400HCapeCod

Thanks everyone. It is momentary. So I guess it is normal.

Thanks Bob, I was concerned about the car rocking forward when the engine comes on. But it sounds like it's normal.

I just bought an 08 RX400H. When I sit parked for awhile the engine shuts off. When it recycles back on to run the heater the car shakes. I wonder if this is normal or should I take it to the dealer.