Fluids - Age vs Mileage

[eicheldp]

A few months ago, I purchased a 2004 S with a Tiptronic and the car had 15,500 original miles. The last owner had the car for 3 years, drove it 2000 miles and did nothing to the car.

I immediately changed the oil and had the 15,000 mile service performed at the dealer. The dealer added 1/2 gallon of coolant and the fluid level was ok in the transmission.

My question concerns mostly the fluids in the car. Does age matter vs the mileage driven? The car is 10 years old now with very low mileage. Currently, the car is stored for winter and this spring I will need to replace all the tires (originals on the car). I'll spring for replacing the fluids but not if I don't have to.

Your advice will be greatly appreciated. Thanks in advance.