Mercedes have once again dominated Formula One this year but their rivals are closing the gap.

Both Ferrari and Red Bull have enjoyed success since rules changes were made last winter to make cars faster and wider.

Mercedes are on course to win the Constructors’ Championship with their W08 car this year, while Lewis Hamilton could claim the Drivers’ Championship at the US Grand Prix on Sunday.

But technical problems, which Toto Wolff has previously described as “gremlins” in the car, have dogged the team all year.

And technical boss James Allison says Mercedes aim to correct those issues for the 2018 campaign.