I've got a weird issue with my S60 and am wondering if anyone has ideas as I've stumped the folks at the local dealership. When the car is put in park and turned off then restarted, after it comes out of park and you put your foot on the accelerator (either forward or reverse), there's an audible click that seems to come from somewhere in front of the driver and you can "feel" the click in the gas pedal. It only happens once and within the first couple of feet of motion. It's almost as if someone is plucking a guitar string without the reverberation. If you just stop the car and put it in park, then back to drive without turning off the engine, the problem doesn't occur. Also never happens once the car is moving including after stopping at traffic lights.

It's a fairly new car to me ... may always have done this, couldn't say.

Would appreciate any ideas! Thanks!