[header] How to select a gps car navigation system [title] Decide how often you intend to use the system. [step] Inexpensive systems simply plug in to your car's cigarette lighter and are small enough to store in your glove compartment, but they're not as user-friendly. [title] Consider the layout of your car. 
[step] Some systems come with a monitor that displays a map. The monitor is commonly installed on the dashboard or on a pedestal extending from the dashboard.