Michael Schumacher on Wednesday said he does not intend to return to Formula One for one year only.

It was announced earlier that, after a three-year 'retirement' following a 16-year Grand Prix career, the seven time world champion will be Nico Rosberg's teammate at Mercedes GP in 2010.

He then told international media during a teleconference - whose quality was compromised due to the sheer number of global participants - that the intention is for more than the one-year contract that has been signed.

"We are talking about a three year deal," said the 40-year-old German. "It is not a one-off thing. We are obviously looking for continuity."

Schumacher also admitted that, after the intended three years in the cockpit - which will take him close to his 45th birthday - he could slot into an ambassadorial role for the German marque.

"For sure there is also the possibility to work as ambassador for Mercedes," he is quoted as saying by German media. "That also makes sense."

However, Schumacher also expressed some compunction about ending his 14-year relationship with Ferrari, with whom he secured his last five world championships and three subsequent years as advisor.

"I had a special relationship with Ferrari and would not have come back for any old team," he said. "The factors of (former Ferrari technical director) Ross Brawn and Mercedes-Benz were really crucial."

Schumacher clarified that his contract does not afford him undisputed number one status.

"There were always these rumours that I always have a certain status. I can confirm that it was never the case. The team always decided the status, and that will be no different now," said the record-holding winner of 91 Grands Prix.