Overall network (GVN) function - GF00.19-P-0001RF
Model 205, 253
Overall network, general
The requirements placed on vehicle electronics, e.g. in the following areas, increase continuously:
- Vehicle safety
- Comfort
- Communication
- Diagnosis
This requires networking of the existing systems in the vehicle so that the necessary information can be exchanged.
This cannot be achieved using conventional data transfer since the amount of installation space is limited and a reduction of the weight of the vehicle is targeted. This is why bus systems are used.
The vehicle electronics are networked using the following bus systems:
- CAN
- Chassis FlexRay
- MOST
- Ethernet
CAN
The CAN is an electrical bus system for the transmission of data via two lines. The CAN consists of a twisted two-core data line that connects all CAN participants (control units) via a parallel connection. The two lines of the data line must not be swapped (low level, high level). Each connected control unit is able to transmit or receive data (bidirectional bus). The data are sent digitally over the CAN at various intervals. The individual data blocks are defined in a data protocol and it is specified which data are received or transmitted by a control unit. The sum of the data blocks, the short break between two transmission intervals and other properties of the CAN are checked constantly. Detected faults are stored and placed in the fault memory.
The CAN offers the following advantages:
- Data exchange between individual control units
- Provision of sensor signals for several systems
- Reduction of the number of electrical lines
- Improvement of the electromagnetic compatibility
The following CANs are involved in the overall network:
- Telematics CAN
- AMG CAN (with CODE 466 (Active engine mount), CODE 467 (Electronic differential lock))
- Interior CAN
- Engine CAN
- Drive train CAN
- Diagnostic CAN
- Vehicle dynamics CAN
- User interface CAN
- Drive train sensor CAN
- Hybrid CAN (model 205.012/047/147/212/247)
- Peripherals CAN
- Radar-CAN 1 (with CODE 23P (Driving Assistance package Plus))
- Radar-CAN 2 (with CODE 23P (Driving Assistance package Plus))
Telematics CAN
The telematics CAN is used for the data exchange of the attached audio components with one another. The telematics CAN operates at a transfer rate of 250 kBit/s.
The following control units are participants on the telematics CAN:
- Head unit
- Audio/COMAND display
- Audio/COMAND control panel
- Touchpad (model 205 with CODE 494 (USA version) or CODE 498 (Japan version), model 205 up to 31.05.2015 with CODE 522 (Audio 20 radio) or CODE 531 (COMAND APS), model 205 as of 01.06.2015, model 253 with CODE 448 (Touchpad))
Gateway:
The head unit forms the interface for data exchange between control units connected to other bus systems.
The following control units are connected to the Audio/COMAND control panel via LIN:
- Upper control panel control unit via lower control panel LIN
- Left lower control panel via telephone keypad LIN
- Right lower control panel via telephone keypad LIN
AMG CAN (with CODE 466 (Active engine mount), CODE 467 (Electronic differential lock))
The AMG CAN is used for the data exchange of the attached control units with one another. The AMG CAN operates at a transfer rate of 500 kbit/s.
The following control units are participants of the AMG CAN:
- Electronic differential control unit (with CODE 467 (Electronic differential lock))
- Active engine mount control unit (with CODE 466 (Active engine mount))
- AMG suspension control unit
Gateway:
The AMG suspension control unit forms the interface for data exchange between control units connected to other bus systems.
Interior CAN
The interior CAN is used for the data exchange of the attached control units with one another. The interior CAN operates at a transfer rate of 250 kbit/s.
