GF00.19-P-0001LE Overall Network (GVN) Function

GF00.19-P-0001LE Overall Network (GVN) Function
- MODEL 216.3, 221.0 /1 as of model year 2009 /YoM 08

General overall network
The heightened requirements placed on vehicle electronics, e.g. in the following areas:
- Vehicle safety
- Comfort
- Communication
- Diagnosis
require networking of the existing systems in the vehicle so that the necessary information can be exchanged.
his 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 data bus systems are used.

The vehicle electronics are networked using the following data bus systems:
- Controller Area Network (CAN)
- Media Oriented System Transport (MOST)

CAN
The CAN is an electrical bus system for the transmission of data on 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 is transmitted digitally on 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
- Reduces number of electrical lines
- Improved electromagnetic compatibility (EMC)

The following CAN systems are involved in the overall network:
Telematics CAN (CAN A)
- Interior CAN (CAN B)
- Drive train CAN (CAN C)
- Diagnostic CAN (CAN D)
- Chassis CAN (CAN E)
- Central CAN (CAN F)
- Front end CAN (CAN G)
- Vehicle dynamics CAN (CAN H)
- Drive train sensor CAN (CAN I)
- Sensor CAN (CAN S)

Telematics CAN
The telematics CAN is used for data exchange between the attached audio components. The telematics CAN operates at a transfer rate of 125 kBit/s.

The following control units are subscribers to the telematics CAN:
- COMAND control unit
- DVD player (A40/4)
(model 221 with code (864) Rear Entertainment System)
- Left rear display (A40/5)
(model 221 with code (864) Rear entertainment system)
- Right rear display (A40/6)
(model 221 with code (864) Rear entertainment system)
- COMAND display (A40/8)
(without code (867) SPLITVIEW)
- Front central operating unit (A40/9)
- SPLITVIEW display (A40/10)
(with code (867) SPLITVIEW)
- TV combination tuner (analog/digital) (A90/1)
(with code (863) Digital/analog TV tuner)
- Rear air conditioning control unit (N22/4)
(Model 221 with code (582) Air conditioning in rear
- HBF control unit (N72/2)
(on model 221 with code (406) Multicontour seats in rear or with code (864) Rear entertainment system)

Gateway:
The COMAND control unit forms the interface for data exchange between telematics CAN and 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 125 kBit/s.

