Lost "AUX setting"

[mw1967]

Hi all,Had a megane privilage 1.9dci for 9 months now and its been fine,11000 miles and no problems at all,that was untill i fitted a new battery and now for some strange reason i've lost the aux setting on my radio.its the carminat radio with multi changer and combined sat nav.i've an iphone lead that i brought on Ebay which fits in the back of the unit and it was great worked a treat,but like i say for some reason the aux setting in the radio where you go through the menus for fm/mw/cd and also aux has gone !.Can anyone help ?,

Many Thanks
Mark