Overall network (GVN) function - GF00.19-P-0001PP
MODEL 203.0 /2 /7 up to 23.4.04
Networking of Controller Area Network (data bus/CAN bus) (CAN)
Networking of digital data bus (D2B)
Depending on the country and the equipment, the following control units can also be integrated in the D2B:
- E-call control unit (only
,
)
- SDAR control unit (only
Function
Most control units are linked to each other via data bus lines. Control commands or messages are coded and placed on the data bus on a message-orientated or address-orientated basis, the individual control units having different priorities i.e. different access rights.
The coded commands or messages can now only be received by control units for which access is authorized.
The corresponding actuators are then actuated by these control units. In certain cases, various received messages are also combined in a control unit to form a new message. The new message is then also available for other control units on the data bus system.
Basically, the following data bus systems are involved in the networking:
- Controller area network bus class B (interior compartment) (CAN B)
- Controller Area Network bus, class C (engine compartment) (CAN C)
- Digital databus (D2B)
Distinguishing features
- The CAN-B is responsible for data transfers in the vehicle interior. It interconnects the different systems that can be operated by the driver or the front passenger (e.g. power windows, interior air conditioning). The CAN-B operates at a transfer rate of 83.3 kbits/ sec.
- The CAN-C is responsible for data transfers in the engine compartment for the propulsion and chassis systems. The CAN-C operates at a transfer rate of 500 kbits/sec.
- D2B is an optical data bus system. Here, data are transferred via fiber optic cables to the connected information, navigation or communication components. The D2B operates at a transfer rate of 5.6 Mbit/s.
Higher demands are placed on the CAN-C with regard to immunity to interference, e.g. with respect to electromagnetic effect or radiation and the data transfer rate.
Data transfer between the bus systems
The following control units form the interface between the bus systems:
- The electronic ignition switch control unit (N73) connects CAN-B and CAN-C.
- The COMAND operating, display and controller unit (A40/3) or the radio (A2) connects CAN-B and D2B.
The EIS [EZS] control unit (N73) also forms the interface between the control units on CAN-B and the line to the data link connector for STAR DIAGNOSIS.
As of 1.7.02 a steering column module (N80) is fitted which is connected with CAN-B and CAN-C. However this is not used as an interface (Gateway). All the button operations on the multifunction steering wheel (MFL) as well as switch operations are read in by the steering column module (N80) and placed on CAN-B. Changes in the driving direction are detected by the steering angle sensor and placed on CAN-C via the steering column module (N80). These signals are then available to the Electronic Stability Program (ESP) with code (472) Electronic Stability Program (ESP) and to the Distronic (DTR) with code (219) Distronic (DTR).
Although the instrument cluster (A1) is connected both to the CAN-B and CAN-C and exchanges data with both bus systems, it does not serve as an interface (gateway)
| CDI control unit, location/task/function | Engine 611.962, 612.962/990 | GF07.16-P-3102IA | |
| Engine 646.962/963 | GF07.16-P-3102IB | ||
| ME-SFI control unit, location/task/design/ function | Engines 111.951/955 with code (925) low pollution EURO3 | GF07.61-P-5000GS | |
| Engine 112.912/916/946/953 | GF07.61-P-5000F | ||
| Engine 112.961 | GF07.61-P-5000H | ||
| Engine 271.942 | GF07.61-P-5000KE | ||
| SEQ control unit, location/task/design | Transmission 716.6 with CODE (424) Sequentronic automated manual transmission (SEQ) | GF26.19-P-4009P | |
| ETC control unit, location/task | Transmission 722.6 | GF27.19-P-4012G | |
| Electronic selector lever module control unit, location/task/design | Transmission 722.6 | GF27.19-P-5138P | |
| ESP control unit, location/task/function | Up to 31.7.01 with code (472) Electronic Stability Program (ESP) | GF42.45-P-4500C | |
| As of 1.8.01 with code (472) Electronic Stability Program (ESP) | GF42.45-P-4500T | ||
| Upper control panel control unit, location / task / design / function | GF54.21-P-4105PP | ||
| Front SAM control unit with fuse and relay module, location/task/design | GF54.21-P-4108PP | ||
| Rear SAM control unit with fuse and relay module, location/task/design/function | GF54.21-P-4115PP | ||
| Lower control paneling control unit, location/ task/design/function | On vehicles with code (219) Distronic (DTR) or with code (228) Stationary heater or with code (450) Taxi version | GF54.21-P-4116PP | |
| Steering column module, location/task | Vehicles as of 1.07.02 | GF54.21-P-4125Q | |
| Instrument cluster (IC), location / task | GF54.30-P-3039PP | ||
