GF82.95-P-3211RIU MB-Info and Breakdown Assistance Button Group, Component Description

GF82.95-P-3211RIU MB-Info And Breakdown Assistance Button Group, Component Description
- with CODE (359) TELE AID emergency call system

Component Identification:

Location
The MB-Info button integrated into the MBInfo and breakdown assistance button group and the integrated breakdown assistance button are located in the stowage compartment in the center console below the armrest.

Task
^ Actuation and display of MB-Info call
^ Actuation and display of breakdown assistance (Roadside Assistance)
^ Receiving signals
^ Transmitting signals

Actuation and display of MB-Info call
- Actuation of MB-Info call by pressing MB-Info button (symbol is the letter "i") and display of operating status on integrated light-emitting diode (LED)

Actuation and display of breakdown assistance
- Actuation of breakdown assistance (Roadside Assistance) by pressing the breakdown assistance button (symbol is a wrench) and display of operating status on integrated LED

Receiving signals

Direct lines
- Circuit 31 (ground) over discrete line
- Circuit 58d for night illumination over discrete line
- Control signal for LED integrated into MB-Info button over discrete line from emergency call system control unit (N123/4)
- Control signal for LED integrated into breakdown assistance button via discrete line from the emergency call system control unit

Transmitting signals

Direct lines
- Actuation signal from MB-Info button over discrete line to emergency call system control unit
- Actuation signal from breakdown assistance button via a discrete line to the emergency call system control unit

Design
The MB-Info and breakdown assistance button group consists of the MB-Info button and the breakdown assistance button, each of which consists of the following components
- One each integrated LED for night illumination (circuit 58d)
- One each integrated LED for display of the operating statuses (MB-Info call or breakdown assistance)
- One control resistor each connected in parallel to the switch contact

Function
In the rest position, an electric current flows through the built-in control resistors for the MB-Info button and breakdown assistance button (parallel to the switch contact). This allows the emergency call system control unit to determine whether the feed lines and ground line are OK. When the MB-Info button or the breakdown assistance button is pressed, the respective control resistance is bridged by the respective switch contact.
The MB-Info button and breakdown assistance button are read in by the emergency call system control unit over a discrete line. When the MB-Info button or the breakdown assistance button is pressed, the emergency call system control unit transmits the corresponding request. The emergency call system control unit then intermittently (partially off) actuates the particular LED.
The driver is provided with visual feedback about the actuated function for as long as the relative function is active in the form of a flashing LED.