I have a problem with very noticeable vibrations from the engine in the steering wheel and in the seats (that even makes my back tingle) when at a stop light in D or getting ready to reverse. Do other XC70 owners detect this type of vibration? I'm a new Volvo owner so maybe this is a common but with every other new car I've been in you can't even tell the engine is started unless you look at the tach.

I noticed a post somewhere and the Part No. 30671167 was mentioned with this link http://www.volvoclub.org.uk/vibrations.htm and the user that made the post described my problem exactly. I've taken the car to the dealer and none of the hydraulic mounts are leaking so I'm thinking I may have bad motor mounts.
How could the dealer see if the motor mounts are broken?

Thanks!