Mercedes to race W01B car in Spain

Mercedes will reportedly launch a major upgrade for its 2010 car in the hope of pushing for grand prix wins.

It was reported early last week that if the W01 is not winning races by June, the Brackley based team will switch its focus to 2011.

"We have very good developments coming, and I cannot wait," said Nico Rosberg, whose teammate is the seven time world champion Michael Schumacher.

Germany’s Auto Motor und Sport on Tuesday gave details about the major upgrade, set for debut at Barcelona next month.

Changes as fundamental as a revised wheelbase are reportedly part of the package, which will require the ’B’ car to undergo all new FIA crash tests.

The report also said the weight distribution, rear suspension and the gearbox housing will be changed.

It is believed Mercedes would also like to slim the actual chassis instead of extending the wheelbase, but "the chassis is homologated. We cannot change it," team boss Ross Brawn is quoted as saying.

Schumacher added: "We will take a big step, but the others move forwards as well."