2025-2026 Mercedes G Class SUV Technical data -> On-board electronics User Manual
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Technical data -> On-board electronics for Your Mercedes G Class SUV Fifth Generation (2025-2026)

631
On-board electronics
Notes on tampering with the drive system
*
NOTE
Premature wear due to improper maintenance
Improper maintenance can cause vehicle parts to wear out more quickly
and can invalidate the vehicle operating permit.
#
Only have the drive system and associated parts serviced at a
qualified specialist workshop.
Two-way radios
NOTES ON INSTALLING TWO-WAY RADIOS
&
WARNING
Risk of accident due to improper work on two-way radios
If two-way radios are manipulated or retrofitted incorrectly, the elec‐
tromagnetic radiation from the two-way radios can interfere with the
vehicle electronics and jeopardise the operating safety of the vehicle.
#
You should have all work on electrical and electronic compo‐
nents carried out at a qualified specialist workshop.
&
WARNING
Risk of accident due to improper operation of two-way radios
If you use two-way radios in the vehicle improperly, their electromag‐
netic radiation can disrupt the vehicle's electronics. This is the case in
the following situations, in particular:
R
The two-way radio is not connected to an exterior aerial.
R
The exterior aerial is fitted incorrectly or is not a low-reflection
aerial.
This could jeopardise the operating safety of the vehicle.
#
Have the low-reflection exterior aerial fitted at a qualified spe‐
cialist workshop.
#
When operating two-way radios in the vehicle, always connect
them to the low-reflection exterior aerial.
G-Class - Owner's Manual
Technical data On-board electronics
F465 0034 02
632
*
NOTE
Invalidation of the operating permit due to failure to comply with
the instructions for installation and use
The operating permit may be invalidated if the instructions for installa‐
tion and use of two-way radios are not observed.
#
Only use approved frequency bands.
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Observe the maximum permissible output power in these fre‐
quency bands.
#
Only use approved aerial positions.
1 Front roof area
2 Rear roof area
Fitting a roof aerial to vehicles with a roof luggage rack is subject to restric‐
tions, and cannot be generally permitted. Further information about these
restrictions can be obtained at a qualified specialist workshop.
Use Technical Specification ISO/TS 21609 (Road Vehicles – "EMCs for installa‐
tion of aftermarket radio frequency transmitting equipment") when retrofitting
two-way radios. Comply with the legal requirements for detachable parts.
If your vehicle is equipped with the pre-installation for a two-way radio,
use the power supply and aerial connectors provided in the pre-installation.
Observe the manufacturer's supplements when fitting.
MOBILE PHONE TRANSMISSION OUTPUT
The maximum transmission output (PEAK) at the base of the aerial must not
exceed the values in the following table.
FREQUENCY BAND AND MAXIMUM TRANSMISSION OUTPUT
Frequency band Maximum transmission output
2‑m‑ frequency band
144 - 174MHz
50W
Terrestrial Trunked Radio (TETRA)
380 - 460MHz
10W
Mobile phone
2G
2 W
Mobile phone
3G/4G/5G
0.5 W
THE FOLLOWING CAN BE USED IN THE VEHICLE WITHOUT RESTRICTIONS:
R
two-way radios with a maximum transmission output of up to 100mW
R
two-way radios with transmitter frequencies in the 380-410MHz fre‐
quency band and a maximum transmission output of up to 2W (TETRA)
R
mobile phones (2G/3G/4G/5G)
THERE ARE NO RESTRICTIONS WHEN POSITIONING THE AERIAL ON THE
OUTSIDE OF THE VEHICLE FOR THE FOLLOWING FREQUENCY BANDS:
R
Terrestrial Trunked Radio (TETRA)
R
2G/3G/4G/5G
G-Class - Owner's Manual
Technical data On-board electronics
F465 0034 02

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