Wondering if anyone has experienced this. Ive had my P85D since last Nov and as of last week the AC unit has started developing a low freq buzzing noise which comes on and off seemingly dependent on the temperature setting. Was wondering if anyone has encountered similar or service centre has addressed it. Which leads me to my second annoyance. I placed a call to technical support. Obvious cannot deal with it and said they will book me in to look it. The earliest available booking, Mid August! Also suggested I should book my annual inspection now for a Nov service. Sorry, as car ownership experience goes, this is ridiculous.