The following control units are subscribers to the interior CAN:
- STH control unit (A6n1)
(Model 216 with code (228) Stationary heater) or STH control unit or ZUH (A6n1)
(Model 221 with code (228) Stationary heater)
- Panoramic sliding roof control module (A98)
(Model 221.1 with code (413) Panoramic glass sunroof with top sliding sunroof )
- Multicontour seat pneumatic pump (M40)
(with code (409) Left/right front multicontour seats, model 221 with code (406) Rear multicontour seats)
- Pneumatic pump for dynamic seat control (M40/1)
(with code (432) Left and right dynamic multicontour seat)
- WSS control unit (weight sensing system) (N2/13)
(Model 221 with code (494) USA version up to 31.8.08)
- Front SAM control unit with fuse and relay module (N10/1)
- Rear SAM control unit with fuse and relay module (N10/2)
- AAC [KLA] control unit (N22/1)
- Rear control unit (N22/6)
(Model 216)
- Rear seat control unit (N25/6)
(Model 221 with code (223) Rear bench seat with electrically adjustable outer seats with PRE-SAFE- positioning function for outer seats and outer head restraints or with code (402) Rear head restraints including seat heater and seat ventilation or with code (872) Left and right electric seat heater for rear seat )
- Special vehicle multifunction control unit (MSS) (N26/9)
(Model 221 with code (965) Electrical equipment for rental cars)
- Special vehicle multifunction control unit (SVMCU [MSS]) (N26/14)
(Model 221.1 with code (Z07) Top protection, code (Z21) Fire extinguishing system, code (Z22) Panic alarm system (PAS [GAS]) or code (Z25) Emergency fresh air system incl. device carrier plate)
- Trailer recognition control unit (N28/1)
(Model 221 with code (550) Trailer hitch)
- Left front seat control unit (N32/1)
- Right front seat control unit (N32/2)
- Left front multicontour backrest control unit (N32/15)
(with code (409) Left/right front multicontour seats )
- Right front multicontour backrest control unit (N32/16)
(with code (409) Left/right front multicontour seats )
- Left front dynamic seat control unit (N32/19)
(with code (432) Left and right dynamic multicontour seat)
- Left rear multicontour backrest control unit (N32/20)
(Model 221 with code (406) Multicontour seats in rear)
- Right rear multicontour backrest control unit (N32/21)
(Model 221 with code (406) Multicontour seats in rear)
- Right front dynamic seat control unit (N32/22)
(with code (432) Left and right dynamic multicontour seat)
- PTS control unit (N62) (for model 221 with code (220) PARKTRONIC up to 31.5.09 on interior CAN, model 216 up to 31.8.10 on interior CAN)
- Reversing camera control unit (N66/2)
(with code (218) Reversing camera and code (498) Japan version)
- Left door control unit (N69/1)
(Model 216) or Left front door control unit (N69/1)
(Model 221)
- Right door control unit (N69/2)
(Model 216) or Right front door control unit (N69/2)
(Model 221)
- Left rear door control unit (N69/3)
(Model 221)
- Right rear door control unit (N69/4)
(Model 221)
- Keyless-Go control unit (N69/5)
(with code (889) Keyless-Go)
- Overhead control panel control unit (N70)
- Upper control panel control unit (N72/1)
- EZS control unit (N73)
- TPM [RDK] control unit (N88)
(up to 31.5.09 with code (475) Tire pressure monitor (Premium), Siemens company)
- Central gateway control unit (N93)
- Weight sensing system control unit (WSS) (N110)
(Model 216 with code (494) USA version, model 221 with code (494) USA version as of 1.9.08)
- TLC [HDS] control unit (N121)
(Model 221 with code (881) Remote trunk closing (RTC [HDFS]), model 216)

Gateway:
The central gateway control unit forms the interface for data exchange between the interior CAN and other bus systems.

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 use the drive train CAN:
- Intelligent servo module for DIRECT SELECT (A80)
- CDI control unit (N3/9)
(Model 221 with diesel engine)
- ME-SFI [ME] control unit (N3/10)
(on gasoline engine)
- ETC [EGS] control unit (N15/3)
(with transmission 722.6)
- Gear oil auxiliary pump control unit (N89)
(for model 221.095/195, model 221.074/174, model 216.374)
- Fuel system control unit (N118)
- Fully integrated transmission control unit (VGS) (Y3/8n4)
(with transmission 722.9)

Gateway:
The CDI control unit or ME-SFI control unit forms the interface for data exchange between the drive CAN and other bus systems.

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 subscribers to the diagnostic CAN:
- Central gateway control unit
- Emergency call system control unit (N123/4) (for code (359) TELE AID emergency call system)

Gateway:
The central gateway control unit forms the interface for data exchange between the diagnosis CAN and other bus systems.

Chassis CAN
The chassis CAN is used for data exchange between the connected control units of various systems.
The chassis CAN operates at a transfer rate of 500 kBit/s.

