2006 E350 Nav upgrade to the latest version
Ok so I have looked through the site and I see Nav upgrades but I have a few questions.
1. If you upgrade the Nav system can it be done by purchasing the CD only, or do you need an actual software upgrade to the Nav head unit?
2. What are the costs of both?
3. Will it void the warranty of the car?
I know I know, but I am **** about voiding the warranty.
Thanks in advance for your help!



