Telematics services communications module, component description - GF82.85-P-0220FQ

MODEL 218 with CODE 350 (Ecall emergency call system, Europe)

MODEL 218 with CODE B54 (Live Traffic Information)

Shown on model 218.3 up to 31.08.2014

Fig 1: Identifying Telematics Services Communications Module Components - Shown On Model 218.3

Courtesy of MERCEDES-BENZ USA

Location

The telematics services communication module is located in the trunk under the anti-slip mat on the cross member.

Tasks

The telematics services communications module establishes the connection to the service provider and controls the functions connected to the telematics services in the vehicle.

During navigation with real-time traffic data (with CODE B54 (Live Traffic Information)), the telematics services communications module has the following tasks:

Via the emergency call system antenna (A2/52), the telematics services communications module receives real-time traffic data from the service provider and forwards it via a USB (Universal Serial Bus) connection to the COMAND controller unit (A40/3) (with CODE 531 (COMAND APS)).
The telematics services communications module receives position data from the COMAND controller unit via a USB connection and sends it to the service provider via the emergency call system antenna.

In the emergency call system (with CODE 350 (Ecall Europe emergency call system)), the telematics services communications module has the following tasks:

Prioritization of the services in the internal arithmetic unit
Receiving the control signal of the emergency call system button (S93/3) (manual emergency call), actuation of the light-emitting diode in the emergency call system button (to display status) and sending of check signal to the emergency call system button (for self-diagnosis of emergency call system) over the overhead control panel control unit (N70) (with CODE 414 (Power glass sliding roof)) or the overhead control panel electronics (N70/3) (except CODE 414 (Power glass sliding roof)) (input and output)
Establishing a voice or data link to the service provider via the emergency call system antenna (input and output)
Receiving of global positioning system (GPS) data for position finding from the multifunction antenna (A28/11) (with CODE 505 (20 radio NTG5 non-navigation-capable)) (input)
Receiving the microphone signals from the audio equipment (input) during hands-free mode
Sending audio signals in hands-free mode to the center instrument panel speaker (H4/27) (output)
Sending a mute signal to the sound system amplifier control unit (N40/3) (with CODE 810 (Sound system) or with CODE 811 (Advanced Sound System)) or to the audio equipment (except CODE 810) Sound system and except CODE 811 (Advanced Sound System)) (output)
CAN communication via the diagnostic CAN (CAN D) with the front SAM control unit with fuse and relay module (N10/1)

In the emergency call system (with CODE 350 (Ecall Europe emergency call system)), the telematics services communications module can receive, e.g. the following CAN signals over the front SAM control unit with fuse and relay module:

Status of "circuit 15R" from electronic ignition lock control unit (N73) as trigger signal for self-diagnosis of emergency call system
Cyclic standby signal ("vital sign") of the supplemental restraint system control unit (N2/10) as a check signal
Crash signal from supplemental restraint system control unit as trigger signal for the automatic emergency call
"Central locking emergency opening" signal from the front SAM control unit with fuse and relay module as a redundant trigger signal for the automatic emergency call
Control signals of the button groups on the multifunction steering wheel from the instrument cluster (A1) (e.g. volume control, muting, establish or disconnect connection)
Signals of the steering angle sensor (N49) from the steering column tube module control unit (N80), for position finding
Wheel speed signals from the Electronic Stability Program control unit (N30/4) (except CODE 233 (DISTRONIC PLUS), except model 218.374) or from the Premium Electronic Stability Program control unit (N30/7) (with CODE 233 (DISTRONIC PLUS) or model 218.374), for position finding
Position data from the audio equipment (with CODE 357 (Map navigation), with CODE 522 (Audio 20 radio) or with CODE 531 (COMAND APS)), for position finding

The telematics services communications module can send, e.g. the following signals in the emergency call system (with CODE 350 (Ecall Europe emergency call system)):

Display messages for display on the Audio/COMAND display (A40/8) to the audio equipment

Wiring diagram for telematics services communications module control unit

PE82.85-P-2105-97XAA