Audi q3 issues - DAB

[Abi]

I bought my q3 back in April and it turned 3 in August. Over recent months I’ve had the following issues and wondered if anyone knew what this could be?

- when putting on the rear demister it cuts out the dab radio and the rear demister seems very intermittent and some days by the time I’ve drove home it’s still not cleared 

- when using a phone charger this too cuts out row DAB radio 

- the engine temperature gage seems to be affected some how for some reason, this too is intermittent, takes time for the pin to move up to any temperature and I noticed when looking at it the other day on the odd occasion that the pin then dropped by 20c

Any advice or support on this would be appreciated