Sakhir, Bahrain - Three-time Formula One world champion Jackie Stewart on Friday called on FIA president Max Mosley to quit in the wake of revelations that he was engaged in sex acts with prostitutes that involved Nazi role-playing.

"He is simply no longer tenable as the head of a world-wide organization," the Scot told the German Pay-TV station Premiere in Bahrain, where Sunday's Grand Prix will be held.

He pointed out that it was not only a question of sport, but also of business and added that had Mosley been the head of a big company or of the IOC or of football's governing body FIFA, he would no longer be holding his position.

Stewart, who won the world championship in 1969, 1971 and 1973 said that it was not only a FIA decision, but also one for Mosley himself.

Stewart said that Grand Prix races were held in different countries with different religions and cultures. "He should do the right thing for sport."

Mosley's invitation to come to Bahrain for the Grand Prix had earlier been withdrawn by Bahrain crown prince Sheikh Salman Bin Hamad Al-Khalifa.

The crown prince, who was due to have dinner with Mosley, told the FIA president in a letter that: "With great regret I feel that under the current circumstances, it would be inappropriate for you to be in Bahrain at this time."

A British tabloid reported Sunday that Mosley, son of British Union of Fascists founder Sir Oswald Mosley, engaged in sex acts with prostitutes that involved Nazi role-playing.

They reported that Mosley paid five prostitutes 2,500 pounds in cash and then engaged in an orgy that lasted almost five hours.

The 67-year-old is alleged to be seen on a video that shows him screaming orders in German and lashing girls wearing concentration camp uniforms.

The man on the video - allegedly Mosley - is also seen to be whipped by prostitutes before engaging in sexual acts. He then drinks a cup of tea with them.

Mosley, whose father had Adolf Hitler as guest of honour at his wedding, which was held in the Berlin home of Nazi propaganda chief Joseph Goebbels, has since called for a FIA Extraordinary General Assembly meeting.

The father of two has not denied that he is the man in the video, but denied that there had been a Nazi connotation to the matter.

"This is entirely false," he wrote in a letter to FIA.

Mosley has also been under pressure from other quarters, including BMW, Mercedes-Benz, Toyota and Honda, who called on FIA to address the issue.

On Thursday BMW and Mercedes-Benz issued a joint statement, calling the content in the article "disgraceful" and demanding a response from FIA.

"The content of the publications is disgraceful. As a company, we strongly distance ourselves from it," said the statement.

"This incident concerns Max Mosley both personally and as President of the FIA, the global umbrella organization for motoring clubs. Its consequences therefore extend far beyond the motor sport industry. We await a response from the relevant FIA bodies."

Mosley responded in a statement: "Given the history of BMW and Mercedes-Benz, particularly before and during the Second World War, I fully understand why they would wish to strongly distance themselves from what they rightly describe as the disgraceful content of these publications.

"Unfortunately they did not contact me before putting out their statement to ask whether the content was in fact true.

"No doubt the FIA will respond to them in due course, as I am about to respond to the newspaper in question."(dpa)