How to fix S5 bluetooth since 5.0 update.

A

AC Question

Before the 5.0 update, I had my Samsung S5 paired with my Pioneer car stereo. I was able to do the following:
- Use my stereo remote to switch between tracks
- See my contact list and use the phone through the stereo "hands free"
- See track information. Song title, Album, Artist Name, etc. etc.
- Use the Voice Command on my headset to make/end calls.

After the 5.0 update I can only pair the phone, manually call with the phone (the sound comes through the stereo and the in-car microphone works, and play one track at a time with no remote functions or contact lists.

is there a way to fix this or at least roll-back the 5.0 so I can use the previous version OS?