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One lap of the web: World's Fair, Porsche livery and monster trucks

Petrolicious is traveling back in time for the 1939 World's Fair in New York City. Check out some of the signage from the event and more than 20 minutes of vintage video. The Flat Sixes Porschephile website is comparing the 10 best Porsche liveries.

Fiat makes bid to buy Opel

The proposed partnership between Fiat and Chrysler has been thrown into a tailspin with revelations that the Italian carmaker has made a secret offer to purchase a majority stake in Opel. Klaus Franz, chairman of Opel's works council, on Thursday confirmed Fiat's interest in a takeover of General Motors' European subsidiary, suggesting that officials have cleared the way for the signing of a letter of intent as early as April 28. Opel has been in talks with parts supplier Magna International on a possible partnership over the past month.

Mercedes ESF 2009 Concept

The Mercedes ESF 2009 Concept showcases a raft of new safety technology So Mercedes has unveiled the Mercedes ESF 2009 Concept, which is a test-bed to showcase the latest technology Mercedes sees as on its way to mainstream. Mercedes has based the ESF Concept on the latest addition to the Mercedes S-Class Range – the S400 Hybrid – and has packed it to the rafters with airbags. There’s one that pops up between front seat passengers; airbags actually in the seatbelts and one great big airbag under the car that inflates if a crash is imminent.