Telematics Services Communications Module, Component Description - GF82.85-P-0220RR

Model 190

up to model year 2017

With Code 350 (Ecall emergency call system, Europe)

Model 190

up to model year 2017

With Code B54 (Live Traffic Information)

Shown On Model 190.3 With Code B54 (Live Traffic Information)

Fig 1: Telematics Services Communications Module Components Location - Model 190 Up To Model Year 2017 With Code 350, B54 (Shown On Model 190.3)

Courtesy of MERCEDES-BENZ USA

Location

The telematics services communications module is located in the trunk at the right sidewall on a bracket.

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:

The telematics services communications module receives real-time traffic data from the service provider over the emergency call system antenna (A2/52) and routes the data over a USB connection (Universal Serial Bus) to the head unit (A26/17).
The telematics services communications module receives position data from the head unit over a USB connection and sends it to the service provider over 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
Establishing a voice or data link to the service provider via the emergency call system antenna (input and output)
Sending a muted signal (Mute) to the sound system amplifier control unit (N40/3) (with code 810 (Sound system)), to the advanced sound system amplifier control unit (N40/7) (with code 811 (Advanced sound system)) or to the head unit (except code 810 (Sound system) and except code 811 (Advanced sound system)) (Output)
Reception of microphone signals when using the hands-free system from the head unit (input)
Sending of audio signals when using the hands-free system to the center instrument panel midrange speaker (H4/27) (with code 810 (Sound system) or with code 811 (Advanced sound system)) or to the emergency call speaker (H4/48) (except code 810 (Sound system) and except code 811 (Advanced sound system)) (output)
Receiving of global positioning system (GPS) data for position finding from the GPS antenna (A2/23) (with code 520 (Audio 20 USB)) (input)
Receiving of control signals from SOS button (N70/3s5), from breakdown assistance button (N70/3s10) or from MB-Info button (N70/3s11) (input)
Sending LED actuation to the SOS button, the breakdown assistance button or the MB-Info button (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 from touchpad (A105) (with code 531 (COMAND APS)), from the Audio/COMAND control panel (A40/9) or from the ON/OFF button with volume control (S67)
Control signals of button groups on multifunction steering wheel from the steering column tube module control unit (N80) (e.g. volume adjustment, muting, connecting or disconnecting)
Signals of the steering wheel angle sensor (N49) from the steering column tube module control unit, for position finding
Wheel speed signals from the Electronic Stability Program control unit (N30/4), for position finding
Positioning data from the head unit (with CODE 531 (COMAND APS)), for position finding

In the emergency call system (with code 350 (eCall Europe emergency call system)), the telematics services communications module can transmit the following CAN signals, for example:

Display messages for showing on the Audio/COMAND display (A40/8) to the head unit