Mercedes Benz 169 - 245 Network of Control Units

· 1 Instrument cluster
· 2 COMAND operating, display and controller unit (with code (512) COMAND APS with DVD changer)
· 3 Restraint systems control unit
· 4 SAM control unit
· 5 Comfort AAC control and operating unit (with code (581) Comfort automatic air conditioning)
· 6 ATA [EDW]/tow-away protection/interior protection control unit (with code (551) Antitheft alarm system (ATA [EDW])
· 7 Trailer control unit (with code (550) Trailer hitch)
· 8 PTS control unit (with code (235) Active Park Assist)
· 9 Left front door control unit
· 10 Right front door control unit
· 11 Left rear door control unit (with code (584) Rear power windows (2 doors))
· 12 Right rear door control unit (with code (584) Rear power windows (2 doors))
· 13 Overhead control panel control unit (networked version)
· 14 EZS control unit
· 15 Steering column tube module
· 1 Instrument cluster
· 14 EZS control unit
· 15 Steering column module
· 16 CDI control unit (diesel engines)
· 17 ME-SFI [ME] control unit (gasoline engines)
· 20 Electronic selector lever module control unit (with transmission 722)
· 21 CVT control unit (with transmission 722)
· 22 ESP and BAS control unit
· 23 Electrical power steering (ES) control unit
· 2 COMAND operating, display and controller unit (with code (512) COMAND APS with DVD changer)
· 25 Digital TV tuner (with code (865) TV tuner) or Digital Audio Broadcasting control unit (with code (537) Digital radio)
· 26 Amplifier for sound system (with code (810) Sound system)
· 27 Media interface control unit (with code (518) Media interface) Sensor CAN
· 22 ESP and BAS control unit
· 24 Yaw rate sensor for lateral and longitudinal acceleration
· 14 EZS control unit
· 4 SAM control unit
· 5 Comfort AAC control and operating unit (with code (581) Comfort automatic air conditioning)
· 14 EZS control unit
· 16 CDI control unit (diesel engines)
· 17 ME-SFI [ME] control unit (gasoline engines)
· 18 Xenon headlamp control unit (with code (614) Bi-xenon headlamp unit)
· 19 Xenon headlamp control unit (with code (614) Bi-xenon headlamp unit)
· 28 Electric steering lock control unit
· 29 Upper control panel control unit
· 1 Instrument cluster
· 2 COMAND operating, display and controller unit (with code (512) COMAND APS with DVD changer)
· 3 Electronic compass (with code (245) Electronic compass)
· 4 Restraint systems control unit
· 5 SAM control unit
· 6 Comfort AAC control and operating unit (with code (581) Comfort automatic air conditioning)
· 7 ATA [EDW]/tow-away protection/interior protection control unit (with code (551) Antitheft alarm system (ATA [EDW])
· 8 Trailer control unit (with code (550) Trailer hitch)
· 9 PTS control unit (with code (235) Active Park Assist)
· 10 Left front door control unit
· 11 Right front door control unit
· 12 Left rear door control unit (with code (584) Rear power windows (2 doors))
· 13 Right rear door control unit (with code (584) Rear power windows (2 doors))
· 14 Overhead control panel control unit (networked version)
· 15 EZS control unit
· 16 Steering column tube module
· 1 Instrument cluster
· 15 EZS control unit
· 16 Steering column module
· 17 CDI control unit (diesel engines)
· 18 ME-SFI [ME] control unit (gasoline engines)
· 19 Xenon headlamp control unit (with code (614) Bi-xenon headlamp unit)
· 20 Xenon headlamp control unit (with code (614) Bi-xenon headlamp unit)
· 21 Electronic selector lever module control unit (with transmission 722)
· 22 CVT control unit (with transmission 722)
· 23 ESP and BAS control unit
· 24 Electrical power steering (ES) control unit
· 2 COMAND operating, display and controller unit (with code (512) COMAND APS with DVD changer)
· 26 Digital TV tuner (with code (865) TV tuner) or Digital Audio Broadcasting control unit (with code (537) Digital radio) or SDAR control unit (with code (536) SIRIUS satellite radio)
· 27 Amplifier for sound system (with code (810) Sound system)
· 28 Media interface control unit (with code (518) Media interface)
· 23 ESP and BAS control unit
· 25 Yaw rate sensor for lateral and longitudinal acceleration
· 15 EZS control unit
· 5 SAM control unit
· 6 Comfort AAC control and operating unit (with code (581) Comfort automatic air conditioning)
· 15 EZS control unit
· 17 CDI control unit (diesel engines)
· 18 ME-SFI [ME] control unit (gasoline engines)
· 29 Electric steering lock control unit
· 30 Upper control panel control unit
Model series 169 and 245 without code (B01) ECO start/stop function
The goal of on-board electrical system management is to assure a positive charge balance in the battery so that the vehicle can be started at any time.
The load state of the on-board electrical system is compared against defined characteristics and suitable measures are implemented where necessary.
These include, for example:
• Different charging voltage specifications for the alternator
• Rpm increases during engine idle
• Reduction of the output of individual convenience consumers.
To allow the vehicle to remain idle for long periods, the load on the battery from the quiescent current must be as low as possible. In addition to the optimization of individual components, two other measures have been introduced: decentralized power management and a quiescent current switch.
Decentralized power management is integrated into all control units as a standard software module and prevents undesirable control unit activity when the vehicle is parked. The quiescent current switch is a bi-stable relay that is opened by the on-board electrical system management when the vehicle is idle and the run-on time has elapsed. All control units that are not needed when the vehicle is idle are disconnected from the battery. This further minimizes the quiescent current demand.
On-board electrical system components, shown on B-Class
· A1 Instrument cluster
· B95 Battery sensor
· G1 Battery
· G2 Alternator
· N3/9 CDI control unit
· N3/10 ME-SFI [ME] control unit
· N10 SAM control unit
· N73 EZS control unit
Model series 169 and 245 with code (B01) ECO start/stop function
On vehicles with the ECO start/stop function, an additional battery is installed to support the on-board electrical system during the starting procedure. The following components have been added compared to the standard vehicle:
• Larger on-board electrical system battery with absorbent glass mat design and an output of 70 Ah
• Additional battery with absorbent glass mat design and an output of 12 Ah.
• Intelligent battery sensor
• Battery cutoff relay
The battery sensor determines the charge state of the battery. Absorbent glass mat batteries are used because of the frequent charge and discharge cycles.
The two batteries can be coupled whenever this is necessary for the vehicle to operate properly. This involves connecting the battery and additional battery in parallel.
The electric circuits are separate primarily in order to safeguard the starting ability of the vehicle. For this reason, other consumers are only allowed to consume energy under certain conditions.
The two electric circuits are coupled and decoupled via a battery cutoff relay. The on-board electrical system is coordinated by the SAM control unit.
On-board electrical system components, shown on B 170 with code (B01) ECO start/stop function
· A1 Instrument cluster
· B95 Battery sensor
· G1 Battery
· G1/7 Additional battery
· K19 Battery decoupling relay
· K57/2 Additional battery relay
· M1/10 Starter generator
· N3/10 ME-SFI [ME] control unit
· N10 SAM control unit
· N73 EZS control unit
· N129 Starter generator control unit

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