Just replaced my amp for the Bose System.. Had to obviously disconnect battery...After an hours worth of work I reconnected battery...Here's the problem now...My MMI screen will not flip up, no sound from radio etc...even power windows dont "auto" up or down either....ANY SUGGESTIONS PLEASE !!! I've been all over the forums and i cant find anything...Even put old amp back just to check...but still nothing....Thank you !!!

 

Your radio/MMI may have gone into "Safe" mode and will need to be unlocked. There should be a part of the Owners Manual Documentation that covers this. The power window "auto" up and down is also another setting that you will have to set since battery power was lost. It is covered the power window section in the Owners Manual.