UPDATE 3-Motor racing-Renault echo Ferrari's pullout threat

* Renault threaten F1 pullout at end of season

* Say 2010 rules must be changed

* Teams to meet Mosley in London on Friday

* Toyota say teams must have stability

(adds Toyota comment paras 15-18)

By Alan Baldwin

LONDON, May 13 (Reuters) - Former champions Renault followed Ferrari's lead on Wednesday and threatened to quit Formula One at the end of the season unless the governing body rewrites the 2010 rules.

"If the decisions announced by the (FIA) World Council on the 29th of April 2009 are not revised, we have no choice but to withdraw from the FIA Formula One world championship at the end of 2009," team boss Flavio Briatore said in a statement.