I am coming across two different issues with my 2012 Audi Q5 and I am wondering if they are related. Note that the car started out as being bought in Southern California, lived most of its life in the Mojave desert in warm climates and is now in the midwest in a city that get its fair share of winter blasts
If I have the car completely outdoors in a cold climate, like 40 degrees Farenheit or below for anything more than 1 hour, my key remote fails to open the doors of the car. I can sit there and click the remote all I want and the car will not respond in any way. It's as if the radio that picks up the key fob is not even on or frozen in some way. I have to open the car using the manual key and it works just fine.
If I have the car in a covered garage (not a private garage, more like a parking structure), it is still cold but not as cold as outside. It gets to be like 50 degrees Farenheit or below. If I leave the car for more than about 16 hours or so, there is a pretty good chance that I will come out to a dead battery. The car will simply not start and requires a jump start to do anything. When it's very cold out, I have had the battery die on me in less than 12 hours of the car sitting.
Obviously, Issue 2 could be caused by a phantom power drain. But isn't it also possible that it's caused by Issue 1? Is there something in the operation of the key fob radio that could be causing the issue here? Or even both issues?