Overall network (GVN) function - GF00.19-P-0001SXE
MODEL 216.3, 221.0 /1
Illustrated on model 221.0
Overall network
The further development of the driver information system as well as the roll-out of video-based, driver-supported systems (backup camera, ambient sensor technology, etc.), are reflected in the requirements placed on the data bus systems.
A data bus is a data collection line, the data of which can be used by all the control units connected.
Function
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. However, the data flow must be controlled using an access procedure (log) if all control units utilize a common bus line.
When transferring data within a Controller Area Network (CAN bus), the connected control units are not addressed, but rather the content of a message (e.g. RPM or engine temperature) is marked by a unique identifier.
With the subsequent acceptance filtering, all control units - upon correct reception of the message - use the identifier to determine whether the data are relevant for them or not.
Overall network
Basically, the following data bus systems are involved in the networking:
- Telematics CAN
- Interior CAN
- Drive train CAN
- Diagnostic CAN
- Chassis CAN
- Central CAN
- Front end CAN
- Vehicle dynamics CAN
- Media Oriented System Transport (MOST)
Distinguishing features
- The telematics CAN is responsible for telecommunication data transfer. It networks the COMAND controller unit with the control units for the rear functions. The telematics CAN operates at a transfer rate of 125 kBit/s.
- The interior CAN is responsible for data transfer 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 system etc.). The interior CAN operates at a transfer rate of 125 kBit/s.
- The drive train CAN is responsible for data transfer for the drive systems. The drive train CAN operates at a transfer rate of 500 kBit/s.
- The diagnostic CAN is responsible for transferring the diagnostic data to STAR DIAGNOSIS and for connecting the emergency call system control unit. The diagnostics CAN operates at a transfer rate of 500 kBit/s.
- The chassis CAN is responsible for data transfer between the chassis systems. The chassis CAN operates at a transfer rate of 500 kBit/s.
- The central CAN is primarily responsible for data transfer between the COMAND controller unit (telematics CAN, MOST) and the central gateway control unit. The central CAN operates at a transfer rate of 500 kBit/s.
- The front end CAN is responsible for data transfer between the Xenon headlamp control units, electric parking brake control unit to the central gateway control unit. The front end CAN operates at a transfer rate of 500 kBit/s.
- The vehicle dynamics CAN is responsible for data transfer from driving safety systems (e.g. Distronic, Night View Assist, rotational speed etc.). The vehicle dynamics CAN operates at a transfer rate of 500 kBit/s.
The telematics CAN interconnects the following control units:
- COMAND controller unit
- Left rear display
- Right rear display
- COMAND display
- Front central operating unit
- TV combination tuner
- Rear AC control unit
- Audio/video controller control unit
- RCP [HBF] control unit
The following control units are connected to each other over the interior CAN:
- STH control unit
- Lumbar pump
- Multicontour seat pneumatic pump
- Pneumatic pump for dynamic seat control
- WSS (Weight Sensing System) control unit
- Front SAM control unit with fuse and relay module
- Rear SAM control unit with fuse and relay module
- AAC [KLA] control unit
- Rear control unit (N22/6) (model 216)
- Rear seats control unit
- Special vehicle multifunction control module (SVMCM)
- Trailer recognition control unit
- Left front seat control unit
- Right front seat control unit
- Left front multicontour backrest control unit
- Right front multicontour backrest control unit
- Left front dynamic seat control unit
- Right front dynamic seat control unit
- Left rear multicontour backrest control unit
- Right rear multicontour backrest control unit
- PTS control unit
- Backup camera control unit
- Door control module left
- Door control module front left
- Door control module right
