Ferrari president Luca di Montezemolo has called for Max Mosley to quit as chief of motor racing's world governing body over his involvement in a sex scandal.

"I think that he should realize that sometimes it is necessary to say to yourself I have to leave for reasons of credibility," Montezemolo told the ANSA news agency.

Mosley was given a strong vote of confidence to remain as president on Tuesday, gaining 103 votes to 55 against in a secret ballot at an extraordinary meeting of the International Automobile Federation (FIA) general assembly in Paris.