By Ilona Wissenbach
PARIS, Sept 28 (Reuters) - Volkswagen AG Chief Executive Matthias Mueller said Wednesday he is hopeful that the German automaker can reach agreement by the end of the year with the U.S. government on the size of a fine to settle an investigation of the company's alleged violations of U.S. clean air laws.
Mueller, speaking on the sidelines of the Paris auto show, said he also sees "good progress" toward an agreement with U.S. regulators that could allow Volkswagen to repair certain 3.0 liter diesel engines that emit more pollutants than U.S. law allows.
(Editing by Joseph White and Matthew Lewis)