MONTREAL, Canada -- Mercedes has delayed the introduction of its latest engine upgrade by one race after facing "quality issues" ahead of this weekend's Canadian Grand Prix.
Montreal is the seventh of 21 rounds this season and the circuit's long straights and its power-sensitive nature means it is often a target for engine upgrades.
Renault and Honda have confirmed updates to their engines for this weekend and Mercedes had planned to bring the next step in its development to Montreal. However, on arrival in Canada, the team confirmed the upgrade would be delayed until the French Grand Prix in two weeks' time.