Paddy Lowe reckons Mercedes W05 will be tested next weekend as the Silverstone circuit will put the "aerodynamic performance to the very limit."
Mercedes' W05 has been the car to beat throughout this year's Championship.
Nico Rosberg and Lewis Hamilton have claimed seven out of eight race victories of which six of those have been 1-2 results.
The team's latest triumph came at the last race in Austria where Rosberg and Hamilton beat the Williams' of Valtteri Bottas and Felipe Massa.
"It was a great result for the team to get another one-two finish in Austria - even more so considering our below-par grid positions," said Mercedes executive director Lowe.
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