I'm a little confused with my car over the options it has and am trying to understand what is a definitive build spec. When I bought the car, I enquired with Audi over the spec. and they gave me the full list: A4 Black Edition Plus TDI quattro 177ps S-tronic Tech. Package Audi Music Interface DVD Player MMI Nav Plus Radio System for MMI plus Voice dialogue system Heated front seats Phone prep - High with connect Yes, it has ALL these things. But last night I took a photo of the build sticker in the boot tyre well and it doesn't appear to list a lot of them. When I use the online decoder it makes no mention of the phone prep. It doesn't mention the heated front seats, it lists the nav as "7T6 = Navigation system (MID)" which, I don't think, is MMI+ and it doesn't mention AMI. The VIN matches up throughout, and Audi used it ok for looking up the spec. but it isn't recognized by oemepc.com either. Oh and when I tried to order a Lightning cable for the AMI, 2 Audi dealers pointed me at the wrong one based on my registration (MMI compatible, not MMI+). Eventually I took a chance and bought the MMI+ version and it works perfectly (including album art). That makes me think their look-up for the vehicle is incorrect also. So all-in-all, a little confusing - is it normal for these labels to be incorrect?