On a car that sits for extended periods how about drying the air with a dessicant filter before the air filter inlet? Just have to remember to remove it before starting the engine/ using the car.

__________________
85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked