This may be completley obvious to some but I thought it worth mentioning ! I have the rcd310 with the aux in as std and was always very disappointed at the volume level, if you turned both ipod and stereo up high it was ok but if you then went back to radio without first turning the stereo down then it nearly blew your ears off ! Well fiddling about as you do
I found an 'aux in level' on the menu with optios 1,2 and 3. I put in on 3 and presto brilliant, volume on aux ipod now matches radio - 