Power supply, system overview: E60, E61, E63, E64

This system overview comprises the following overviews:

  • Inputs/outputs (power supply for 6-cylinder engine version)
  • Principle of electrical energy management
  • Principle of power management
  • System circuit diagram (power supply for 6-cylinder engine version) until 09/2005  
  • Overview of control unit on terminal 30g until 09/2005
  • Overview of control unit on terminal 30g-f until 09/2005
  • System circuit diagram (power supply for 6-cylinder engine version) from 09/2005  
  • Overview of control unit on terminal 30g from 09/2005
  • Overview of control unit on terminal 30g-f from 09/2005
  • Earth points (left-hand drive vehicles)


- Inputs/outputs

Power supply for 6-cylinder engine version

Item Description Item Description
1 Digital engine electronics (DME) 2 Alternator
3 Starter relay 4 Power distributor, front
5 Car Access System (CAS) 6 >from 09/2005: START/STOP button with insert compartment and remote control
7 >Until 09/2005: Ignition starter switch 8 >Until 09/2005: Micro-power module (MPM)
> From 09/2005: Body-gateway module
The MPM function is integrated into the KGM.
9 Rear power distributor with terminal 30g relay 10 Starter motor
11 Battery 12 Intelligent battery sensor (IBS)


- Principle of electrical energy management

Item Description Item Description
1 Car Access System (CAS) 2 Current flow to consumers
3 Battery 4 Intelligent battery sensor (IBS)
5 Bit-serial data interface (BSD) 6 Digital engine electronics (DME)
7 Power management 8 Increased idling speed
9 Engine 10 Mechanical energy (alternator drive)
11 Alternator 12 Battery charge current
13 Nominal value for charge voltage 14 Consumer shutdown
15 Terminal 30g relay 16 Rear power distributor, consumers on terminal 30g
17 Terminal 15 wake-up wire 18

>up to 09/2005: Micro-power module (MPM)

>from 09/2005: Body gateway module (KGM)

The MPM function is integrated into the KGM.

19 Power distributor, front 20 Electric energy management
K-CAN Body controller area network Kl. 15 Terminal 15, ignition lock position 2


- Principle of power management

Item Description Item Description
1 Voltage (U) 2 Current (I ±)
3 Temperature (T) 4 Digital engine electronics (DME)
5 Power management 6 Erasable Programmable Read-Only Memory (EPROM) with battery maps for:
- Voltage (U)
- Current (I ±)
- Temperature (T)
7 Idle-speed control 8 Nominal value for charge voltage
9 Auxiliary consumer cutoff 10 Load peak reduction
IN Input information OUT Output information


- System circuit diagram

>System circuit diagram power supply for 6-cylinder engine version until 09/2005  

Example: E60

Item Description Item Description
1 Battery 2 Safety battery terminal
3 Intelligent battery sensor (IBS) 4 Rear power distributor with terminal 30g relay and terminal 15 relay
5 Power distributor, front 6 Alternator
7 Starter motor 8 Digital engine electronics (DME)
9 DME main relay 10 Car Access System (CAS)
11 Micro-power module (MPM) K-CAN Body CAN
Kl. 15 Terminal 15, ignition lock position 2 Kl. 30 Terminal 30, power supply
Kl. 30g Terminal 30g, active Kl. 30g-f Terminal 30 g-f
Kl. 87 Terminal 87 BSD Bit-serial data interface


- Overview of control unit on terminal 30g-f until 09/2005

The control units with power supply via terminal 30g are highlighted.
Item Description Item Description
ACC Active cruise control AMP Amplifier
CID Central Information Display CON Controller
CVM Convertible top module DSC Dynamic Stability Control
EGS Electronic transmission control EHC Electronic height control
HUD Head-up display KHI Headphone interface
RLS Rain-light sensor SDARS Satellite tuner
SHD Sliding/tilting sunroof (on E61: Panorama glass sunroof) SMG Sequential manual gearbox
SZM Centre console switch cluster TCU Telematics control unit
ULF Universal charger and hands-free system VM Video module
VTG Transfer case    


- Overview of control unit on terminal 30g-f until 09/2005

The control units with power supply via terminal 30g-f are highlighted.
Item Description Item Description
CCC Car Communication Computer CDC CD changer
JNAV Japan navigation system KNAV Korea navigation system
M-ASK Multi-audio system controller    


- System circuit diagram

> System circuit diagram power supply for 6-cylinder engine version from 09/2005  

Example: E60

Item Description Item Description
1 Battery 2 Safety battery terminal
3 Intelligent battery sensor (IBS) 4 Rear power distributor with terminal 30g relay and terminal 15 relay
5 Power distributor, front 6 Alternator
7 Starter motor 8 Digital engine electronics (DME)
9 DME main relay 10 Car Access System (CAS)
11 Body gateway module (KGM) K-CAN Body CAN
Kl. 15 Terminal 15, ignition lock position 2 Kl. 30 Terminal 30, power supply
Kl. 30g Terminal 30g, active Kl. 30g-f Terminal 30 g-f
Kl. 87 Terminal 87 BSD Bit-serial data interface


- Overview of control unit on terminal 30g from 09/2005

The control units with power supply via terminal 30g are highlighted.
Item Description Item Description
ACC Active cruise control AL Active Steering
ALBBF Active seat back width, front passenger seat ALBFA Active seat back width, driver's seat
AMP Amplifier ARS Active roll stabilisation (sales designation: Dynamic Drive)
CID Central Information Display CON Controller
CVM Convertible top module DSC Dynamic Stability Control
EGS Electronic transmission control EHC Electronic height control
EKP Regulated fuel pump HKL Tailgate lift
HUD Head-up display IBOC Digital tuner US
IHKA Integrated automatic heating and air-conditioning system KHI Headphone interface
NVE Night-vision electronics (from 03/2006) PDC Park Distance Control
RDC Tyre pressure control (from 03/2006, US version only) RLS Rain-light sensor
SDARS Satellite tuner SH Independent heating
SHD Sliding/tilting sunroof (on E61: Panorama glass sunroof) SMG Sequential manual gearbox
SZM Centre console switch cluster VM Video module
VTG Transfer case    


- Overview of control unit on terminal 30g-f from 09/2005

The control units with power supply via terminal 30g-f are highlighted.
Item Description Item Description
CA Comfort Access CCC Car Communication Computer
CDC CD changer JNAV Japan navigation system
KOMBI Instrument cluster KNAV Korea navigation system
M-ASK Multi-audio system controller SZL Steering column switch cluster
TCU Telematics control unit ULF Universal charger and hands-free system


- Earth points

The earth points on the example of the E60 are illustrated for left-hand-drive vehicles. Installation locations may differ on right-hand drive vehicles.

Example: E60

Item Description Item Description
1 X13782 - A-pillar, right 2 X13784 - door entrance, A-pillar
3 X14054 - electric auxiliary heater 4 X13797 - A-pillar, right (blower)
5 X14234 - AFS control unit 6 X13786 - under front-passenger seat
7 X13788 - under front-passenger seat 8 X13790 - wheel arch, rear right
9 X13794 - luggage compartment, rear right 10 X13792 - luggage compartment, rear right
11 X6402 - luggage compartment (battery) 12 X13793 - luggage compartment, rear left
13 X13795 - luggage compartment, rear left 14 X13791 - wheel arch, rear left
15 X13789 - under driver's seat 16 X13787 - under driver's seat
17 X13785 - door entrance, A-pillar, right 18 X13783 - door entrance, A-pillar
19 GRAV earth point, engine compartment, left    
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