BMW Sauber boss Mario Theissen is adamant there will be no lack of motivation this weekend despite the sadness certain to be felt at the team's final race.

After four seasons in Formula One, BMW bow out on Sunday come the conclusion of the sport's first day-to-night race around the Yas Marina circuit in Abu Dhabi.

The German manufacturing giants announced earlier this season they would be pulling out of F1 at the end of this year for financial reasons.

There is hope Sauber will be competing in 2010, although it would now appear they require another team to pull out for them to take up a place on the grid.

Assessing the weekend ahead, and his team's time in F1, Theissen said: "We travel to Abu Dhabi with mixed feelings.

"The eight points we collected in Brazil allowed us to move up a place in the constructors' championship, and we will be highly motivated again at the final race of the season.

"We are looking forward to racing at this new Formula One venue and can't wait to experience the atmosphere at the marina circuit.

"However, there will of course also be a fair amount of sadness within the team, after all this will be our 70th and final race.

"With the exception of our fourth and unfortunately final season, I'm more than satisfied with what we have achieved since 2006.

"In the first three years after the team was founded, we met - and even exceeded - all the aims we set ourselves.

"We recorded two podium finishes in our first season, and in our second we established ourselves as the third-strongest team in the championship.

"This was the year in which Robert (Kubica) suffered his horrific crash in Montreal, although a year later we enjoyed our greatest success.

"From the moment Robert and Nick (Heidfeld) crossed the finish line in quick succession to record a one-two result, there was no stopping us.

"We remained part of a three-way battle for the title almost until the end of the season. We notched up 11 podium finishes in total in 2008, and our reliability was excellent."

This year has been a disaster by comparison, one which has hastened their exit, although Kubica's second-place finish in Brazil 10 days ago at least erased some of the pain that has been felt.

"Of course, the whole team is disappointed we have been unable to build on our success in 2009 as we had hoped to have a say in the title race," added Theissen.

"But we have never thrown in the towel, even after BMW announced its withdrawal from Formula One, which shows the strong character of our team.

"I hope our successor will continue along this successful path in Formula One."