Apr.1 (GMM) Former triple world champion Sir Jackie Stewart insists the sex scandal involving Max Mosley should give the FIA president pause to consider his future.

The pair have a troubled history; Mosley recently branding Stewart a "halfwit" following criticism of the FIA's 'Stepneygate' handling, and the 68-year-old Scot hitting back with threats of legal action.

Now a representative for Williams sponsor RBS, Stewart - when arriving in Bahrain for the grand prix - was asked by the local newspaper Gulf Daily News for comment about the scandal that has some questioning Mosley's future in his post.

"Frankly I don't think it is for me to comment, I would rather hear what he has to say," Stewart said.

"I just think he has to look very carefully at it and address his future," he added.

F1 driver turned British commentator Martin Brundle, meanwhile, is the subject of a writ for libel after accusing Mosley of waging a McLaren "witch hunt" last year.

He commented of Mosley's secretly-taped escapade with five prostitutes: "It's not appropriate behaviour for the head of any global body."

1979 world champion Jody Scheckter, who has Jewish roots, said the so-reported 'Nazi sex scandal' is "absolutely" grounds for Mosley's resignation as FIA boss.

"You can't have somebody like this running the sport, or any other sport come to that.

"I really think he ought to go and I would like to see the press having a concerted campaign to persuade him to do just that," the South African is quoted as saying by the Guardian newspaper.