Part No's from Audi Forum.US
PHONE INTERFACE BOX Full functionality unless shown otherwise
8E0 862 335 <MY 2005.5 A4 (North America) - no Bluetooth
8P0 862 335 <MY 2004 A3 - Basic functionality only
8P0 862 335 A MY 2004 A3/A4 - Basic functionality only
8P0 862 335 D MY 2005 A4 >8E-5-533 000 - Basic functionality only
8P0 862 335 E MY 2005 A4 8E-5-533 001>>8E-5-600 000 - Basic functionality only
8P0 862 335 C MY 2006 A4 8E-6-000 001/8E-6-800 001>>
8P0 862 335 B MY 2006 A3/A4 (North America)
8P0 862 335 F MY 2006.5 A3/A4 (Europe)
8P0 862 335 G MY 2006.5 A4 (North America)
8P0 862 335 M MY 2007 (Europe)
8P0 862 335 J MY 2007 (North America)
8P0 862 335 H MY 2007.5 (Europe)
8P0 862 335 L MY 2008 (North America)
8P0 862 335 K MY 2008 (Europe, sw 0340) -> may get replaced under warranty due to faulty firmware
8P0 862 335 Q MY 2008 (Europe, sw 0350)
8P0 862 335 R MY 2008 (North America)
8P0 862 335 N MY 2009 (Europe)
8P0 862 335 P MY 2009 (North America)
8P0 862 335 S MY 2009.5 (Europe)
8P0 862 335 T MY 2009.5 (North America)
8P0 862 335 AA MY 2010 (Europe)
8P0 862 335 AB MY 2010 (North America)
8P1 862 335 MY 2011 (Europe)
8L1 862 373A - Microphone
8J0 862 373 B - Microphone BOSE/TEL for TT 8J, R8 and 8P cabrio
8P0 035 503E - Bluetooth Antenna
8T0 862 336 A MY 2009 (Europe) for B8 A4, A5 & Q5 without MMI
8T0 862 336 B MY 2010 (Europe) for B8 A4, A5 & Q5 without MMI