Overall network (GVN) function - GF00.19-P-0001TMA
MODEL 211.0/2 as of model year 08/YoM 07
Networking of the control units at the Controller Area Network bus class B (interior) (CAN-B)
Networking of the control units at the CAN-C, illustrated with engine 273 and transmission 722.9
MOST shown except code 494 USA version and except code 498 Japan version:
MOST shown with code 494 USA version and with code 536 SIRIUS satellite radio
MOST shown with code 498 Japan version
Overall network
A data bus is a data collecting line, the data of which can be used by almost all connected control units.
Function of networking
Most control units of the vehicle are linked to each other via data bus lines, in other words there is no direct electrical connection between a sensor and the executing actuator. A corresponding message (data) is generated using the sensor signal and made available to the data bus system.
The message is sent in a message-oriented or address-oriented manner and is evaluated by the respective control units; it can, however, be received by other control units and evaluated if necessary.
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.
Data bus systems
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)
- media-oriented system transport (MOST)
- Local Interconnect Network (LIN)
The operational field is differentiated as follows:
- The CAN-B links the control units of systems located in the vehicle interior (e.g. power windows, heated rear window).
- CAN-C networks the control units for the drive and chassis systems (e.g. engine, transmission control).
- The MOST links the control units of the audio and navigation systems via a fiber optic cable (if equipped e.g. the telephone, the voice control).
- The LIN bus is used where rather simple control and monitoring tasks are to be performed in the vehicle.
In respect of the interference immunity, e.g., electromagnetic effect or radiation, and the high data transfer rate, higher requirements are placed on the engine compartment CAN-C.
Controller Area Network (data bus/CAN bus) systems
The CAN bus systems are two-wire data bus systems. They differ from one another in terms of transfer rate depending on the requirement.
MOST bus
The MOST bus is an optical data bus system. Here the data are transferred via fiber optic cables to the connected control units for information, navigation, and communication systems.
LIN
The LIN bus is a single-wire data bus system. The LIN bus is used e.g. between the multifunction steering wheel and the steering column module.
Data exchange between the data bus systems
The radio, the radio control panel and navigation unit or the COMAND operating, display and controller unit forms the interface (Gateway) for data exchange the MOST and the CAN-B. The central gateway control unit is the interface for data interchange between the CAN-B and the CAN-C.
The steering column module, the instrument cluster and the EIS [EZS] control unit are connected both to the CAN-B and the CAN-C. However, they do not act as an interface (gateway) between the two data bus systems. The steering column module reads in the signals of the switch actuations on the steering column module and all the signals of the button actuations on the multifunction steering wheel (MFL) over the LIN bus and places these signals on the CAN-B. The steering angle at the steering wheel is sensed electronically via the steering angle sensor (N49). The signals of the steering angle are placed on CAN-C via the steering column module.
| Central gateway control unit, location/task | GF00.19-P-4100T | |
| Component description for CDI control unit | with engine 642 | GF07.16-P-6000T |
| with engine 646.8 | GF07.16-P-6000TE | |
| Model 211.0 with engine 629 | GF07.16-P-6000TG | |
| ME-SFI [ME] control unit, component description | With engine 271.9 | GF07.61-P-6000KE |
| with engine 272.943/944/964/972 Engine 273.960/962 |
GF07.61-P-6000V | |
| ETC control unit, location/task | Transmission 722.6 | GF27.19-P-4012G |
| VGS control unit, location/task | Transmission 722.9 | GF27.19-P-4013N |
| Electronic selector lever module control unit, location/task/design | Transmission 722.6 | GF27.19-P-5138P |
| Electronic selector lever module control unit, location/task | Transmission 722.9 | GF27.19-P-5140NT |
| DTR controller unit, location/task/function | With engine 271, 272, 646 With code 219 Distronic (DTR) |
GF30.30-P-3115K |
| AIRmatic with ADS control unit, location/task/function | With code 489 Airmatic (semi-active air suspension) | GF32.22-P-4200E |
| Rear axle level control system control unit, location/task | Model 211.2 Except code 489 Airmatic (semi-active air suspension) |
GF32.33-P-3300A |
| Tire pressure monitor control unit, component description | With code 475 Tire pressure monitor (Siemens) With code 470 Tire pressure monitor (base) With code 494 USA version |
