The BMW-Sauber F1 team is awaiting word from the FIA regarding next year's Championship after Toyota withdrew from the sport.
BMW Motorsport boss Mario Theissen is hoping Sauber's future is resolved by the end of the year.
BMW said their farewells to Formula One in Abu Dhabi on Sunday, ending their four-year stay at a fully fledged Constructor with a fifth-placed finish.
Sebastian Vettel won the season-ending Abu Dhabi GP ahead of his team-mate Mark Webber and the two Brawn GP drivers.
There were top ten places in the Abu Dhabi qualifying for Jarno Trulli, both BMW drivers, Nico Rosberg and Sebastien Buemi.
Bernie Ecclestone is hopeful of finding a resolution that will see Sauber on the grid for next season.
Neither Force India, BMW nor Renault managed to find their way into the top ten in Friday's Abu Dhabi practice.
Nick Heidfeld believes it is imperative Great Britain retains its grand prix as doubts continue to surround next year's race.
Team boss Mario Theissen is gearing up for a bitter-sweet weekend for BMW-Sauber as the team celebrates their 70th race and at the same time bids farewell to F1.
BMW bid farewell to Formula One at the season-ending Abu Dhabi GP and the team is hoping to end their F1 career on a high note.
Williams insist that they are not the only outfit who would not welcome the introduction of a fourteenth team next season.
Mark Webber claimed the victory in Sunday's Brazilian GP, beating Robert Kubica, Lewis Hamilton and Seb Vettel. But the day belonged to fifth-placed and new World Champion, Jenson Button.
Both Williams drivers, Robert Kubica and Fernando Alonso made it into the top ten in Brazil qualy while McLaren were the only team without a representative.
BMW team boss Mario Theissen hopes to convince Frank Williams, amongst others, to allow the BMW-Sauber F1 team's new owners to become the 14th team for next year's Championship.
While BMW didn't shine in Friday's Brazilian practice, Ferrari appeared to go backwards with Kimi Raikkonen only managing 18th place and Fisichella, last.