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Mercedes-Benz Body & Equipment Guideline for Metris - BM 447, Version November 27, 2015.
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102
9.4 Interfaces/electrical lines
9 Electrical system
9.4
Interfaces/electrical lines
a
WARNING
As all consumers are networked and internally
monitored, no modifications should be made to the
CAN bus (e.g. breaking, extending or tapping). Any
modification to the cable harness in terms of length,
cross-section or resistance can lead to the failure
of safety-relevant components and consequently to
accidents or damage to the vehicle.
9.4.1 Electrical lines/fuses
Only unleaded, PVC-coated cables with an insu-
lation operating temperature limit of more than
105 °C/221 °F may be used. Lines and connections
must be designed professionally and water-tight, and
must be protected against impact, heat and abrupt
detachment. The line must be dimensioned in accor-
dance with the current level drawn and protected with
fuses, see 5.5.1 “Electric wiring/fuses” (
Installation of lines
If the routing has to be altered, avoid routing across
sharp edges and through narrow cavities or near mov-
ing components.
The wiring duct must not be damaged or re-routed
when carrying out modifications in the area of the
transmission tunnel.
The wiring duct in the cargo area/passenger compart-
ment is located in the center along the longitudinal
vehicle axis in the vicinity of the rear-end door/liftgate.
When modifications are performed in this area, the
cable routing must be carried out so that the overall
length of the individual cable harnesses is maintained.
1
Cable duct
Arrow Direction of travel
9.4.2 Cable extension
An identical or larger wiring cross-section is to be
used for wiring extensions. We recommend the use of
wiring that conform with DIN 72551 or ISO 6722-3.
The protective effect of retaining elements must not be
impaired.
All connections must be designed professionally and
water-tight in accordance with IP 69k (resistant to
high-pressure cleaning).