Most Bluetooth streaming audio is not of super high quality (if this is important to you). There is a lot of audio compressions used. There is a new Bluetooth audio streaming profile called AptX which is nice, but only the latest gadgets support it and maybe not cars yet. However, you can buy a few Bluetooth 4 adapters with the APTX capability to plug in the audio input jack (and work with the latest phones), while providing at least one advantage to offset the extra wire.
Note : You type what you write. (If you use a keyboard for a laptop to type). This indicates that the writing speed