Hi Charlotte,
I have the exact same issue, so this thread is very interesting.
08 Audi A4
- Does not like cold weather at all.
- Constantly getting low battery warning. I charge it with a trickle charger when this happens. Usually fixes the issue.
- Door lock issues. Driver side won't unlock. Passenger side won't open from the outside.
- Over the last year, the car has died 3 times overnight. (All cold nights)
- The mechanic checked the battery/alternator health. They were good.
- Inside gets damp during cold weather.
I can't wait for summer already!!
Did you ever get to the bottom of it?