Vettel 'quite happy' with Barcelona test

World champion Sebastian Vettel says he is "quite happy" with the Barcelona test in which Red Bull unveiled a car with significant modifications as they look for a third consecutive constructors' title.

The 2010 and 2011 drivers' champion admits to showing caution at this stage of the season but describes the whole testing programme as "better than five but less than 10" out of 10.

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