"There is a hint of Red Bull about the rear bodywork treatment around the exhaust," said BBC F1 technical analyst Gary AndersonLotus were the first Formula 1 team to unveil their new 2013 car - the E21McLaren have launched the MP4-28 at their base in WokingMcLaren have followed Ferrari's 2012 lead in using pull-rod front suspension which creates a lower centre of gravityFerrari have launched their car for the 2013 season at their Maranello base - F138Ferrari team boss Stefano Domenicali insisted they must be competitive from the start of the seasonForce India launched the VJM06 at their Silverstone factory on the same day as Ferrari's F138Driver Paul di Resta then took it for a spin around a damp Silverstone circuitSauber's new C32 has a number of interesting design features and a new graphite grey liveryThe new Ferrari-powered Sauber was revealed at the team's Hinwil base in SwitzerlandThe car has a very pronounced 'stepped' nose and more purple in the colour of the bodyworkRed Bull's RB9 car was launched at the team's Milton Keynes base on 3 FebruaryMercedes drivers Lewis Hamilton and Nico Rosberg unveil the Mercedes for 2013 that team principal Ross Brawn described as "a clear step forward in design"BBC F1 technical analyst Gary Anderson said: "One area that is definitely working a bit harder are the front brake ducts, which are more elaborate"Toro Rosso were marooned in the standings last year - well ahead of the bottom three teams but unable to challenge the midfieldFrench racer Charles Pic (left) and Giedo van der Garde of the Netherlands reveal the latest Caterham - the CT03Caterham technical director Mark Smith said of the the CT03: "We have made a number of significant changes... This is the package we will take to race one in Australia. We will then bring new front and rear wings and a new diffuser soon after the start of the season"Jean Eric-Vergne and Daniel Ricciardo will again be driving the new Toro Rosso STR8, which they hope can carry them and the team further up the fieldNew British driver Max Chilton has also been putting the MR02 through its paces in testingMarussia launched the new MR02 during testing, driven here by new Brazilian ace Luiz RaziaWilliams were the last team to unveil their new car - the FW35. Pastor Maldonado (left), Valtteri Bottas and reserve driver Susie Wolff were present for the launchThe car was thrown straight into the thick of it, taking part in the second testing session at Barcelona's Circuit de Catalunya