BMW-Sauber's motorsport director Mario Theissen attributed this to the busy schedule that Vettel undertook as his team's test driver in the last three Grands Prix of the 2006 F1 season.
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2006 saw the Euro Series make its debut at three venues: Brands Hatch in the UK, the Circuit de Catalunya near Barcelona in Spain, and Le Mans.
2006 | Formula One | ATP International Series | World Series | 2006 in music | World Series of Poker | ATP International Series Gold | Star Trek: The Original Series | ATP World Tour 250 series | Euro | Buffy the Vampire Slayer (TV series) | 2006 FIFA World Cup | the season | series | ATP World Tour 250 Series | Gossip Girl (TV series) | Casualty (TV series) | 2006 Commonwealth Games | House (TV series) | The Twilight Zone (1959 TV series) | One Tree Hill (TV series) | limited series | Lost (TV series) | NCIS (TV series) | 2006 Central American and Caribbean Games | Swimming at the 2006 Central American and Caribbean Games | 90210 (TV series) | The Outer Limits (1963 TV series) | Sprint Cup Series | Monk (TV series) |