- Door control module front right
- Door control module rear left
- Door control module rear right
- Keyless Go control unit
- Overhead control panel control unit
- Upper control panel control unit
- EIS [EZS] control unit
- TPM [RDK] control unit
- Central gateway control unit
- Weight Sensing System (WSS) control unit (N110) (model 216)
- WSS (Weight Sensing System) control unit
- TLC [HDS] control unit
The following control units are connected to each other over the drive train CAN:
- Intelligent servo module for DIRECT SELECT
- CDI control unit
- ME-SFI [ME] control unit
- ETC [EGS] control unit
- Fuel pump control unit
- Fully integrated transmission control (VGS) control unit
The following control units are connected to each other over the diagnostics CAN:
- Central gateway control unit
- Emergency call system control unit
The following control units are connected to each other over the chassis CAN:
- Left front reversible emergency tensioning retractor
- Right front reversible emergency tensioning retractor
- Restraint systems control unit
- CDI control unit
- ME-SFI [ME] control unit
- ESP control unit
- AIRmatic with ADS control unit
- ABC control unit
- Radar sensors control unit (SGR)
- EIS [EZS] control unit
- Steering column module
- Vehicle power supply control module
- Central gateway control unit
The following control units are connected to each other over the central CAN:
- Instrument cluster
- COMAND controller unit
- Central gateway control unit
The following control units are connected to each other over the front end CAN:
- Electric parking brake controller unit
- Xenon headlamp control units
- Central gateway control unit
The following control units are connected to each other over the vehicle dynamics CAN:
- DTR controller unit
- Yaw rate, lateral and longitudinal acceleration sensor
- ESP control unit
- Radar seniors control unit (SGR)
- Night vision assist control unit
The MOST interconnects the following control units:
- COMAND controller unit
- TV combination tuner
- Voice control system (VCS [SBS]) control unit
- SDAR control unit
- Audio tuner control unit
- UPCI control unit
Data transfer between the bus systems
The following control units form the interface between the bus systems:
- The central gateway control unit connects the interior CAN, diagnostic CAN, chassis CAN, central CAN and the front end CAN
- The COMAND controller unit connects the telematics CAN, central CAN and the MOST
- The TV combination tuner connects the telematics CAN with the MOST
- The ESP control unit and the Radar sensors control unit connect the chassis CAN with the vehicle dynamics CAN
- The CDI control unit or the ME-SFI [ME] control unit connects the drive train CAN with the chassis CAN
| Overall network (GVN), networking of components | GF00.19-P-0001-02SXE | |
| Instrument cluster, component description | A1 | GF54.30-P-6000SX |
| Electric parking brake controller unit, component description | A13 | GF42.20-P-5000SX |
| COMAND controller unit, component description | A40/3 Vehicles without code (498) Japan version and without code (494) USA version |
GF82.85-P-3136SX |
| Vehicles with code (494) USA version | GF82.85-P-3136SXU | |
| Vehicles with code (498) Japan version | GF82.85-P-3136SXJ | |
| Cockpit central display, component description | A40/8 | GF54.30-P-6100SX |
| Front central operating unit, component description | A40/9 | GF54.21-P-4500SX |
| Intelligent servo module (ISM) component description | A80 | |
| Vehicles with transmission 722.6 | GF27.19-P-4015SXA | |
| TV tuner, component description | A90/1 Vehicles with code (863) Digital/analog TV tuner |
GF82.60-P-3110SX |
| Yaw rate and lateral acceleration sensor, component description | B24/15 | GF42.45-P-5120SX |
| Xenon headlamp control unit component description | E1n1, E2n1 Model 221 with code (615) Bi-xenon headlamp unit with integrated curve illumination or model 216 |
GF82.10-P-2114SXA |
| Lumbar pump, component description | M25/1 Vehicles without code (409) Left/right front multicontour seats andwithout code (432) Left and right dynamic multicontour seat |
GF91.29-P-5260SX |
