All,

I recently purchased a brand new A3 and despite searching the forum high and low, I have not been able to determine with certainty that my head unit (standard single CD, i think a Concert II) is compatible with an XM module. I currently have XM in another vehicle and would hate to move to Sirius. Thanks for your help.

It should be compatible with all of the stereos, unless they changed something since '07.

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Turbochargers whistle while they work, superchargers whine while they screw.

Should be fine. They both use the same type of RCA adapters so I don't see a problem and if there is Sirius is great. Other then you don't get the MLB package but you do get NFL.

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2006 A3 2.0T Sport DSG. Open sky, Sirius, AWE Vent Boost Gauge.