Agree with Sewin.
From Amazon, for £10.99, bought a “Zoachii bluetooth wireless auxiliary adapter” with 3.5 jack to plug into the aux socket of the radio and usb at the other end of the cable to power up the bluetooth. It works a treat. We use google maps on the phone for navigation and so get the verbal instructions through the car’s speakers. Music of choice comes by courtesy of Spotify. The best bit of course is that volume is easily controlled by your phone volume controls.
I went down a similar path. My 4/4 came with a basic radio and in over 10 years I've only used it a few times while waiting in car parks. I do use my phone for navigation and I've noticed that the lack of volume sometimes makes it hard to hear directions in a moving open car. I'm used to Apple CarPlay in our other cars, especially the ability to use voice commands to change the nav settings and to send and receive text messages.
The gadget I found on eBay is a "J54 Bluetooth Audio Receiver", this has a small control unit with a call/hang up/voice command button, volume buttons and << and >> which let you switch tracks or move back and forth in the podcast player. There are a few similar models, I liked this one as it has a long cable that divides to go to USB power and AUX into the radio. I've fixed the controller, which is about the size of a largish watch, to the metal dash with velcro. It lets me hear directions better and I can change nav settings, answer call etc. without touching the phone. The latter bit is most important.
