Function

Function

GPS Navigation/RTI With Integrated DVD







RTI With CD Changer







The GPS antenna (16/47) receives signals from a minimum of three and a maximum of eight GPS satellites. These signals are then sent on to the GPS receiver in the RTI control module (16/45).

The position of the car is calculated and a route is displayed for the selected destination.

Data for voice guiding for the selected route is transmitted on the serial bus (Melbus) between the RTI control module and the audio module (16/1).

In order for the RTI system to select a route, a DVD (16/45) or CD (16/48) must be available with the road network. For CD changer systems the data is transmitted on a serial bus (Melbus) to the RTI.

Data about speed, the wheel rotation counter and parking brake is sent using CAN communication from the central electronic module (4/56), ABS (4/16) and driver information module DIM(5/1).

Data is sent to the display screen (16/46) from the RTI control module on serial buses.

Commands from the remote control are sent from the display screen (16/46) to the RTI unit (16/45) on a serial bus (remocon signal).

The menu is accessed and used via the buttons on the reverse of the steering wheel. Data is sent from the steering wheel module (3/130) to the RTI unit (16/45) via the Control area network (CAN). There are three steering wheel buttons which are used to control the menu on the screen. There is a four-way switch on which each part of the switch moves the cursor upwards, downwards, to the left or to the right. There is an ENTER button and a BACK button.

When a new GPS antenna is installed for the RTI system, it may take up to 15 minutes before the GPS receiver has the correct information.

Traffic message channel (TMC) reception







The role of the TMC receiver is to receive traffic information on the FM wavelength.

The TMC receiver is integrated in the RTI system and is connected to the antenna system for the FM radio.

There is no traffic information system in the USA.

The TMC data signal is received by the TMC antenna (16/68) which is located in the rear bumper. The signal is boosted by the antenna amplifier (16/67) before it is sent to the RTI unit (16/45). This data is displayed on the screen (16/46).

TV Reception







The TV antenna pattern on the rear windshield (16/54) receives signals from the TV network. These signals are boosted in the TV antenna amplifier (16/71) which sends the signals to the TV receiver (16/36). The signals are sent on to the RTI unit (16/45) on a serial bus (Melbus). The RTI unit send the signals containing sound information to the audio module (16/1) on a series bus (Melbus) and signals containing picture information to the display screen (16/46).

When the vehicle speed exceeds 7 km/h the RTI changes to navigation automatically.

The SOURCE button on the audio module (16/1) or on the remote control is used to set the TV stations.