From Mercedes Wiki
The COckpit MAnagement and Navigation Device - COMAND for short - acts as a “command centre” for all Sound, Telematics and Telecommunications functions on Mercedes-Benz vehicles. Depending on vehicle specification, functions like the Radio, CD player, DVD player, navigation system with Dynamic routing, and Amplifiers are all integrated in the COMAND system.
A high-performance processor controls the system and manages the various programmes. If requested by the driver, the CD changer, sound system, TV receiver, Telephone and Linguatronic Voice control system can also be linked up to COMAND via an optical fibre ring bus named D2B or MOST.
The latest generation of the COMAND system used in the Mercedes-Benz S-Class boasts a large colour TFT screen in 16:9 (widescreen) format, and uses a multidirectional wheel - located in the centre console - to navigate and use the numerous menus and functions. The system allows the control of a huge number of features, from seat bolster inflation to the satellite navigation.
The COMAND APS system includes a navigation computer with a second DVD player in the boot.
With the Mercedes-Benz COMAND APS system, for instance, the car radio can act in concert with the telephone to establish contact with a service provider that will transmit digital traffic-jam warnings to the navigation system via Short message service and recommend a detour if necessary.
The Speech technology engine, used in the application is provided by Nuance Communications.
Other car manufacturers use similar technologies in their car, including Audi with its Multi Media Interface system and BMW with its IDrive system.