Update: SOLVED! Working with the Service Advisor, we learned that the vehicle was behind on software updates. I choked at the price, as it was over $600. SA claimed that Volvo actually charges the dealer for these, so he could not mark them down. (We also learned that other major car manufacturers, ...

This high-pitched noise is on for 3 seconds then off for 3 seconds and then back on the 3, off for 3 - intermittent like that - for as long as the car is on. It is not coming from the engine compartment. It is on whether the A/C is on or off. We have tried to see if it stops or changes if you turn o...