Just had first service on our 500X CROSS PLUS and now the heater fan is really noisy. Once car is warmed up it feels like the car is over revving and vibrating. Called tech out and they say it sounds like possible bearing and it needs to go in. Other than the usual electronic glitches the car has been great. Its got every possible extra and to-date we have suffered none of the problems other owners have experienced. Currently waiting to hear from dealership. Any info would be great. Many thanks!