Hi all, I’m having some problems with an rcd310. The head unit that I bought came with a cd changer but I’m looking to run an aux lead. I don’t seem to have the option in the setup menu for aux input and was wondering if it was a variant code issue because of the cd changer. The code I pulled from my head unit is 0400020002 does anyone happen to have one they could check with a working aux lead. Thanks in advance.