F1 testing is now officially underway in Valencia and of the 13 teams participating, “seven are taking part today in Spain including the new Mercedes GP car [above].” Two teams, Force India and Red Bull, have opted out of this testing session and will participate in Jerez and Barcelona. Continue reading to see Michael Schumacher’s GP2 test, which took place on January 12th. Click here for first picture in gallery.

New teams Campos, Lotus, US F1 and Virgin Racing are all expected to test by the end of this month.

[via Autocar]