Sakhir, Bahrain  - Beleaguered FIA president Max Mosley, who is facing increasing pressure to step down after a video of him engaging in sex acts with five prostitutes was made public, insists that he has done no wrong.

Mosley late Friday wrote a letter to the German automobile federation ADAC, that had earlier called on him to consider his position. In it, he repeated an earlier statement that he would be suing the newspaper that published the story and posted the video on its website.

The letter, parts of which were published on autosport. com, has been sent to all members of FIA, as well as members of the World Council for Automobile Mobility and Tourism.

He said that he would have resigned immediately had he been caught speeding or driving over the alcohol limit.

"As it is, a scandal paper obtained by illegal means pictures of something I did in private which, although unacceptable to some people, was harmless and completely legal."

British tabloid News of the World reported last weekend that Mosley was engaged in sex acts with prostitutes that involved Nazi role-playing.

Mosley, the son of British Union of Fascists founder Sir Oswald Mosley, has not disputed that he is the man seen in a video but denied a Nazi connotation.

"It goes without saying that the so-called Nazi element is pure fabrication. This will become crystal clear when the matter comes to trial. The newspaper invented this in order to spice up their story and introduce my family background," he wrote in the letter to the ADAC.

"In short, I think I have done nothing wrong and that the wrong was done by the newspaper. That is why I am suing them."

Also on Friday, the world's largest auto club, the American Automobile Association (AAA), joined calls for Mosley to resign.

"AAA recognizes that Mr Mosley has dedicated many years of his life to advancing the interests of mobility and motorsport. However, after careful consideration, AAA has conveyed to Mr Mosley that it would be in the best interest of all concerned if he were to step down," AAA public relations managing director Yolanda Clark was quoted as saying by news reports.

Clark named the damage done by the revelations about Mosley "clearly public."

She said that the FIA and its leader "must uphold the highest standards of ethical behavior................. to exercise the moral authority required to represent millions of motorists."

The AAA, the world's largest automobile body with more than 50 million members, joined auto clubs from other nations such as Germany and the Netherlands in the call for Mosley to quit.

Mosley, meanwhile, has called an extraordinary general meeting of the FIA membership to deal with the issue.

The meeting can, however, only be held in six weeks as time-frames have to be followed. It is likely that Mosley will come under increasing pressure in the time leading up to the meeting.

Apart from the automobile clubs, former racing drivers such as three-time world champion Jackie Steward and South African world champion Jody Scheckter have called for Mosley to resign.

Car makers including BMW, Mercedes, Honda and Toyota have sharply criticized the 67-year-old. Mosley's invitation to come to Bahrain for the current Formula One Grand Prix was also withdrawn by Bahrain crown prince Sheikh Salman Bin Hamad Al-Khalifa. (dpa)