The Univeral Media Interface or UMI has generated a lot of interest and questions since it was launched for the C-Class and GLK last year. There have been some complaints about the system being slow and Mercedes has addressed that and launched the new and improved Nav + 4 with enhanced performance and funtionality.
Nav + 4 has the same features as UMI:
1 – Navigation with free live traffic
2 – iPod/iPhone Interface
3 – USB Interface
4 – AUX Interface
5 – Bluetooth Audio Streaming
The improvements to the system are:
5 times faster route calculation
5 times faster destination entry
5 times faster zooming
Day/Night changeover in real time
Updated navigation data
Alaska, Hawaii & Puerto Rico included
New functionality includes:
Reality View Pro (highway signs)
Traffic Lane Assist Pro (road splits)
Enter destination via map
The NEW part number is A204 870 7096 and the MSRP is $1685 plus labor. The price could vary depending on the equipment already present in your vehicle. Also, it should be possible to upgrade an old UMI to the enhanced Nav + 4 with a software flash.