2015 Audi A4 Bluetooth
 

I test drove a 2015 A4 today and I'm wondering how I might be able to play music from my phone using bluetooth and have the songs show on the the car's display as well as control it with the steering wheel. The car has the lower MMI verison Audi Concert which comes with the controls on the dash instead of near the gear shifter. I looked in the glove box and there was no AMI, and the center console only has an aux port. How would I go about doing that with this car?

Do you have a media button on your controls? When the phone is connected via bluetooth for the handsfree (I assume it has that), press media and see if the phone is an available source.
If not, you might look into retrofitting AMI, assuming AMI is a possible function for Concert equipped cars.

I am planning to install Aux retrofit in my A4 b8 model, and found the one as per your requirement,

https://www.kufatec.de/shop/en/ami-a...-retrofit-audi