Gogo

The navigation in my 07 IS250 always has the arrival time an hour ahead of the actual time of arrival.

Example: If I set my navigation at noon for a 4hr trip, the arrival time on the navigation system will say 5pm. The navigation says it is a 4hr trip but still has a 5 hour time of arrival. I hope this is clear....my question being is there any way to set the time on the navigation system itself? I am set in the proper time zone FYI AND I have the speed settings on the roadways set at the speed inwhich I drive. The lady at the dealership said that in time the navigation system will adjust to my driving tendancies....????

Excuse my ignorance, but am I correct in stating that ONLY the IS350 is equipped w/ the VDIM? If so, why isn't the 2007 IS250 awd equipped w/ this feature?