The following control units are participants on the interior CAN:
- Panoramic sliding sunroof control unit (with CODE 413 (Panoramic sliding sunroof))
- Sliding roof control module (with CODE 414 (Sliding roof))
- Front SAM control unit
- Rear SAM control unit
- Climate control unit
- ATA [EDW]/tow-away protection/interior protection control unit (with CODE 551 (Anti-theft alarm system (ATA [EDW])) and CODE 882 (Interior monitoring))
- Special-purpose vehicle multifunction control unit (with CODE 965 (Taxi/rental vehicle preinstallation))
- Trailer recognition control unit (with CODE 550 (Trailer hitch))
- Driver seat control unit (with code (275) Memory package)
- Front passenger seat control unit (with CODE 242 (Electrically adjustable front passenger seat with memory))
- Camera cover control unit (with CODE 218 (Reversing camera) or CODE 501 (360° camera))
- Left front door control unit
- Right front door control unit
- Left rear door control unit (model 205.0/1/2.253)
- Right rear door control unit (model 205.0/1/2, 253)
- KEYLESS-GO control unit (with CODE 889 (KEYLESS-GO) or CODE 893 (KEYLESS-GO start function))
- Electronic ignition switch control unit
- Trunk lid control (KDS) control unit (with CODE 881 (Remote trunk closing))
- Liftgate control unit (with CODE 890 (EASY-PACK liftgate))
Gateway:
The electronic ignition lock control unit forms the interface for data exchange between control units connected to other bus systems. The following control units are connected to the A/C system control unit via LIN:
- Stationary heater control unit (with CODE 228 (Stationary heater)) over climate control LIN 2
- Electric A/C compressor (model 205.012/047/147/212/247) over the climate control LIN 2
- Rear climate control operating unit (with CODE 581 (Automatic A/C system)) over climate control LIN
- Front climate control operating unit via climate control LIN
The following control units are connected to the rear SAM control unit via heater LIN:
- Front passenger seat heater control unit (with CODE 401 (Seat climate control for driver and front passenger) or CODE 873 (Seat heater for driver and front passenger) and except CODE 242 (Electrically adjustable front passenger seat with memory function) and except CODE 222 (Electrically adjustable right front seat))
- Driver seat heater control unit (with CODE 401 (Seat climate control for driver and front passenger) or CODE 873 (Seat heater for driver and front passenger) and except CODE 275 (Memory package) and except CODE 221 (Electrically adjustable left driver's seat))
- Rear seat heater control unit (with CODE 872 (Seat heater in rear))
- Driver's seat control unit (with CODE 221 (Electrically adjustable left driver's seat))
- Front passenger seat control unit (with CODE 222 (Electrically adjustable right front seat))
The following control units are connected to the front SAM control unit via LIN:
- Rain/light sensor with additional function via rain/light sensor LIN
- Overhead control panel control unit over roof LIN
Engine CAN
The engine CAN is used for the data exchange of the connected control units with one another. The engine CAN operates at a transfer rate of 500 kBit/s.
The following control units are participants of the engine CAN:
- CDI control unit or ME-SFI [ME] control unit
- Drivetrain control unit
Gateway:
The following control units form the interfaces for data exchange between control units connected to other bus systems:
- CDI control unit or ME-SFI [ME] control unit
- Drivetrain control unit
Drive train CAN
The drive train CAN is used for the data exchange of the attached control units with one another. The drive train CAN operates at a transfer rate of 500 kBit/s.
The following control units are participants on the drive train CAN:
- Intelligent servo module for DIRECT SELECT (transmission 722)
- CDI control unit or ME-SFI [ME] control unit
- AMG suspension control unit (with CODE 466 (Active engine mount), CODE 467 (Electronic differential lock))
- Automatic transmission fluid auxiliary oil pump control unit (transmission 722.9 (except 722.930))
- Fuel pump control unit
- Drivetrain control unit
- Fully integrated transmission control unit (with transmission 722, 724, 725)
Gateway:
The following control units form the interfaces for data exchange between control units connected to other bus systems:
- CDI control unit or ME-SFI [ME] control unit
- AMG suspension control unit (with CODE 466 (Active engine mount), CODE 467 (Electronic differential lock))
- Drivetrain control unit
Diagnostic CAN
The diagnostic CAN is used for the data exchange of the external diagnostic tester with the control units in the vehicle. The diagnostic CAN operates at a transfer rate of 500 kBit/s.
The following control units are participants on the diagnostic CAN:
- Electronic ignition switch control unit
- Telematics services communications module (with CODE 06U (Mercedes connect me basic services) or CODE 350 (Ecall Europe emergency call system) or CODE B54 (Live Traffic Information) or CODE B57 (COM module battery level))
- Emergency call system control unit (with code 348 (Emergency call/assist system))
Gateway:
The electronic ignition lock control unit forms the interface for data exchange between control units connected to other bus systems. The Weight Sensing System (WSS) control unit (with CODE U10 (Automatic front passenger airbag shutoff)) is connected over the seat occupancy LIN to the emergency call system control unit (with CODE 348 (Emergency call/Assist system)).
Vehicle dynamics CAN
The vehicle dynamics CAN is used for the data exchange of the attached control units with one another. The vehicle dynamics CAN operates at a transfer rate of 500 kBit/s.
The following control units are participants on the vehicle dynamics CAN:
- Supplemental restraint system control unit
- AMG suspension control unit (with CODE 466 (Active engine mount), CODE 467 (Electronic differential lock))
- Electronic Stability Program control unit
Gateway:
The following control units form the interfaces for data exchange between control units connected to other bus systems:
- AMG suspension control unit (with CODE 466 (Active engine mount), CODE 467 (Electronic differential lock))
- Electronic Stability Program control unit
The weight sensing system (WSS) control unit (with CODE U10 (Automatic front passenger airbag shutoff)) is connected via the seat occupancy LIN to the supplemental restraint system control unit.
