Mercedes boss Toto Wolff has said the team are viewing the final two races of the 2017 season as the first two races of the 2018 campaign.
The Silver Arrows have secured both World titles for the fourth consecutive year and wasting no time in their preparation of their latest title defences.
"Inside the team, we are looking at the next two race weekends as the first two Grands Prix of 2018," Wolff said in his Brazilian Grand Prix preview.
"We have two races that we are determined to win in order to take that positive momentum into the winter.
"There will be no backing off just because the championship business is now done.
"In fact, these next two races speak to every principle that makes us what we are.
"We aspire to excellence in everything we do, from the first lap of the winter shakedown in Silverstone to the final lap of the post-season test in Abu Dhabi.
"And every time we race, we race to win. That is the mindset we take to Sao Paulo."
Wolff is also not discounting the threat of Ferrari, despite Mercedes and Red Bull winning the last four races between them.
He added:"As recent rounds have shown, winning Grands Prix is never easy.
"Red Bull have taken two victories in the past four races and, although we have claimed the other two, Ferrari remains formidable opponents.
"With the championship now settled, the battle for 2018 has already begun."
Experience the full coverage of the FIA Formula One season throughout 2017 on FOX Sports Play, where you can watch LIVE races from angles, unlike any other, highlights, interviews, behind the scenes and much more. Don’t miss it!