Fairly sure the radio isn't the main failure as it stopped working about 4 years ago, the same time as the GPS, and long before my recent woes started.
To conclude the weird instrument cycling I can live with, the lack of central locking is inconvenient but liveable, and the uncertainty whether it all might suddenly stop has been mitigated by the fact its still running 2 weeks later.
So unless it gets significantly worse I'll keep it running until something else goes wrong