Lewis Hamilton wants less drag and more power from the 2020 Mercedes Formula 1 car.
"We've got time for next year. I think it's not been a great year for us in terms of the great issue, in terms of our engine development," he said.
"I think it's been a really hard time for the guys, they've been working as hard as ever but it's just not been as successful in that department, as I say. In addition, it is quite draggy but we have had great reliability and hopefully, that remains the same and that is still something to be proud of, of course.
"We have, obviously, still won the constructors' championship but we'll push to try and maybe reduce the drag a little bit but also increase power for next year. So they're fully into it and I have all the confidence in the world that we'll be able to make some sort of step into the next season."