Originally Posted by DUI Elite
Thanks for the synopsis!
I don't think I'll bother. Seems like a lot of work for a little bit of difference.
Last thing though, do I still have the upgraded amp in comparison?
The bluetooth certainly is convenient, but I'm not sure I'd pay the hundreds of dollars for the OEM USB - it's not terribly useful. It's convenient, but you're better off going third party with a Kufatec Fiscon (most expensive, most useful), Mobridge, or Parrot (least OEM, but still gets you BT, BT streaming stereo, and USB).
And unclear. The Professional HU is prerequisite for hifi, but I don't think means you have it automatically. There were periods when american cars came with hifi as the lowest option, but I'm not sure where your car falls.