Vehicle remote door unlocking, function - GF82.95-P-2018LEU
MODEL 216 with CODE (359) TELE AID emergency call system as of model year 09/YoM 08
MODEL 221 with CODE (359) TELE AID emergency call system as of model year 09/YoM 08
Function requirements
- Circuit 30
- No undervoltage or overvoltage
- Emergency call system authorized and operating properly
- The vehicle-related vehicle remote door unlock service is separately authorized
- An emergency call system control unit (N123/4) communication module authorized for the corresponding vehicle-related service is configured ex-factory with the telephone number of the corresponding service provider
- The customer is registered and authorized at the service center
- One mobile phone network is available in sufficient strength and quality
- Telephone call by customer to service center and request for vehicle remote door unlock as well as identification (authorization) at service center
- Actuation of the trunk lid external operation switch (S88/8) for at least t = 15 s at a time agreed upon with the service center
- A higher-priority vehicle-related service is not active
- Vehicle-related service Vehicle remote door unlock activated in EIS control unit (N73)
General
The vehicle remote door unlock function allows customers to have the vehicle unlocked remotely when the have locked the transmitter key (A8/1), for example, and a 2nd transmitter key is not available.
Function sequence
Actuation of the tailgate external operation switch is received by the emergency call system control unit via the following route:
- Direct line
- Rear SAM control unit with fuse and relay module (N10/2)
- Interior CAN
- Central gateway control unit (N93)
- Diagnostic CAN
The emergency call system control unit then automatically transmits an SMS with the following data to the service center, via the communication module integrated into emergency call system control unit:
- Vehicle identification number (FIN)
- Vehicle model
The communication module integrated into the emergency call system control unit transmits the mobile phone signals or data via the following route:
- Direct line
- Frequency switchover control unit (N96), model 221 with code (389) Mobile phone preinstallation with universal interface, USA/Canada
- Emergency call antenna (A2/52), model 216
- Telephone and GPS roof antenna (A2/49), model 221
The emergency call antenna is integrated in the GPS antenna (A2/49a2) in model 216.
The service center compares the data sent with the request and customer legitimization and if the data matches a "vehicle remote door unlock request" is sent to the vehicle.
The communication module integrated into the emergency call system control unit receives the "Vehicle remote door unlock request" and the mobile phone signals or data over the following via the following route:
- Emergency call antenna, model 216
- Telephone and GPS roof antenna, model 221
- Frequency switchover control unit, model 221 with code (389) Mobile phone preinstallation with universal interface, USA/Canada
- Direct line
After receiving the "Vehicle remote door unlock request", the emergency call system control unit transfers the request to the EIS control unit via the following route:
- Diagnostic CAN
- Central gateway control unit
- Chassis CAN
The EIS [EZS] control unit then initiates the unlocking of all vehicle doors and the unlocking of the trunk lid.
If the "Vehicle remote door unlock request" is refused by the service center because, for example, the trunk lid external operation switch was not actuated at the time agreed on or legitimization was incorrect, the vehicle remote door unlock function is disabled for t = 15 min.
The execution of the vehicle remote door unlock is displayed by a message in the instrument cluster (A1). Moreover, the red light- emitting diode (LED) in the SOS pushbutton switch (S93/3) flashes.
In the event of vehicle remote door unlock, other vehicle-related services (e.g. MB-Info call) are interrupted.
If the telephone and GPS roof antenna, model 221, or the emergency call antenna, model 216, fails (e.g. malfunction caused by rollover) the emergency call system control unit transmits and receives the mobile radio signals and data via the following route in order to transfer mobile radio signals and mobile radio data:
- Direct line
- Emergency call system antenna splitter (A2/25)
- Direct line
- Emergency call system left backup antenna (A2/54)
- Emergency call system right backup antenna (A2/55)
The maximum period of time between actuation of the trunk lid external operation switch and unlocking all vehicle doors and unlocking the trunk lid is t = 5 min (normally t = 1 min).
| Electrical function diagram for vehicle remote unlocking, function | Model 216 | PE82.95-P-2065-97CAA | |
| Model 221 | PE82.95-P-2065-97SAA | ||
| Instrument cluster, component description | A1 | GF54.30-P-6000LE | |
| Rear SAM control unit with fuse and relay module, component description | N10/2 | GF54.21-P-6030LE | |
| Component description for the EZS control unit | N73 | GF80.57-P-6003LE | |
| Central gateway control unit, component description | N93 | GF54.21-P-4170LE | |
| Emergency call system control unit, component description | N123/4 | GF82.95-P-3212LEU |