You can imagine the other teams are not happy about this at all.
Monaco Grand Prix: Mercedes face protest over tyre testing
Mercedes are at the centre of a technical row in Formula 1 after doing a three-day tyre test between the Spanish and Monaco grands prix.
In-season testing in F1 is forbidden and Red Bull and Ferrari are considering a protest against Mercedes.
Sources say governing body the FIA knew about the test, with contracts outside the rules allowing it to happen.
But rival teams are angry because extra running on tyres could potentially give Mercedes a technical advantage.
Mercedes, whose two drivers Nico Rosberg and Lewis Hamilton will start from the front row for Sunday's Monaco Grand Prix, have been struggling with heavy tyre usage this season.
The tyres used at the test were development designs for next season, as well as a new tyre Pirelli wants to introduce at next month's Canadian Grand Prix.
Pirelli is aiming to introduce rear tyres that are less vulnerable to delamination following a series of failures.
But the plan is in dispute, with Ferrari, Lotus and Force India yet to approve it.
Mercedes are at the centre of a technical row in Formula 1 after doing a three-day tyre test between the Spanish and Monaco grands prix.
In-season testing in F1 is forbidden and Red Bull and Ferrari are considering a protest against Mercedes.
Sources say governing body the FIA knew about the test, with contracts outside the rules allowing it to happen.
But rival teams are angry because extra running on tyres could potentially give Mercedes a technical advantage.
Mercedes, whose two drivers Nico Rosberg and Lewis Hamilton will start from the front row for Sunday's Monaco Grand Prix, have been struggling with heavy tyre usage this season.
The tyres used at the test were development designs for next season, as well as a new tyre Pirelli wants to introduce at next month's Canadian Grand Prix.
Pirelli is aiming to introduce rear tyres that are less vulnerable to delamination following a series of failures.
But the plan is in dispute, with Ferrari, Lotus and Force India yet to approve it.
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