Grosjean of France and Heikki Kovalainen of Finland, Mercedes Formula One drivers Lewis Hamilton of Britain and Nico Rosberg of Germany, Ferrari Formula One drivers Felipe Massa of Brazil and Fernando Alonso of Spain, Red Bull Formula One drivers Sebastian Vettel of Germany and Mark Webber of Australia, and McLaren Formula One drivers Jenson Button of Britain and Sergio Perez of Mexico. REUTERS/Nacho Doce (BRAZIL - Tags: SPORT MOTORSPORT F1)

Force India Formula One driver Adrian Sutil of Germany (R) and Force India Formula One driver Paul di Resta of Britain drive during the third practice session of the U.S. F1 Grand Prix at the Circuit of the Americas in Austin, Texas November 16, 2013. REUTERS/Mike Stone (UNITED STATES - Tags: SPORT MOTORSPORT F1)

(Front L - R) Mercedes Formula one driver Lewis Hamilton of Britain, Red Bull Formula One driver Sebastian Vettel of Germany, Ferrari Formula One driver Fernando Alonso of Spain, (back L - R) Force India Formula One driver Adrian Sutil of Germany, Lotus Formula One driver Romain Grosjean of France and Williams Formula One driver Valtteri Bottas of Finland attend a news conference ahead of the Abu Dhabi F1 Grand Prix at the Yas Marina circuit in Abu Dhabi October 31, 2013. REUTERS/Ahmed Jadallah (UNITED ARAB EMIRATES - Tags: SPORT MOTORSPORT F1) 

Force India Formula One driver Adrian Sutil of Germany drives during the Indian F1 Grand Prix at the Buddh International Circuit in Greater Noida, on the outskirts of New Delhi, October 27, 2013. REUTERS/Adnan Abidi (INDIA - Tags: SPORT MOTORSPORT F1)

Force India Formula One driver Adrian Sutil of Germany drives during the third practice session of the Indian F1 Grand Prix at the Buddh International Circuit in Greater Noida, on the outskirts of New Delhi, October 26, 2013. REUTERS/Adnan Abidi (INDIA - Tags: SPORT MOTORSPORT F1)

Force India Formula One driver Adrian Sutil of Germany drives during the second practice session of the Indian F1 Grand Prix at the Buddh International Circuit in Greater Noida, on the outskirts of New Delhi, October 25, 2013. REUTERS/Adnan Abidi (INDIA - Tags: SPORT MOTORSPORT F1)

Force India Formula One driver Adrian Sutil (3rd L) of Germany walks on the track at the Buddh International Circuit in Greater Noida on the outskirts of New Delhi October 24, 2013. The Indian F1 Grand Prix will take place from October 25-27. REUTERS/Adnan Abidi (INDIA - Tags: SPORT MOTORSPORT F1) 

Force India Formula One driver Adrian Sutil of Germany drives during the third practice session of the Japanese F1 Grand Prix at the Suzuka circuit October 12, 2013. REUTERS/Toru Hanai (JAPAN - Tags: SPORT MOTORSPORT F1)

Force India Formula One driver Adrian Sutil (R) of Germany chats with a crew member as they walk the Marina Bay Street Circuit before the Singapore F1 Grand Prix, September 19, 2013. REUTERS/Tim Chong (SINGAPORE - Tags: SPORT MOTORSPORT F1) 

Drivers attend a news conference ahead of the Singapore F1 Grand Prix September 19, 2013. From first row, McLaren Formula One driver Sergio Perez of Mexico (L-R), Lotus F1 Formula One driver Kimi Raikkonen of Finland, Williams Formula One driver Valtteri Bottas of Finland (top L-R), Sauber Formula One driver Nico Hulkenberg of Germany and Force India Formula One driver Adrian Sutil of Germany. The Singapore F1 night race will take place on September 22, 2013. REUTERS/Edgar Su (SINGAPORE - Tags: SPORT MOTORSPORT) 

Drivers attend a news conference ahead of the Singapore F1 Grand Prix September 19, 2013. From first row, McLaren Formula One driver Sergio Perez of Mexico (L-R), Lotus F1 Formula One driver Kimi Raikkonen of Finland, Mercedes Formula One driver Nico Rosberg of Germany, Williams Formula One driver Valtteri Bottas of Finland (top L-R), Sauber Formula One driver Nico Hulkenberg of Germany and Force India Formula One driver Adrian Sutil of Germany.The Singapore F1 night race will take place on September 22, 2013. REUTERS/Edgar Su (SINGAPORE - Tags: SPORT MOTORSPORT) 

Drivers remove their microphones as they leave after a news conference ahead of the Singapore F1 Grand Prix September 19, 2013. From first row, McLaren Formula One driver Sergio Perez of Mexico (L-R)
, Lotus F1 Formula One driver Kimi Raikkonen of Finland, Mercedes Formula One driver Nico Rosberg of Germany, Williams Formula One driver Valtteri Bottas of Finland
(top L-R), Sauber Formula One driver Nico Hulkenberg of Germany and Force India Formula One driver Adrian Sutil of Germany.The Singapore F1 night race will take place on September 22, 2013. REUTERS/Edgar Su (SINGAPORE - Tags: SPORT MOTORSPORT) 

Sauber Formula One driver Nico Hulkenberg of Germany talks to compatriot Force India Formula One driver Adrian Sutil (R) before the drivers pre-race news conference ahead of the Singapore F1 Grand Prix September 19, 2013. REUTERS/Tim Chong (SINGAPORE - Tags: SPORT MOTORSPORT F1) 

