Car has 46,000 and it is well cared for by the dealer. They do all my scheduled maintenance, etc. 10 months ago they replaced one of the motor mounts as I noticed a vibration. The vibration did not go away. If I drive 70 mph or the car is parked with the engine on, the same vibration is felt even with the A/C on or off. This vibration is annoying and has the service Dept at a lost. They have put in their report that the car has a higher than normal vibration. In the meantime I am waiting to hear from the district service mgr.Has anyone had a similar problem and or any suggestions? Help...