appologies if this has been covered but couldn't find it. Just got an iPod & would like to hook it up to my car stereo, a sony CDX-ca700. The unit has aux in, but think it needs something like this to enable it. Long term that might be best but wondered if anyone knew how to enable aux in without as I'm having trouble finding out it that unit will work or in fact anything about it other than price, and don't really want to go & spend more cash just yet. This post deals with a similar problem but the solution doesn't work on my head unit.