User interface CAN
The user interface CAN is used for the data exchange of the attached control units with one another. The user interface CAN operates at a transfer rate of 500 kBit/s.
The following control units are participants of the user interface CAN:
- Instrument cluster
- Head unit
- Head-up-display (with CODE 463 (Head-up display))
- Left front reversible emergency tensioning retractor (with CODE 299 (PRE-SAFE® system))
- Right front reversible emergency tensioning retractor (with CODE 299 (PRE-SAFE® system))
- Reversing camera (with CODE 218 (Reversing camera))
- Supplemental restraint system control unit
- AMG suspension control unit (with CODE 466 (Active engine mount), CODE 467 (Electronic differential lock))
- Electronic ignition switch control unit
- Tire pressure monitor control unit (with CODE 475 (Tire pressure monitor))
- 360° camera control unit (with CODE 501 (360° camera))
Gateway:
The following control units form the interfaces for data exchange between control units connected to other bus systems:
- Head unit
- AMG suspension control unit (with CODE 466 (Active engine mount), CODE 467 (Electronic differential lock))
- Electronic ignition switch control unit
Drive train sensor CAN
The drive train sensor CAN is used for the data exchange of the attached control units with one another. The drive train sensor CAN operates at a transfer rate of 500 kBit/s.
The following control units are participants on the drive train sensor CAN:
- CDI control unit or ME-SFI [ME] control unit
- Catalytic converter heater control unit (model 205 (except 205.012/212) with ENGINE 651.9 and CODE 494 (USA version))
- NOx sensor control unit (engine 274.9 with CODE 920 (Gasoline direct injection with stratified charge))
- NOx sensor control unit downstream of diesel particulate filter (engine 651.921)
- NOx sensor control unit downstream of SCR catalytic converter (engine 651.921)
- Soot particulate sensor control unit (engine 651.9 with CODE U77 (BLUETEC (SCR) diesel exhaust treatment) and CODE 494 (USA version) except model 205.012/047/147/212/247)
- AdBlue® control unit (engine 651.921)
Gateway:
The CDI control unit or the ME-SFI [ME] control unit forms the interface for data exchange between control unit connected to other bus systems.
Hybrid CAN (model 205.012/047/147/212/247)
The hybrid CAN is used for the data exchange of the connected control units with one another. The hybrid CAN operates at a transfer rate of 500 kBit/s.
The following control units are subscribers to the hybrid CAN:
- Battery management system control unit
- Charger (model 205.047/147/247)
- Telematics services communications module (with CODE 06U (Mercedes connect me basic services) or CODE 350 (Ecall Europe emergency call system) or CODE B54 (Live Traffic Information) or CODE B57 (COM module battery level))
- Drivetrain control unit
- Power electronics control unit
Gateway:
The following control units form the interfaces for data exchange between control units connected to other bus systems:
- Drivetrain control unit
- Telematics services communications module (with CODE 06U (Mercedes connect me basic services) or CODE 350 (Ecall Europe emergency call system) or CODE B54 (Live Traffic Information) or CODE B57 (COM module battery level))
Peripherals CAN
The periphery CAN is used for the data exchange of the attached control units with one another. The periphery CAN operates at a transfer rate of 500 kBit/s.
The following control units are participants of the periphery CAN:
- Mono multifunction camera (with CODE 513 (Traffic Sign Assist), CODE 640 (High Performance LED) or CODE 641 (Dynamic left-hand traffic LED headlamp) or CODE 642 (Dynamic right-hand traffic LED headlamp) or CODE 22P (Lane package))
- COLLISION PREVENTION ASSIST controller unit (with CODE 258 (Collision Prevention Assist))
- Integrated outer right rear bumper radar sensor (with CODE 234 (Blind Spot Assist))
- Integrated outer left rear bumper radar sensor (with CODE 234 (Blind Spot Assist))
- Left headlamp control unit (with CODE 631 (Static left-hand traffic LED headlamp) or CODE 632 (Static right-hand traffic LED headlamp) or CODE 640 (High-performance LED) or CODE 641 (DYNAMIC LEFT-HAND TRAFFIC LED HEADLAMP) or CODE 642 (DYNAMIC RIGHT-HAND TRAFFIC LED HEADLAMP))
- Right headlamp control unit (with CODE 631 (Static left-hand traffic LED headlamp) or CODE 632 (Static right-hand traffic LED headlamp) or CODE 640 (High-performance LED) or CODE 641 (DYNAMIC LEFT-HAND TRAFFIC LED HEADLAMP) or CODE 642 (DYNAMIC RIGHT-HAND TRAFFIC LED HEADLAMP))
- Electronic ignition switch control unit
- Drivetrain control unit
- Electric parking brake control unit (model 205.086/087/286/287)
Gateway:
The following control units form the interfaces for data exchange between control units connected to other bus systems:
- Electronic ignition switch control unit
- Drivetrain control unit
The left front actuation module, LED exterior lighting (with CODE 640 (High Performance LED or CODE 641 (DYNAMIC LEFT-HAND TRAFFIC LED HEADLAMP) or CODE 642 (DYNAMIC RIGHT-HAND TRAFFIC LED HEADLAMP)) is connected to the left headlamp control unit over the left headlamp LIN.
