Red Bull fears that it will not be able to close the gap to Mercedes in 2015 and is worried its Formula 1 rival could be even further ahead next year. As efforts to relax F1's engine freeze appear to have failed, with Mercedes refusing to concede ground, Red Bull's...

Britain's The Independent reports that Mercedes increased its Formula 1 budget by 17 percent last year to a record £324.6 million [$517m].The report cites company documents for Mercedes' F1 engine manufacturing division as showing that in 2013 it spent £133.9m [$213m] to develop its new 1.6-liter turbo engines. That is...