Iwas tapping into the power source underneath the steering wheel to run a power wire for my compressor. Did that and when I was hooking it up my battery was still connected and I kept hearing the speakers make noise. Disconnected my battery and the controls didn't work anymore. Sent from my iPhone using Tapatalk. Joe. A4(B9 Platform) Discussion - MMI screen blank - Have had my Allroad less than 30 days & have 850 miles on it, with no issues at all. Left for grocery store this AM & MMI screen was blank. Information area in instrument cluster says, Initializing the Infotainment System, please wait . After about 10 min, it displays, Itsthe basic with dvd nav and Bluetooth. When I put the key in the ignition the mmi screen doesn't come on at all. I start the car and still nothing. The controls/buttons are not Ifthe MMI screen in Your Audi is not working, there could be several reasons that could cause it. To accurately diagnose the issue the first thing You should AudiParking Sensors not working - Easy fixSorry I said in video I bought this module from Amazon which is wrong. I bought it from www.ebay.comModule # 4L0 9 Ourcar is a 2014 Audi A8L 4.0T. We have an issue with our rear passenger window and common shade not functioning. It does not work from the driver's side controls or the passenger side rear controls. The passenger side control does function properly when operating the driver's side rear window/shade. I think i have checked all fuses Thisis a very common fault for the Audi A4, build range 2007-2014, where the entire instrument cluster fails. No backlight, gauge operation, LCD screen or warning/information light illumination can happen at any time, and worse still, it starts intermittently. Opting for a new replacement straight from manufacturer is very expensive, not only A4(B8 Platform) Discussion - Front tweeter speakers only working - I am having a problem with my 2010 audi a4 symphony speakers. One day all of the speakers went other than the left and right front tweeters. The front left door speaker would kick on and off every once in a while. Also the subwoofer would make noise dZYr.