The right front actuation module, LED exterior lighting (with CODE 640 (High Performance LED) or CODE 641 (DYNAMIC LEFT-HAND TRAFFIC LED HEADLAMP) or CODE 642 (DYNAMIC RIGHT-HAND TRAFFIC LED HEADLAMP)) is connected to the right headlamp control unit over the right headlamp LIN.
Radar-CAN 1 (with CODE 23P (Driving Assistance package Plus))
Radar CAN 1 is used for exchanging data between the connected control units. Radar CAN 1 operates at a transfer rate of 500 kBit/s. The following control units use radar CAN 1:
- Left front bumper radar sensor
- Right front bumper radar sensor
- Radar sensors control unit
Gateway:
The radar sensors control unit forms the interface for data exchange between control units connected to other bus systems.
Radar-CAN 2 (with CODE 23P (Driving Assistance package Plus))
Radar CAN 2 is used for the data exchange of the attached control units with one another. Radar CAN 2 operates at a transfer rate of 500 kBit/s.
The following control units are participants of radar CAN 2:
- Center rear bumper radar sensor
- Right outer rear bumper radar sensor
- Left outer rear bumper radar sensor
- Radar sensors control unit
Gateway:
The radar sensors control unit forms the interface for data exchange between control units connected to other bus systems.
Chassis FlexRay
The chassis FlexRay is a quick, deterministic and fault-tolerant bus system. Signals are not transmitted based on an event but during fixed defined time windows. As a result, the bus load can be reduced. The time windows are divided into static and dynamic sections.
The chassis FlexRay consists of a twisted two-core data line that transmits differential signals in order to improve the interference resistance. Each connected control unit is able to transmit or receive data in the form of voltage pulses.
The chassis FlexRay is used for the data exchange of the attached control units with one another. The chassis FlexRay operates at a transfer rate of up to 10 MBit/s.
The following control units are participants of the chassis FlexRay:
- Stereo multifunction camera (with CODE 513 (Traffic Sign Assist), CODE 640 (High Performance LED) or CODE 641 (Dynamic left-hand traffic LED headlamp) or CODE 642 (Dynamic right-hand traffic LED headlamp) or CODE 23P (Driving assistance package Plus)
- DISTRONIC electric controller unit (with code (239) DISTRONIC PLUS)
- Front long-range radar sensor (with CODE 23P (Driving assistance package Plus))
- Electronic Stability Program control unit
- AIRmatic control unit (model 205 with CODE 483 (ADVANCED AGILITY package) and CODE 489 (AIRmatic))
- AIR BODY CONTROL control unit (model 253 with CODE 489 (AIR BODY CONTROL))
- Adaptive damping system control unit (with CODE 488 (Steel/air suspension) or CODE 492 (AMG Performance suspension))
- Parking system control unit (with CODE 235 (Active Parking Assist))
- Radar sensors control unit (with CODE 23P (Driving assistance package Plus))
- Electrical power steering control unit
- Electronic ignition switch control unit
- Steering column module control unit
- Drivetrain control unit
Gateway:
The following control units form the interfaces for data exchange between control units connected to other bus systems:
- Electronic Stability Program control unit
- Radar sensors control unit
- Electronic ignition switch control unit
- Drivetrain control unit
MOST
The MOST is an optical bus system. Here, data are transferred via fiber optic cable to the connected information, navigation, and communication components. The MOST operates with a transfer rate of 22 Mbits/s.
The following control units are participants on the MOST:
- Head unit
- Tuner unit (with CODE 536 (SIRIUS satellite radio) or CODE 537 (Digital radio (DAB)) or CODE 865 (TV tuner))
- Sound system amplifier control unit (with CODE 810 (Sound system))
Gateway:
The head unit forms the interface for data exchange between control units connected to other bus systems.
Ethernet
The Ethernet vehicle access is used for data transfer to the head unit. The Ethernet vehicle access operates at a transfer rate of 100 MBit/s.
The band width of 100 MBit/s permits e.g. programming the Digital Owner's Manual, the head unit and the MOST components without a separate DVD.
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