Full-fledged in-dash navigation systems are the aftermarket answer for a vehicle that did not have a premium audio offering. Not only do these systems include navigation, but typically are the center for a full vehicle entertainment system, including satellite radio options and DVD audio and video offerings.
As with any control center, it is important to spend some time hands on with these units as ease of use for the driver is important in eliminating driver distractions. While not all features are enable while driving, it is also important to understand how the system works before heading out on the road with one. For this reason, it is usually better to buy a system like this from an Authorized and Trained installation shop as one-on-one training is available.
Most of these units will work with an existing factory system, but it is important to make sure they will before purchase, as some will require the additional purchase of amplifiers to operate properly. Also, the addition of modules and service plans are sometimes required to enable all the features, check on this to be sure of the details before your final decision.
