fuel requirements on 2007 Mercedes-Benz C280 4MATIC

why cant I use regular gas if there is no noticeable affect with performance in my c 280

Asked by for the 2007 Mercedes-Benz C280 4MATIC
many cars that advise using premium fuel will actually run quite well on regular or midgrade. there WILL be a trade off in lower performance. all gasoline is not the same, as
many brands no longer contain the detergents they once had.
read about this at and chose a fuel that
still contains the additives your MB needs.