Ok, so I bought my 2010 V6 lux last week with Trunk mounted CD Changer. I pdf'd the specs after I bought it. Anyway, when I went to upload cd's in it the drive was empty! So I emailed the salesman and he says it didn't come with a 6 cd changer and that I would have to get it installed by a dealer. Am i missing something? Is it just a port, and then you have to do additional work to it? I assumed they just forgot the cartridge. I guess two questions, one is this normal and two how much work is involved to get it working? Do I just buy a cartridge and I am off and running?