09 S80- T6. This is a new one, going about 65 on the highway and suddenly this weird sound comes from what sounded like the driver side under the dash board. It did it 3 times during a 120 mile trip. Almost sounded like a leveling motor from a GM car? Talked to my local Volvo dealer where I purchased the car and they thought it could be a "blender door" sticking in the climate control system or the brake booster system. This thing is LOUD when it does it- but until we can get the thing to do it on call (which is impossible) it will be tough to diagnose. Any ideas or has anyone experienced anything similar. I doubt it was the blender door- the first thing I did was manually control the climate options so all doors opened and closed- no noise?