Just bought an IS220d and realised it's only got Bluetooth for calls, not for playing music (Mark Levinson Sound System). Searching around, it seems a lot of people struggle to find a Bluetooth adapter that fits nicely and stays hidden.
Bluetooth Adapter
I've found this Bluetooth adapter which I'd never seen before, the actual Bluetooth part is inside the USB itself. also a perfect fit and tucks away in the centre console. Amazon link:
https://www.amazon.co.uk/dp/B0BTT48C61?psc=1&ref=ppx_yo2ov_dt_b_product_details
Shallow 12v Charger
Also grabbed a shallow 12v charger that fits without taking space. Have a look here:
https://www.amazon.co.uk/dp/B07PGT7LSR?psc=1&ref=ppx_yo2ov_dt_b_product_details
sound quality is great, no fake bass added like I've seen some of those FM ones do, connects instantly as soon as you turn the car on and goes straight to Aux on the screen, all volume controls still work. and steering wheel
Both fit inside the centre console, completely out of sight, and the console lid closes without hitting anything same with the sliding armrest. Plus, there's an extra USB port free for charging your phone or whatever else you need.
hope that helps someone