Another Bluetooth Retrofit question I'm afraid.... I am planning to buy this bluetooth retrofit kit from Kufatec; http://www.kufatec.de/shop/product_info.php/info/p401_Bluetooth-Kit-Retofit-Audi-A4-8E--only-bluetooth-.html and fit this in my 2007 A4 SLine SE. After reading the numerous posts here and on Navplus.us I think I have a clear idea how to do this but I there is one grey area which I hope someone can shed some light on :- If I fit this kit do I need to buy / do anything else to get the Voice Control to work (SDS)? I have a multifunction steering wheel. With hindsight I wish I had the Bluetooth as a factory option instead of the CD changer which I won't use as the SD card MP3 makes this somewhat redundant! Thanks in advance.