Force India Formula One driver Adrian Sutil of Germany takes a curve during the first practice session of the Belgian F1 Grand Prix at the Circuit of Spa-Francorchamps August 23, 2013. REUTERS/Laurent Dubrule (BELGIUM - Tags: SPORT MOTORSPORT F1)

Force India Formula One driver Adrian Sutil of Germany drives during the first practice session of the Belgian F1 Grand Prix at the Circuit of Spa-Francorchamps August 23, 2013. REUTERS/Francois Lenoir (BELGIUM - Tags: SPORT MOTORSPORT F1)

Force India Formula One driver Adrian Sutil of Germany poses on the track ahead of the weekend's Belgian F1 Grand Prix in Spa-Francorchamps August 22, 2013. REUTERS/Laurent Dubrule (BELGIUM - Tags: SPORT MOTORSPORT F1) 

Toro Rosso Formula One driver Daniel Ricciardo of Australia drives ahead of Force India Formula One driver Adrian Sutil of Germany during the Hungarian F1 Grand Prix at the Hungaroring circuit in Mogyorod, near Budapest July 28, 2013. REUTERS/Laszlo Balogh (HUNGARY - Tags: SPORT MOTORSPORT F1)

Force India Formula One driver Adrian Sutil of Germany drives ahead of Ferrari Formula One driver Felipe Massa of Brazil during the Hungarian F1 Grand Prix at the Hungaroring circuit in Mogyorod, near Budapest July 28, 2013. REUTERS/Bernadett Szabo (HUNGARY - Tags: SPORT MOTORSPORT F1)

Force India Formula One driver Adrian Sutil of Germany drives during the third practice session of the Hungarian F1 Grand Prix at the Hungaroring circuit in Mogyorod, near Budapest July 27, 2013. REUTERS/Laszlo Balogh (HUNGARY - Tags: SPORT MOTORSPORT F1)

Force India Formula One driver Adrian Sutil of Germany drives during the second practice session of the Hungarian F1 Grand Prix at the Hungaroring circuit in Mogyorod, near Budapest July 26, 2013. REUTERS/Laszlo Balogh (HUNGARY - Tags: SPORT MOTORSPORT F1)

Force India Formula One driver Adrian Sutil of Germany drives during the qualifying session for the German F1 Grand Prix at the Nuerburgring circuit, July 6, 2013. REUTERS/Wolfgang Rattay (GERMANY - Tags: SPORT MOTORSPORT F1)

Force India Formula One driver Adrian Sutil of Germany drives during the qualifying session for the German F1 Grand Prix at the Nuerburgring circuit, July 6, 2013. REUTERS/Wolfgang Rattay (GERMANY - Tags: SPORT MOTORSPORT F1) 

Formula One drivers of Germany (L-R) three-time World Champion Sebastian Vettel of Red Bull, Nico Huelkenberg of Sauber, Adrian Sutil of Force India and Nico Rosberg of Mercedes pose for a group photo before the news conference ahead of the German F1 Grand Prix at the Nuerburgring July 4, 2013. The race will be held at the Nuerburgring racing circuit on Sunday. REUTERS/Wolfgang Rattay (GERMANY - Tags: SPORT MOTORSPORT F1) 

Ferrari Formula One driver Fernando Alonso (front) of Spain drives ahead of Force India Formula One driver Adrian Sutil of Germany during the Canadian F1 Grand Prix at the Circuit Gilles Villeneuve in Montreal June 9, 2013. REUTERS/Christinne Muschi (CANADA - Tags: SPORT MOTORSPORT F1)

Force India Formula One driver Adrian Sutil of Germany drives during the qualifying session of the Canadian F1 Grand Prix at the Circuit Gilles Villeneuve in Montreal June 8, 2013. REUTERS/Christinne Muschi (CANADA - Tags: SPORT MOTORSPORT F1)

Force India Formula One driver Adrian Sutil of Germany drives during the third practice session of the Canadian F1 Grand Prix at the Circuit Gilles Villeneuve in Montreal June 8, 2013. REUTERS/Christinne Muschi (CANADA - Tags: SPORT MOTORSPORT F1)

Force India Formula One driver Adrian Sutil of Germany drives during the second practice session of the Canadian F1 Grand Prix at the Circuit Gilles Villeneuve in Montreal June 7, 2013. REUTERS/Christinne Muschi (CANADA - Tags: SPORT MOTORSPORT F1)

Force India Formula One driver Adrian Sutil (R) of Germany poses for a photo with a fan during Open House Day ahead of the Canadian F1 Grand Prix at the Circuit Gilles Villeneuve in Montreal, June 6, 2013. The Canadian F1 Grand Prix will take place on June 9. REUTERS/Christinne Muschi (CANADA - Tags: SPORT MOTORSPORT F1) 

Force India Formula One driver Adrian Sutil of Germany steers his car during the qualifying session of the Monaco F1 Grand Prix May 25, 2013. REUTERS/Benoit Tessier (MONACO - Tags: SPORT MOTORSPORT F1)

Jennifer Becks, girlfriend of Force India Formula One driver Adrian Sutil of Germany, walks before the third practice session of the Monaco F1 Grand Prix May 25, 2013. REUTERS/Benoit Tessier (MONACO - Tags: SPORT MOTORSPORT F1 SOCIETY)