The following control units are chassis CAN subscribers:
- Multifunction camera (A40/11)
(Model 221 as of 1.6.09 or model 216 as of 1.9.10 with code (238) Active Lane Keeping Assist or code (476) Automatic Lane Recognition or code (513) Speed Limit Assist or with code (608) Adaptive Highbeam Assist)
- Left front reversible emergency tensioning retractor (A76)
(Model 221)
- Right front reversible emergency tensioning retractor (A76/1)
(Model 221)
- Electrohydraulic power steering (A91/1)
(for model 221.003/026/057/073/074/083/082/094/103/126/ 157/173/174/182/183/194, model 221.054/056/080/084/086/087/154/156/180/184/ 186/187 as of 1.6.09 model 221.070/170 as of 1.6.09 up to 31.8.10 without code (487) Active Body Control (ABC), model 221.070/170 as of 1.9.10, model 221.071/171 as of 1.6.09 without code (487) Active Body Control (ABC), model 221.095/195, model 216.373/394)
- Restraint systems control unit (N2/7)
- CDI control unit
- ME-SFI [ME] control unit
- Regenerative braking system control unit (N30/6)
(on model 221.095/195)
- ESP control unit (N47-5)
(except for model 221.095/195)
- AIRmatic with ADS control unit (N51)
(Model 221 without code (487) Active Body Control (ABC), model 216 with code (489) AIRmatic (air suspension with continuous adjustment damping))
- ABC control unit (N51/2)
(Model 221 with code (487) Active Body Control (ABC), model 216 without code (489) AIRmatic (air suspension with continuous adjustment damping))
- PTS control unit (N62)
(on model 221 with code (220) PARKTRONIC or code (230) Exclusive parking assist as of model 216 as of 1.9.10)
- Radar sensors control unit (SGR) (N62/1)
(with code (233) DISTRONIC PLUS up to 31.8.10 or with code (234) Blind Spot Assist or with code (239) Adaptive Cruise Control Plus Light)
- Video and radar sensor system control unit (N62/2)
(with code (233) DISTRONIC PLUS and code (237) Active Blind Spot Assist or code (238) Active Lane Keeping Assist)
- EZS control unit
- Steering column tube module (N80)
- TPM [RDK] control unit (N88) (as of 1.6.09 with code (475) Tire pressure monitor (Premium), Schrader company
- Central gateway control unit
- Night View Assist control unit (N101)
(Model 221 with code (610) Night View Assist as of 1.6.09, model 216 with code (610) Night View Assist as of 1.6.10)

Gateway:
The following control units form interfaces for the data exchange between the chassis CAN and other bus systems:
- CDI control unit or ME-SFI [ME] control unit
- Regenerative braking system control unit
- ESP control unit
- Central gateway control unit

Central CAN
The central CAN is used for data exchange between the connected control units. The central CAN operates at a transfer rate of 500 kBit/s.

The following control units are subscribers to the central CAN:
- Instrument cluster (A1)
- COMAND control unit
- Central gateway control unit

Gateway:
The following control units form interfaces for the data exchange between the central CAN and other bus systems:
- COMAND control unit
- Central gateway control unit

Front end CAN
The front end CAN is used for the data exchange of the attached control units with one another. The front end CAN operates at a transfer rate of 500 kBit/s.

The following control units are front end CAN subscribers:
- Electric parking brake controller unit (A13)
- Xenon headlamp control unit (E1n1, E2n1)
(Model 221 up to 31.5.09 with code (615) Bi-xenon headlamp unit with integrated curve illumination or code (616) Bi-xenon headlamp unit with integrated asymmetrical curve illumination, model 221 as of 1.9.09, model 216)
- Central gateway control unit

Gateway:
The central gateway control unit forms the interface for data exchange between the front end CAN and other bus systems.

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 subscribers to the vehicle dynamics CAN:
- DTR controller unit (A89)
(with code (219) Distronic (DTR), with code (233) DISTRONIC PLUS, with code (237) Active Blind Spot Assist or with code (239) Adaptive Cruise Control Plus Light)
- Yaw rate sensor for lateral and longitudinal acceleration (B24/15)
- Regenerative braking system control unit
(Model 221.095/195)
- ESP control unit
(Model 221 except 221.095/195, model 216)
- Radar sensors control unit (SGR)
(up to 31.8.10 with code (233) DISTRONIC PLUS or with code (234) Blind Spot Assist or with code (239) Adaptive Cruise Control Plus Light)
- Video and radar sensor system control unit
(for model 216, 221 (except 221.095/195) with code (233) DISTRONIC PLUS and code (237) Active Blind Spot Assist and code (238) Active Lane Keeping Assist)
- Night View Assist control unit
(on model 221 up to 31.5.09, model 216 up to 31.8.10 with code (610) Night View Assist)

