how can i fix my ford 6006e cd player?

how do i enter the 4 digit code into my cd car system model 6006e, its the one that takes 6 cds at one time..

tony
August 2009

Hi Bob, error code 4 is "focus error" ford manual says to fix problem:- CD is upside down or dirty!! clean CD and try again if error code still displayed try different CD if still displayed replace unit!!!
Try putting a CD lens cleaner into the radio (most good audio shops sell them. Maplins)

nigel
August 2009