Translate the following English sentence to French:
"I would like to begin by thanking the rapporteurs Mr von Wogau, Mr Langen, Mr Rapkay and Mr Jonckheer, as well as the Commission, for their excellent cooperation."
Avant tout, je voudrais me féliciter de l'excellente collaboration des rapporteurs, MM. Von Wogau, Langen, Rapkay et Jonckheer, et de la Commission.