My radio comes on without any reason!   I can be driving along with the radio off and it can start.  Also I can be sitting in the stationary car with the engine and radio off and often when the passenger door is opened  the radio will start. Has anyone experienced this intermittent fault or can supply an explanation?

certainly sounds like a loose connection or short circuit to power up the radio but exactly where not sure.
If the car is 2024 then it should have a warranty on it - best to take back to the dealer and get them to resolve it before it becomes a more expensive issue
 

Thanks for that!   Will try to get dealer to find the problem under the warranty ie free of charge!