Mercedes already understands the issue that in Canada ended the dominant team's run of one-two victories.
In Montreal, championship leader Nico Rosberg fell to second behind F1's newest winner Daniel Ricciardo, while the sister W05 of Lewis Hamilton failed to finish.
Reports this week said the technical problems with both cars began almost simultaneously, when the energy recovery systems overheated.
"We were trying a new cooling system for the first time. It seems the new software went crazy," team boss Toto Wolff told Bild newspaper earlier this week.
On Thursday, at the German team's Brackley (UK) factory, he indicated that Mercedes engineers now understand what went wrong....
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