I have an 08-V. Fill the power steering reservoir and drive all day without it leaking down but it dumps in a day and a half if parked. Nobody seems to be able to locate the source of the leak. Any one else dealt with this?
While I haven't had this problem, my first guess is, if the reservoir is full, the heat from when the car is first stopped for a while causes expansion. Can you try putting something under the reservoir to catch fluid when you park the car. If it catches fluid, you know where the leak is. If not, try putting something to catch the fluid in a different area each time you park the car until you narrow down the location.