Mohammed,
Has this car had much of a dealer history, there were a lot of sofware up dates and a recall on a certain type of injection computer for this and other faults. Might be worth calling the dealer with the ECU sofware part no. and asking if they can check if it is up to date. Unfotunatly there were one or two of these cars with the D4f engine and this complaint that we could never cure for more than a month even with Renault UK support.
Good luck, Richard.
(Ex-Renault Technical Expert)