Despite Mercedes' advantage this season, Toto Wolff has warned of a potential fight-back from rivals at the upcoming Spanish Grand Prix.
Mercedes have been the team to beat at the start of this year's Championship.
Taking all four pole positions and race victories, Nico Rosberg and Lewis Hamilton hold the 1-2 in the standings, both already a full race victory ahead of third-placed Fernando Alonso.
Added to that, Mercedes have 154 points in the Constructors' while second-placed Red Bull are on just 57.
But despite his team's massive advantage, Wolff is wary that a fight-back could be around the corner.
The Spanish GP, the first European race on the calendar, is known for being the venue...
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