Adding bluetooth to an existing car stereo

[Dennismanson]

Hi Guy's,

Greetings from Spain! hope everyone is doing well?
Name is Dennis 33 years old and have a small small background in electrical engineering (when I was 20 years old I did 1 year at the university of applied science.) Happy to be here!

So here is the explanation, I would like to add a bluetooth board module to my existing car stereo and I made a digital wiring.
Could someone tell me if I did this right or totally wrong

ISO info I also got from The Audi ur-Quattro, DIN & ISO Radio Connectors - http://212.113.105.12/library/BOOKS/CAR/AUDI/SCHEMATIC/Kerbside/DIN$20$26$20ISO$20Radio$20Connectors.htm

Thanks so much for your time !

 

[Edtwozeronine]

Personally I'd just put in a new head unit with bluetooth built into it, but nothing ventured nothing gained, if you believe all your connections are correct give it a go.