Berger: Mercedes must deliver in F1

Gerhard Berger thinks it is time that Mercedes GP starts delivering on its promises in Formula 1 - after failing to win a race since its takeover of the Brawn outfit at the start of 2010.

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Source: http://www.iracing.com/inracingnews/formula-one-news/f1-formula-one-news/berger-mercedes-must-deliver-in-f1/