Just 17 cars are expected to feature in qualifying for the US Grand Prix with Sebastian Vettel likely to sit out the session while cash-strapped Marussia and Caterham squads have not travelled to America. Vettel has used his allocation of five power units for the season with the Red Bull driver requiring an engine change ahead of this weekend’s grand prix. The penalty for an entire engine change outside of the permitted allocation is to start the race from the pit-lane. As a result, Vettel has suggested he would not risk putting any unnecessary mileage on a new engine in qualifying when he will be forced to start the 17th round of the season from the pit-lane. With Marussia the latest...
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