Overall network (GVN) function - GF00.19-P-0001TM
MODEL 211.0/2 as of 1.6.06 except CODE (494) USA version except CODE (498) Japan version
MODEL 211.0/2 as of 1.7.06 with CODE (494) USA version with CODE (498) Japan version
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 with code (527) COMAND APS with single DVD drive (with navigation), 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:
- CAN-B
- CAN-C
- MOST
- 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.
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
Depending on the equipment, the radio or the audio gateway control unit is the interface (gateway) for data exchange between 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 with the CAN B as well as with 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 | |
| CDI control unit component description | 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 engines 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 (standard) with CODE (494) USA version |
GF40.15-P-5124TR |
| Description of components in ESP control unit | 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 paneling 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 squib, 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 device | 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 |
| Radio control panel, location/task/design/function | GF82.60-P-3115TC | |
| Radio and navigation unit, location/task/design/function | With CODE (525) MB Audio 50 APS radio | GF82.61-P-4109T |
| Audio gateway control unit, location/task/design/function | except code (529) HIGH Class Japan | GF82.62-P-3102T |
| With code (529) HIGH Class Japan | GGF82.62-P-3102TJ | |
| CD player with changer component description | except code (494) USA version, except code (498) Japan version with CODE (494) USA version |
GF82.64-P-3112TM |
| CD player with changer, location/task/design/function | With code (529) HIGH Class Japan | GF82.64-P-3113TJ |
| Voice control system control unit, location/task | With code (813) Voice control system (VCS) with code (530) COMAND APS USA (with navigation) |
GF82.70-P-4113T |
| Universal Portable CTEL Interface (UPCI [UHI]) control unit, location/task | With code (388) Telephone "Handy", UPCI system With code (387) Preinstallation for telephone "Handy", UPCI system, USA/Canada With code (386) Preinstallation for telephone "Handy", UPCI system |
GF82.70-P-5100T |
| Navigation processor, component description | With code (527) COMAND APS with Single DVD disk drive (with navigation) with code (530) COMAND APS USA (with navigation) |
GF82.85-P-3132TM |
| Satellite radio, component description | With CODE (536) SIRIUS satellite radio | GF82.85-P-3105TMU |
| Operating and display unit with control unit, component description | With code (527) COMAND APS with Single DVD disk drive (with navigation) | GF82.85-P-3133TM |
| With code (530) COMAND APS USA (with navigation) | GF82.85-P-3133TMU | |
| Operating-display unit with control unit, location/task/design/function | With code (529) HIGH Class Japan | GF82.85-P-3114TJ |
| TELE AID control unit/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 |
| Heated seats/seat ventilation control unit, location/task | With code (401) Front deluxe seats, incl. seat heating and seat ventilation with CODE (872) Electric seat heater left and right rear seats With code (443) steering wheel heater |
GF91.30-P-3005T |
| Supplemental restraint systems control unit, location/task/design | GF91.60-P-4018T |