| PTS control unit, location/task | On vehicles with code (220) Parktronic system (PTS) | GF54.65-P-4100PP | |
| Rear door control unit, location / task / design / function | Model 203.0/2 | GF72.29-P-4102PP | |
| Front driver side door control unit, location/task/ design/function | GF72.29-P-4105PP | ||
| Front passenger door control unit, location/task/ design/function | GF72.29-P-4106PP | ||
| Electronic ignition switch control unit, location/ task/design/function | GF80.57-P-4102PP | ||
| Trailer recognition control unit, location/task | On vehicles with code (550) trailer coupling. | GF82.10-P-2106S | |
| Overhead control panel control unit, location/ task/design | GF82.20-P-4110A | ||
| Multifunction control unit for special-purpose vehicles (MSS), location/task/design | On vehicles with code (450) Taxi version, with code (934) Taxi emergency alarm unit, with code (930) Taxi emergency call, for government vehicles, for vehicles with panic alarm | GF82.25-P-4106PP | |
| Radio control panel, location/task/design/function | On vehicles with code (756) MB Audio 10 radio/CD with traffic news decoder/RDS | GF82.60-P-3115A | |
| On vehicles with code (753) MB Audio 10 CC radio with traffic news decoder/RDS | GF82.60-P-3115B | ||
| Radio, location/task/design/function | On vehicles with code (353) Audio 30 APS | GF82.60-P-4109P | |
| Sound amplifier, location/task/design/function | On vehicles with code (810) Sound system | GF82.62-P-3100Q | |
| CD player with changer, location/task/design/function | On vehicles with code (819) CD changer | GF82.64-P-3113P | |
| On vehicles with code (353) Audio 30 APS and code (819) 6-disk CD changer | GF82.64-P-3113PA | ||
| On vehicles with code (352) COMAND operating and display system and code (819) CD changer and code (491) USA version |
GF82.64-P-3113R | ||
| Telephone interface, location/task/design/ function | On vehicles with code (854) MB portable CTEL | GF82.70-P-3107P | |
| Telephone transmitter/receiver (D-net), location/ task | On vehicles with code (853) MB standard telephone | GF82.70-P-4107D | |
| Voice control system control unit, location/task | For vehicles with code (813) Voice control system (VCS [SBS]) | GF82.70-P-4113A | |
| Universal Portable CTEL Interface (UPCI [UHI]) control unit, location/task | For vehicles with code (388) portable CTEL Universal Portable CTEL Interface System | GF82.70-P-5100P | |
| Satellite radio, location/task | On vehicles with code (352) COMAND operating and display system and code (491) USA version | GF82.85-P-3113BA | |
| Operating-display unit with control unit, location/task/design/function | On vehicles with code (352) COMAND operating and display system and without code (491) USA version and without code (498) Japan version | GF82.85-P-3114P | |
| On vehicles with code (352) COMAND operating and display system and code (498) Japan version | GF82.85-P-3114PJ | ||
| On vehicles with code (352) COMAND operating and display system and code (491) USA version | GF82.85-P-3114R | ||
| TELE AID control unit/task/design/function | On vehicles with code (855) TELE AID and code (930) Taxi emergency call | GF82.95-P-4100P | |
| E-call control unit, location/task/design | On vehicles with code (349) E Call emergency call system and code (498) Japan version | GF82.95-P-4200A | |
| Transmitter-receiver, location/task/design/ function | On vehicles with code (853) MB standard telephone or code (855) TELE AID or code (930) Taxi emergency call | GF82.95-P-4300A | |
| Heating push-button control unit, location/task | On vehicles without code (580) Air conditioning (or Tempmatic for USA) and without code (580) Automatic air conditioning and without code (581) Automatic air conditioning and without code (581) Comfort automatic air conditioning |
GF83.20-P-2120PP | |
| Control and operating unit for automatic air conditioning, location/task | On vehicles up to 31.5.01 with code (580) Air conditioning (or Tempmatic for USA) On vehicles as of 1.6.01 with code (580) Automatic air conditioning |
GF83.40-P-2180PP | |
| Comfort automatic air conditioning control and operating unit, location/task | On vehicles up to 31.5.01 with code (581) Automatic air conditioning On vehicles as of 1.6.01 with code (581) Comfort automatic air conditioning |
GF83.40-P-2181PP | |
| Stationary heater/heater booster control unit, location/ task | On vehicles with code (228) stationary heater | GF83.70-P-4002A | |
| Left front seat adjustment control unit with memory location/task | On vehicles with code (275) Electrically adjustable driver seat, steering column and outside mirrors with memory or with code (242) Electrically adjustable front passenger seat with memory |
GF91.29-P-2106PP | |
| Right front seat adjustment control unit, with memory location/task | On vehicles with code (242) Electrically adjustable front passenger seat with memory | GF91.29-P-2107PP | |
| Control unit for emergency tensioning retractor with airbag, location/task/design | GF91.60-P-4007PP |