Have a 2011 A4 P+. Love the car, but was disgusted to find out that bluetooth streaming audio isn't supported. To make matters worse, my car didn't come with an aux jack. I know Audi released the bluetooth usb adapter, but that only works for MMI 2G. After some research and late nights on the forms, I created my own solution that has been working flawlessly for the past month.
Here's what you'll need:
1. 3.5 mm dongle adapter that plugs into your glovebox. Audi doesn't sell this on their U.S. car accessory page and other than a small mention in the car manual, there's very little info out there that this cable even exists! I initially tried saving some cash and ordering one on eBay, but for whatever reason that cable didn't work. I finally bit the bullet and ordered directly through my dealer. Part #4F0-051-510-F. Cost: $75.00
2. Belkin Air Cast Car Bluetooth Adapter. This connects to the 3.5 mm dongle. It can stream calls and/or music via bluetooth. You can pick one up at any Apple store or Amazon. Cost: $70
3. Optional stereo cable extenders from radio shack. Cost: $5
Total Cost $150 or $34 less then the OEM Audi Bluetooth Adapter for MMI 2G systems.
Couple things worth mentioning....
I ran the cables from my glovebox underneath the siding of my center console to the storage space under the armrest. No cables show.
Most smartphones will allow you to select multiple bluetooth sources. My iPhone 4 does. I have the MMI Bluetooth selected for calls and the Air Cast Bluetooth adapter selected for music. Check to ensure your phone supports multiple sources.
With the 3.5 mm Bluetooth setup, volume is the only setting you can control. Pausing, skipping, selecting music must be done directly on the iPod.
All playback seems to work. I successfully streamed Pandora, Slacker and of course, my iPod library via bluetooth.
Music quality is a 4/5. For most people it will be enough, but some may take issue with the loss in fidelity. If fidelity is what you're biggest concern is, stick with the iPod cable that plugs directly into your iPod.
Let me know if you have any questions or anything to add!
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