Mercedes says they had "unfinished business" at the Brazilian Grand Prix this weekend, even though Lewis Hamilton has already won his fifth world title.
The team is determined to double the drivers and constructors' championship for the fifth year in a row.
They will do so as long as Ferrari does not outdo them by more than 12 points on Sunday in Interlagos.
"We have a fight in hand and have lost ground in the last two races against Ferrari," said team boss Toto Wolff.
"Our goal for the season was to win both championships, not one or the other, so we're just unfinished in Sao Paulo."
Mercedes had to fight for the race performance in the last two Grand Prix races in the US and Mexico, which were won by Ferrari's Kimi Raikkonen and Max Verstappen of Red Bull.
Her central theme was the recurrence of tire problems that have affected her from time to time in recent seasons.
"We can not be satisfied with our race performance in Mexico," said Wolff.
"Qualifying looked promising, but after only a few laps in the race, we knew we had a lot of trouble with the tires.
"We started analyzing these issues immediately after the race and came to understand the challenges and why.
"It's important to apply all of our knowledge to make sure we're strong in Brazil."
Brazil is the penultimate race of the season, and Hamilton said he was determined to continue winning despite the title win.
In 2015 and 2017, Hamilton could not win another race after winning the championship before the end of the season.
Wolff praised Hamilton as "the best driver of his generation and the absolute greatest that this sport has ever seen".
He added, "I know that both Lewis and Valtteri [Bottas] are determined to end their respective seasons with a high grade; As a team, we want to finish this year with upscale minds and two achievements that truly reflect the level of performance achieved this year. "