CL 550 4MATIC (216.386) V8-5.5L (273.961) (2009)
Basic position finding is falsified when a vehicle rolls backwards with "circuit 15 OFF" (ignition switched off) or if it is transported somewhere. In both
instances, the deviation is automatically corrected by the navigation processor integrated into the emergency call system control unit when it receives
GPS data.
GF82.95-P-3005LEU Restraint System Control Unit Data, Function
GF82.95-P-3005LEU Restraint System Control Unit Data, Function
- with CODE (359) TELE AID emergency call system
Function requirements
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Status "Circuit 15R ON"
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Proper communication with restrain systems control unit (N2/7)
^
Automatic crash recognition including crash level by restraint systems control unit
General
In the event of an accident with airbag actuation, an automatic emergency call (E-Call) is transmitted immediately. An emergency call is sent out
regardless of the severity of the accident.
Function sequence
The emergency call system control unit (N123/4) receives the crash data from the restraint systems control unit, on the one hand via a direct line as a
digital crash signal and, on the other hand, it also receives the data (redundantly) including the crash level via the following route:
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Chassis CAN
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Central gateway control unit (N93)
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Diagnostic CAN
The restraint systems control unit sends a LIFE signal (the LIFE signal is the "life sign" from the restraint systems control unit) every t = 500 ms over the
same path as the crash information including crash level. This allows the emergency call system control unit to permanently monitor communication with
the restraint systems control unit and proper function of the crash recognition.