HB,
You can check the radiator by looking underneath the front of the car at the plate under the oil cooler —if there is a small “hexhead” bolt about 35mm in from the side edge then this is likely the bolt that holds the “bobbin” which is the modification. No bolt ,no modification!!
I have looked into the Kenwood box further - the model Kac -1804 which the factory says is behind the rear speakers has no fader facility,however the model KAC -1824 bt has both a fader facility and a remote control which incorporates a Bluetooth input. I suspect that the solution may be the substitution of this model for the factory one which then will bypass the Musicstream unit. I need to speak to someone who actually knows about these things rather than me who is just a google user!!! Also, I need to find out how to access the Kenwood unit in the car - hopefully the factory will revert to my dealer.
I’ll let you know re the rest on further investigation.


Robbie
2021 Plus Four -- Helga
211-WX-1433

"Fettlebodge"--A chief of the PaddyMogs