GF40.15-P-5124TR |
| ESP control unit, component description | GF42.45-P-5118TM | |
| Upper control panel control unit, location/task/design/function | Model 211.0 | GF54.21-P-4105T |
| Model 211.2 | GF54.21-P-4105TS | |
| Driver-side SAM control unit with fuse and relay module, location/task/design | GF54.21-P-4109T | |
| Front passenger-side SAM control unit with fuse and relay module, location/task/design | GF54.21-P-4111T | |
| Lower control panel control unit, location/task/design/function | GF54.21-P-4116T | |
| Steering column module, location/task | GF54.21-P-4125T | |
| Rear SAM control unit with fuse and relay module, location/task | Model 211.0 | GF54.21-P-4130T |
| Model 211.2 | GF54.21-P-4130TA | |
| Instrument cluster, component description | GF54.30-P-6000TM | |
| PTS control unit, location/task | with code 220 Parktronic system (PTS) | GF54.65-P-4100T |
| Loading floor control unit, location/task | Model 211.2 With code 943 Automatically extendable main loading floor |
GF68.80-P-4001TA |
| Rear-end door control unit, location/task | Model 211.2 | GF68.80-P-4002TA |
| Driver front door control unit, location/task | GF72.29-P-4115T | |
| Passenger-side front door control unit, location/task | GF72.29-P-4116T | |
| Door control unit rear, location/task/function | GF72.29-P-4117T | |
| TLC [HDS] control unit, location/purpose | Model 211.0 With code 881 Remote trunk closing (RTC [HDFS]) |
GF80.20-P-4120T |
| Electronic ignition switch control unit, location/task | GF80.57-P-4120T | |
| Trailer recognition control unit, location/task | With code 550 Trailer hitch | GF82.10-P-2106T |
| Overhead control panel control unit, location/task/design | GF82.20-P-4110T | |
| TV tuner, component description | With code 863 Digital/analog TV tuner | GF82.60-P-3110TM |
| Digital TV tuner, component description | With code 865 TV tuner and code 498 Japan version |
GF82.60-P-3118TJA |
| Radio control panel, component description | With code 523 MB Audio 20 radio | GF82.60-P-3116TM |
| With code 510 Audio 20 with CD changer | GF82.60-P-3116TMA | |
| SDAR control unit, component description | With code 536 SIRIUS satellite radio and code 494 USA version | GF82.60-P-3200TXB |
| Media interface control unit, component description | With code 518 Media interface | GF82.60-P-5000TM |
| Radio/navigation unit, component description | With code 511 Audio 50 APS with DVD changer and code 525 MB Audio 50 APS radio. | GF82.61-P-4111TM |
| Sound system amplifier, component description | with code 810 Sound system | GF82.62-P-6003TM |
| Subwoofer amplifier, component description | with code 810 Sound system | GF82.62-P-3050TM |
| Digital Audio Broadcasting control unit, component description | With code 537 Digital radio and code 833 Great Britain version | GF82.62-P-5000TM |
| Communication control unit, component description | With code 527 COMAND APS with single DVD drive (with navigation) and code 498 Japan version |
GF82.70-P-5003TJA |
| COMAND operating, display and controller unit, component description | With code 512 COMAND APS with DVD changer, code 527 COMAND APS with single DVD drive (with navigation) except code 494 USA version and except code 498 Japan version With code 512 COMAND with DVD changer, code 528 COMAND with DVD changer and code 494 USA version |
GF82.85-P-3134TXB |
| With code 527 COMAND APS with single DVD drive (with navigation) and code 498 Japan version | GF82.85-P-3134TJA | |
| TELE AID control unit, location/task/design/function | With code 359 TELE AID emergency call system With code 494 USA version |
GF82.95-P-4100TMU |
| Control and operating unit for automatic air conditioning, location/task | Except code 581 Comfort automatic air conditioning | GF83.40-P-2180T |
| Comfort automatic air conditioning control and operating unit, location/task | with code 581 Comfort automatic air conditioning | GF83.40-P-2181TT |
| Stationary heater/heater booster control unit, location/task | with code 228 Stationary heater | GF83.70-P-4002T |
| Left front seat adjustment control unit with memory location/task | with code 275 Memory package (driver seat, steering column, mirrors) | GF91.29-P-2106T |
| Right front seat adjustment control unit, with memory location/task | with code 242 Electrically adjustable front passenger seat with memory with code 275 Memory package (driver seat, steering column, mirrors) |
GF91.29-P-2107T |
| Seat heater/seat ventilation control unit, location/task | with code 401 Front comfort seats, incl. seat heating and seat ventilation With code 872 Electric seat heater for left and right rear seat With code 443 Steering wheel heater |
GF91.30-P-3005T |
| Supplemental restraint systems control unit, location/task/design | GF91.60-P-4018T | |
| Overall network (GVN) function description table of contents | GF00.19-P-0999TMA |