The first rule of the Maserati Navigation system is "don't use it". The second rule is to refer to rule #1. I hate the built-in nav system for many reasons, too numerous to detail, but the big issues were horrible place searching (in the USA, you need to enter a township name, not the city!), pitiful on-screen display of map data (only names the road you're on!), and outdated maps.
I highly, HIGHLY recommend you get a Garmin Nuvi. It is INFINITELY better than the Maserati nav system. It also gives you a workable handsfree phone system via Bluetooth. Comes standard with a suction cup windshield mount and rechargeable battery, AC charger, and automobile power cord. The nice thing with the battery is that it will run about 3-5 hours without a cord, so using it on short-to-medium trips doesn't require a cord.
I travel everywhere with mine, and added European maps via an SD card.
You can easily find one for under $500, and can add Europe (or North America, if you're in Europe) for about $200. It also offers a traffic receiver option (standard on the higher-end Nuvis).
Do yourself a favor and throw away your navigation CDs. The other added benefit is that you get an extra CD player slot, one that you don't need to open the trunk to change!