In June, as Schumacher remained in intensive care, one of the great German's personal sponsors - the bottled water brand Rosbacher - said it would end its advertising deal with the former Ferrari and Mercedes driver.

Daimler chairman Dieter Zetsche, however, said Mercedes-Benz is not looking to terminate its contract with brand ambassador Schumacher despite the seven time world champion's continuing recovery in a Swiss rehabilitation hospital.

"We are pleased with the positive development," Zetsche, referring to the reported improvement in Schumacher's condition, told Bild am Sonntag newspaper.

"We hope fervently that it continues," he added.

When asked about Mercedes' commitment to Schumacher despite his injuries, Zetsche answered: "We have given no thoughts to changing something in the contract."

He said he had not visited Schumacher in hospital or rehabilitation since the skiing accident due to his "highest respect" for the family's privacy.