Vettel will pilot the Williams BMW FW27 during the test session .
Germany 's young prodigy 18 year old , Sebastian Vettel drives during his Formula One debut at a private test session at the Jerez racetrack in Jerez , 27 September 2005 .
Sebastian Vettel will pilot the Williams BMW FW27 during the test session .
Germany 's young prodigy 18 year old , Sebastian Vettel drives during his Formula One debut at a private test session at the Jerez racetrack in Jerez , 27 September 2005 .