Naviagtion System ??
 

Hi All,

I am new here, and just bought a used 2001 ML 320. I am confused about the Navigation System. Apparently the Navigation Antenna is on the car, but when I hit the Nav Button on the side of the screen it says " No Navigation System Installed" does this mean I need the whole system installed, or can I just purchase the CD(software) and install that??? Please help me!!
Thank you

Allison