I don't believe you can play MP3's on our audio system. I use a Vasitech ipod adaptor which, I find just fine.
Otherwise you can use your Regular CD's.
Full bluetooth dialing out, using car keypad, while driving, requires cutting the blue Vehicle speed sensing wire, mentioned in old threads. It is an excellent MOD.
Is the old thread in the rx400h forum? Didn't see it.
I will look into the Vasitech ipod adaptor. Thanks