None of the systems that just the AUX jack in the armrest will display anything on your nav or radio screen other than AUX.Does this actually show info on screen? I have an 06 IS350 non ML system.
I'd advise you to not listen to anything else your friend tells you, he has no idea what he's talking about.an AUX works pretty well, that's what i use. can't complain one bit, sounds crisp, and clear. didn't cost more then $20, only problem is, i dunno if it will mess up my sound system. a friend of mine told me the AUX will eventually mess up your system but not sure if it's true