I doubt it, when the ATTESSA fluid gets low it just stops working But yeah I wouldnt have a clue, could be drive shaft maybe?
Does it happen under heavy acceleration, light acceleration, coasting, light braking, heavy breaking, light turn left, heavy turn left, light turn right, heavy turn right, easy on the gear changes in triptronic, hard gear changes in the triptronic, light gear changes in auto, heavy gear changes in auto.................?
Explain "feel it through the accelerator pedal"? Does it move on it's own? is the rpm steady/irratic when it happens? Does the motor seem to stutter when it happens?