PAC RP4.2-BM21 Radio Replacement with Built-in Pre-Programmed Steering Wheel Control Retention Incompatible with vehicles equipped with the upper display screen (above radio) (CCC or CIC systems). This screen is not retained if the radio is removed, and the owner will lose the ability to adjust some vehicle settings. Does not retain amplifiers equipped with a Fiber-Optic input 1 Series equipped with navigation is not compatible 2006 3 Series coupe is not compatible