The outside temperature sensor is showing a reading that is 5 degrees too low

Dear A6 experts,

My outdoor temperature display has recently been showing a reading that is consistently about 5 degrees too low. Regardless of whether...

It's either cold or warm outside. Can this be adjusted, or do I need a new sensor?

to be installed. 'Regarding the inquiry about Audi, well, that would probably require a new...'

'Let's try it,' but 'we don't have something like that here.'

Thank you for your help.