Just weeks before he steps down as head of the FIA, Max Mosley has stepped up his campaign against the presidential candidate Ari Vatanen.
Briton Mosley, 69, believes former Ferrari boss Jean Todt should succeed him, and in a new letter accuses Finn Vatanen of making "insults" and predicts the former world rally champion will "lose badly" the forthcoming democratic election.
He was responding to former European parliamentarian Vatanen's assertion that F1's governing body is presently being run as an "autocracy".
"It is not possible to make statements like Vatanen's and then expect the victims of those insults to forget what has been said," Mosley wrote in the letter addressed to Prince Faisal, a member of Jordan's royal family who is an advisor to Vatanen's campaign.
"The simple fact is that Vatanen will lose the election and lose badly, not least because he chose to denigrate the FIA and those currently in office," Mosley added in the letter which was published by the Guardian newspaper.
Faisal, expressing "grave concerns" at the letter's "insinuations", reportedly revealed the letter at a meeting of motor sport governing bodies in Amman, the Jordan capital.