| Multicontour seat pneumatic pump (MCS), component description | M40 Vehicles with code (409) Left/right front multicontour seats and model 221 with code (406) Rear multicontour seat |
GF91.25-P-5205SX |
| Pneumatic pump for dynamic seat, component description | M40/1 Vehicles with code (432) Left and right dynamic multicontour seat |
GF91.25-P-5204SX |
| Restraint systems control unit, component description | N2/7 | GF91.60-P-4048SX |
| WSS (Weight Sensing System) control unit, component description | N110 Model 216 with code (494) USA version |
GF91.60-P-4046SCU |
| Driver-side SAM control unit with fuse and relay module, component description | N10/1 | GF54.21-P-6010SX |
| Rear SAM control unit with fuse and relay module, component description | N10/2 | GF54.21-P-6030SX |
| ETC [EGS] control unit, component description | N15/3 Vehicles with transmission 722.6 |
GF27.19-P-4018G |
| Automatic air conditioning control unit component description | N22/1 | GF83.40-P-3012SX |
| Rear control unit, component description | N22/6 Model 216 |
GF54.21-P-4134SC |
| Left front seat control unit, component description | N32/1 | GF91.29-P-5230SX |
| Right front seat control unit, component description | N32/2 | GF91.29-P-5240SX |
| Multicontour seat control unit (MCS), component description | N32/15, N32/16 Vehicles with code (409) Left/right front multicontour seats |
GF91.25-P-5201SX |
| N32/20, N32/21 Model 221 with code (406) Rear multicontour seat |
GF91.25-P-5201SXA | |
| Dynamic seat control unit, component description | N32/19, N32/22 Vehicles with code (432) Left and right dynamic multicontour seat |
GF91.25-P-5202SX |
| ESP control unit, component description | N47-5 | GF42.45-P-5118SX |
| Parktronic system (PTS) control unit, component description | N62 Vehicles with code (220) Parktronic System (PTS) |
GF54.65-P-5000SX |
| Component description for radar sensors control unit | N62/1 Vehicles with code (233) Distronic Plus |
GF30.30-P-3301SX |
| Backup camera control unit component description | N66/2 Vehicles with code (218) Backup camera |
GF54.65-P-5030SX |
| Driver-side front door control unit, component description | N69/1 Model 216 |
GF72.29-P-6000SC |
| Passenger-side front door control unit, component description | N69/2 Model 216 |
GF72.29-P-6010SC |
| Keyless Go control unit, component description | N69/5 Vehicles with Keyless-Go code 889: |
GF80.61-P-4200SX |
| Overhead control panel control unit, component description | N70 | GF82.20-P-5216SX |
| Upper control panel control unit, component description | N72/1 | GF54.21-P-6040SX |
| Electronic ignition/starter switch control unit (EIS), component description | N73 | GF80.57-P-6000SX |
| Steering column module, component description | N80 | GF54.21-P-6050SX |
| Vehicle power supply control unit, component description | N82/1 | GF54.21-P-4126SX |
| Tire pressure monitor control unit, component description | N88 Vehicles with code (475) Tire pressure monitor (Siemens) or with code (470) Tire pressure monitor (standard) or model 216 with code (494) USA version |
GF40.15-P-5124SX |
| Central gateway control unit, component description | N93 | GF54.21-P-4170SX |
| Audio tuner control unit, component description | N93/1 Vehicles without code (810) Sound system and without code (494) USA version and without code (498) Japan version |
GF82.62-P-3132SX |
| Vehicles with code (810) Sound system or code (494) USA version or code (498) Japan version | GF82.62-P-3132SXS | |
| Night vision assist control unit, component description | N101 Vehicles with code (610) Night View Assist |
GF54.30-P-6200SX |
| TLC control unit, component description | N121 Vehicles with code (881) remote trunk closing (RTC) |
GF80.20-P-6000SX |
| Universal Cell phone Interface (UPCI [UHI]) control unit, component description | N123/1 Model 216 with code (494) USA version Model 216 with code (386) Preinstallation for telephone "Handy", UPCI system Model 216 with code (388) Telephone "Handy", UPCI system |
GF82.70-P-5101SX |
| Emergency call system control unit, component description | Model 216 with code (494) USA version | GF82.95-P-3212SXR |