My 03 allroad received arnott front bags 25k ago car now has 115k on it and is experiencing strange settling front and rear passenger side over night. It seems to only be apparent in cold weather and it occurs in all ride heights. I don't think it is leaky bags b/c the front is new and the rear rarely leak as I understand. I have tried the soapy water test on the bags and around the compression seals on the hoses and don't see any signs of leaking. I find the car sagging in the morning and this is the strange part with the car still off I open the door and the car then levels itself with the reserve air in the pressure tank. When the car is started there are no suspension lights on and the compressor doesn't kick on so I am not depleting the tank, green light may flash for a few moments thats it. First question what excites the suspension to level when the door is opened? Is it an electrical issue? Weak battery, ride hight sensors, corroded connections on the suspension control valve, or the suspension control valve itself. Why is it related to temperature? Valves freezing, seals shrinking, holes in bags.... Any insight would be appreciated