Mercedes-Benz GLC : Vehicle electronics / Frequency band and maximum transmission output

The following can be used in the vehicle without
restrictions:
- Two-way radios with a maximum transmission
output of up to 100 mW
- RF transmitters with transmitter frequencies
in the 380 - 410 MHz frequency band and a
maximum transmission output of up to 2 W
(TETRA)
- Mobile phones (2G/3G/4G)
There are no restrictions when positioning the
antenna on the outside of the vehicle for the following
frequency bands:
- Terrestrial Trunked Radio (TETRA)
- 70 cm frequency band
- 2G/3G/4G
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 electromagnetic radiation
from the two-way radios can interfere with
the vehicle electronics and jeopardize the
operating safety of the vehicle...
Manufacturer information about wireless vehicle
components can be found using the key phrase
"Radio operating permits" in the Digital Operator's
Manual in the vehicle, on the Internet and
in the app...
Other information:
Requirements:
The ignition is switched on.
The starter battery is sufficiently charged.
The Mercedes‑Benz emergency call system triggers
an emergency call automatically in the following
cases:
After activation of the restraint systems such
as airbags or Emergency Tensioning Devices
after an accident
After an automatically initiated emergency
stop by Active Emergency Stop Assist
The emergency call has been made:
A voice connection is made to the
Mercedes‑Benz emergency call center...
The system may be impaired or may not function
in the following situations, for example:
In snow, rain, fog, heavy spray, if there is
glare, in direct sunlight or in greatly varying
ambient light.
If there is swirling dust, e.g. when driving offroad
or on sandy surfaces...