My 1999 Audi A4 has the oem concert Bose stereo and a cd changer in the boot. i dont want to have to change the stereo as i like the flush look of the standard stereo so was wondering what is the cheapest way to get the oem stereo to read a usb stick full of mp3's???

this is the cheapest kit i can find online

http://cgi.ebay.co.uk/Connects2-USB-...item2c50c7d3de

but then i also came across these two and wondered if they would work just connected straight up to the stereo (the stereo is blaupunkt and the amp and speakers are bose) or am i just dreaming?!!

http://cgi.ebay.co.uk/ws/eBayISAPI.d...=STRK:MEWAX:IT

http://cgi.ebay.co.uk/2M-USB-2-0-to-...item2c52a8ce8b

my unit also has the volume control probem but they fetch £45 on ebay faulty so may just sell mine and get a fixed one....unless anyone know of someone on here who sells them??