Gateway:
The following control unit forms the interface for the data exchange between the vehicle dynamics CAN and other bus systems:
- Regenerative braking system control unit
(Model 221.095/195)
- ESP control unit
(Model 221 except 221.095/195, model 216)
- Radar sensors control unit
- Video and radar sensor system 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 subscribers to the drive train sensor CAN:
- Electric refrigerant compressor (A9/5)
(Model 221.095/195)
- CDI control unit
(Model 221 with engine 642.8)
- ME-SFI [ME] control unit
(Model 221.095/195)
- Left NOx sensor control unit (N37/5)
(Model 221 with engine 276.9, with engine with stratified-charge mode)
- Right NOx sensor control unit (N37/6)
(Model 221 with engine 276.9, with engine with stratified-charge mode)
- NOx sensor control unit downstream of diesel particulate filter (N37/7)
(Model 221 with engine 642.862/868 and code (U42) BlueTEC (SCR) diesel exhaust treatment)
- NOx sensor control unit downstream of SCR catalytic converter (N37/8)
(Model 221 with engine 642.862/868 and code (U42) BlueTEC (SCR) diesel exhaust treatment)
- Battery management system control unit (N82/2)
(Model 221.095/195)
- DC/DC converter control unit (N83/1)
(Model 221.095/195)
- AdBlue� control unit (N118/5)
(Model 221 with engine 642.862/868 with code (U42) BlueTEC (SCR) diesel exhaust treatment)
- Power electronics control unit (N129/1)
(Model 221.095/195)

Gateway:
The ME-SFI [ME] control unit or CDI control unit forms the interface for data exchange between the drive sensor CAN and other bus systems.

Sensor CAN (CAN S)
The sensor CAN is used for the data exchange of the attached control units with one another. The sensor CAN operates with a transfer rate of 500 kBit/s.

The following control units are subscribers to the sensor CAN:
- Front bumper, outer left radar sensor (A86/1b1)
(up to 31.8.10 with code 233) DISTRONIC PLUS)
- Front bumper, inner left radar sensor (A86/1b2)
(as of 1.9.10 with code (233) DISTRONIC PLUS or code (237) Active Blind Spot Assist)
- Front bumper, inner right radar sensor (A86/1b3)
(as of 1.9.10 with code (233) DISTRONIC PLUS or code (237) Active Blind Spot Assist)
- Front bumper, outer right radar sensor (A86/1b4)
(up to 31.8.10 with code 233) DISTRONIC PLUS)
- Rear bumper, outer right radar sensor (A86/2b1)
(as of 1.9.09 with code (234) Blind Spot Assist or code (237) Active Blind Spot Assist)
- Rear bumper, inner right radar sensor (A86/2b2)
(up to 31.8.09 with code (234) Blind Spot Assist)
- Rear bumper, inner left radar sensor (A86/2b3)
(up to 31.8.09 with code (234) Blind Spot Assist)
- Rear bumper, outer left radar sensor (A86/2b4)
(as of 1.9.09 with code (234) Blind Spot Assist or code (237) Active Blind Spot Assist)
- Radar sensors control unit (SGR)
(with code (233) DISTRONIC PLUS up to 31.8.10 or code (234) Blind Spot Assist)
- Video and radar sensor system control unit
(with code (233) DISTRONIC PLUS or code (237) Active Blind Spot Assist)

Gateway:
The radar sensors control unit (SGR) or the video and radar sensor system control unit forms the interface for data exchange between the sensor CAN and other bus systems.

MOST
MOST is an optical networking 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 subscribers to the MOST:
- Digital sound processor (A2/69)
(for model 221 with code (811) Advanced sound system)
- COMAND control unit
- TV combination tuner
(with code (863) Digital/analog TV tuner)
- Voice control system (VCS) (N41/3)
(up to 31.5.09 with code (813) Voice control system (VCS))
- Digital Audio Broadcasting control unit (N87/3)
(with code (537) Digital radio)
- SDAR control unit (N87/5)
(with code (536) SIRIUS satellite radio)
- High definition tuner control unit (N87/8)
(with code (517) HD radio)
- Audio tuner control unit (N93/1)
- UPCI control unit (universal portable cell phone interface) (N123/1)
(up to 31.5.09 with code (386) Preinstallation for portable cell phone, UPCI system or with code (389) Mobile phone preinstallation with universal interface USA/Canada)
- Media interface control unit (N125/1)
(with code (518) Media interface)

Gateway:
The COMAND control unit forms the interface for data exchange between MOST and other bus systems.