Well I bit the bullet and got the fozzy as detailed in my post. So far the rear diff temp dash light is intermittently on/off but mainly on, even from cold so it's probably a wiring /sensor fault.
The DPF light was on so took it to Carnetix in Melton who were great and said it's an oil dilution problem so I need to get my !Removed! in gear and change the oil.
The sat nav will not recognise uk postcodes so I assume the dvd needs updating, only problem is that the screen will not tilt to give access to the discs! 🤦🏻♂️.
Other than that, enjoying it 😁😁😁.