Infinity Radio & miles to Empty gage

I recently purchased a 2005 XG350L and I love the ride of the car. I have had a problem with my Infinity Radio since I purchased the car. 1) Radio on no sound. 2) Blown speaker 3) Heavy static on local radio stations. It's been since June 22 06, that they had my car and couldn't find the problem. I finally got a call from them today July 18 06 and they said they fixed the problem. lol!!!!

They said the problem was the stereo wire leading back to the amp was pinched under the back seat. I find out tomorrow when I pick it up.

My next issue is with the miles to empty gauge when I stop at a light the gage fluctuates to higher miles and when I take of from the light it fluctuates again. Appears the laws of enertia are efffecting the gauge when cars in operation. And the dealership tells me it's normal.