2025-2026 Mercedes G Class SUV General notes -> Operating safety User Manual
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General notes -> Operating safety for Your Mercedes G Class SUV Fifth Generation (2025-2026)

87
Operating safety
&
WARNING
Risk of accident due to malfunctions or system failures
If you do not have the prescribed service/maintenance work or any
required repairs carried out, this could result in malfunctions or system
failures.
#
Always have the prescribed service‑ and maintenance work or
any required repairs carried out in a qualified workshop.
&
WARNING
Risk of accident or injury due to improper modifications to elec‐
tronic components
Modifications to electronic components, their software or wiring can
impair their functionality and/or the functionality of other networked
components or safety-relevant systems.
This can endanger the vehicle's operating safety.
#
You must not tamper with wiring, electronic components, or
their software.
#
Always have work on electrical and electronic devices carried
out at a qualified specialist workshop.
If you modify the on-board electronics, the general operating permit is ren‐
dered invalid.
Observe the "On-board electronics" section in "Technical data".
*
NOTE
Impairment of the operating efficiency of the vehicle or individual
components due to tampering with the on-board electronics
The vehicle is equipped by the manufacturer with various safety mecha‐
nisms that interact with each other.
IF THE SYSTEM DETECTS TAMPERING WITH THE ON-BOARD ELEC‐
TRONICS DUE TO AN UNAUTHORISED MODIFICATION OF CONTROL
UNITS AND/OR THEIR SOFTWARE/DATA, THIS MAY HAVE THE FOL‐
LOWING EFFECTS:
R
Individual vehicle functions are (temporarily) no longer opera‐
tional.
R
The overall vehicle is (temporarily) no longer operational.
#
Have the vehicle checked immediately at a qualified specialist
workshop and, if necessary, reset to factory settings.
G-Class - Owner's Manual
General notes Operating safety
F465 0034 02
88
*
NOTE
Damage to the vehicle due to driving too fast and due to impacts
to the underbody and suspension components
IN THE FOLLOWING SITUATIONS IN PARTICULAR, THERE IS A RISK
OF DAMAGE TO THE VEHICLE:
R
The vehicle bottoms out, e.g. on a high kerb or unmade road.
R
The vehicle is driven too fast over an obstacle, e.g. a kerb, speed
bump or pothole.
R
A heavy object strikes the underbody or suspension components.
In these or similar situations, the vehicle body, the underbody, suspen‐
sion components, wheels, tyres, or parts of the high-voltage battery
could incur damage, even if this is not visible. Components damaged in
this way can fail unexpectedly, lead to an increased risk of fire, or, in the
event of an accident, no longer be able to withstand the stresses arising
as intended.
#
Have the vehicle checked and repaired immediately at a quali‐
fied specialist workshop.
or
#
If driving safety is impaired while continuing your journey, pull
over and stop the vehicle immediately, with due attention to
road and traffic conditions, and contact a qualified specialist
workshop.
Electric vehicles have an electric motor. The energy supply for the electric
motor comes from the high-voltage on-board electrical system.
&
DANGER
Risk of death and fire due to modified and/or damaged compo‐
nents of the high-voltage on-board electrical system
The vehicle's high-voltage on-board electrical system is under high
voltage. If you modify component parts in the vehicle's high-voltage on-
board electrical system or touch damaged component parts, you may
be electrocuted. In addition, modified and/or damaged components
may cause a fire.
In the event of an accident or impact to the underbody, components of
the high-voltage on-board electrical system may be damaged although
the damage is not visible.
#
Never make any modifications to the high-voltage on-board
electrical system.
#
Do not switch on or use the vehicle if its high-voltage on-
board electrical system components have been modified or
damaged.
#
Never touch damaged components of the high-voltage on-
board electrical system.
#
After an accident, do not touch any components of the high-
voltage on-board electrical system.
#
After an accident, have the vehicle transported away.
#
Have the components of the high-voltage on-board electri‐
cal system checked at a qualified specialist workshop and
replaced if necessary.
G-Class - Owner's Manual
General notes Operating safety
F465 0034 02
89
The components of the high-voltage on-board electrical system are marked
with yellow warning stickers. The cables of the high-voltage on-board electri‐
cal system are orange.
Example
High-voltage components that can become very hot are marked with a sepa‐
rate warning sticker:
Vehicles with an electric motor generate significantly less vehicle noise emis‐
sions than vehicles with combustion engines.
This means that other road users may fail to hear the vehicle owing to its
significantly lower driving noise.
It is for this reason that the vehicle is equipped with a sound generator, which
serves as an acoustic vehicle alerting system (AVAS). This protective measure
is prescribed by law.
This exterior noise by the sound generator (AVAS) is audible in the vehicle
interior at low speeds, and is not a malfunction.
G-Class - Owner's Manual
General notes Operating safety
F465 0034 02

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