A pop-up window on the unit's screen will show confirming the upgrade, it can take 20-40 minutes on average. Simply check your vehicle uses the same disc type, purchase the DVD, switch on the unit in the dash, eject all your current discs in the unit, insert the new navigation disc and wait. If you need to update your Mercedes Benz navigation unit with the latest Australian or New Zealand maps then it's a very simple process. Navigation DVD for Mercedes-Benz Comand APS Radio Systems NTG 4 C-Class and SLK - Latest Genuine Version!
