Just got a 2006 c230 sport with nav and am a little disappointed with the display on the navagation. I have the 2004 version 1.4 DVD. Would a newer disk improve the graphics for this? I find it difficult to believe that navagation in this car is so...(blah). I previously owned a lexus with a nav, and the it was a night a day difference. Also a friend of mine has an S500 with nav, and his is very detailed. I know the difference in price is substantial. He has a 2005 DVD disk. I was told that his disk would not work in my car. That is fine, but what can I do to improve my detail?

Thank you very much.

Vinny