Overall network
56
Networking
Introduction of the New G-Class, Model Series 463
g
Network architecture
A new network architecture is used in model series
463.
It provides the basis for new, innovative and customer-
oriented features such as telematics, driver support
systems etc. and thus secures the competitiveness of
the G-Class.
The technological leap is evident in the following
features:
• New CAN matrices (IDs, signals, timings etc.)
• Increase in number of signals to approx. 3000
• Speed of Body CAN changed from 83.33 kBd to
125 kBd
• Modified function distribution
• Introduction of energy and power management
The architecture consists of a hierarchical bus system
with CAN networking of the engine, drivetrain and
interior bus. MOST networking links the telematics
components. Coupled to this are sub-bus systems for
sensors and actuators.
Fuse concept
The fuse concept is designed so that all relevant lines
are electrically protected by fuses. The Central Body
Controller (CBC) is located on the front of the center
console underneath the selector lever module and
replaces the previous SAM. The Rear Body Controller
(RBC) is located in the rear of the vehicle in the former
battery box.
Interior systems
Most of the systems serve the purpose of basic elec-
trical functions e.g. lights, drive authorization and the
interior comfort systems.
A central element of the interior network is the Central
Body Controller (CBC). Alongside functions such as
lighting, the wiper system and central locking, the CBC
is also responsible for on-board electrical system
management. Power levels are adapted to require-
ments in combination with a battery sensor in order to
ensure availability.
The ignition/starter switch acts as a central gateway
between the interior and engine compartment
network and for the entire vehicle diagnosis function.
Wiring harness concept
For the first time, the wiring to the starter and alter-
nator is protected by a pyrofuse. The existing wiring
harness structure has been maintained because the
corresponding installation space is also unchanged.
The wiring harnesses have a modular design based on
the different assembly areas such as the engine block,
doors, cockpit and interior.
For reasons related to electromagnetic compatibility
(EMC), the antenna lines are routed along the roof
frame separately from the other wiring harnesses.
The wiring harnesses are attached to the vehicle using
appropriate assembly clips which are pre-installed on
the wiring harness and Tucker bolts on the body
panels.
i
Note
The fuses are located in the prefuse box and in the
fuse/relay blocks
– This printout will not be recorded by the update service. Status: 03 / 2012 –
