Factory Becker CD Player BT Adapter with Controls?

Did not work
blue and green
6112 Cascade
430 Scuderia
No
First one, that says "Bluetooth Car Kit"

I purchased this one from Amazon https://www.amazon.com/gp/product/B07D9JW6S1/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1

 

Thanks to this topic I bought the BT model only and plug it into my 456 MGT Becker. It works perfectly. on the amazon kit the remote was not sold. Is it really useful? What are the functions?

a down side. If I am listening to the radio and receive a phone call, I need to manually switch the Becker to M (previous CD mode) to then take the call on my cell.