Modular control system (MCS), function

P82.85-5236-01

The following systems can be operated centrally with the aid of the radio and navigation unit (A2/56):

 Cassette deck

 Radio

 Single CD player and CD player with changer (optional)

 Sound system (optional)

 Navigation (optional)

 Telephone (optional)

Navigation processor with

GPS receiver and

gyrosensor

CC drive

Central

computer

Audio signal

processing

CD drive

Diagnosis

Radio tuner

Radio and navigation unit

(A2/56)

Sound amplifier

(A2/13)

FM/AM
amplifier (A2/18)

Activation

Datalink connector (X11/4)

FM/AM

Signals

Rear window antenna

(A2/32)

FM

AM

AF signals

Vehicle loudspeaker

Antena splitter

Radio

(A2/5)

AM

AM

FM

Microphone

(B25/6)

D2B

Traction systems control module N47)

GPS/telephone roof antenna (A2/49)

(A35/8)

(A34)

D2B

D2B

1 GPS

Microphone

(B25)

(A2/6)

D2B

2 GPS

Block diagram for entire MCS system

illustrated with following equipment specification:

 Sound system (code 810)

 CD changer (code 819)

 with telephone

A2/49 Cellular telephone and GPS roof antenna

A34 Telephone handset

A35/8 E-call control module

B25 Hands-free system microphone

B25/6 Sound amplifier microphone

GPS Global positioning system

1 GPS Global positioning system for navigation

2 GPS Global positioning system for E-call (code 349)(only  )

D2B Digital data bus

AF Audio frequency (20 Hz ... 20 kHz)

A2/6 CD player with changer
(in trunk)

MCS system

The radio and navigation unit (A2/56) is the central component of the MCS system. It has a video-capable 5" active matrix TFT display for indicating information such as control menus and map data for navigation.Actuation is accomplished in operating modesNTSC (US standard) PAL (ECE standard).It is operated with fixed function keys and a rotary knob, a joystick as well as with menu-guidance on the display.

The basic version of the radio and navigation unit (A2/56) is equipped with

 a radio reception unit,

 a compact cassette player and

 a speed-dependent volume control.

Diagnostic interface

To read out actual values and DTC's of the MCS and components connected via the digital data bus (D2B) diagnosis with the hand-held tester is possible via a K-line.

MCS bus system

The digital components of the radio and navigation unit (A2/56) are interlinked via the digital data bus (D2B). Control data, audio signals and other information are transmitted between the various system components via the digital data bus (D2B) Since some of the individual components operate with various data formats or place different requirements on the transmission speed and transmission security, various bus systems are installed.