ist workshop, e.g. a Mercedes-Benz Service
Centre. Vehicle components may other-
wise wear more quickly and the vehicle's
operating permit may be invalidated.
Retrofitting of two-way radios and
mobile phones (RF transmitter)
Use the Technical Specification
ISO/TS 21609
55
implementation regulation
when retrofitting RF (radio frequency) trans-
mitters.
If your vehicle has fittings for two-way radio
equipment (e.g. taxis, hire cars or official vehi-
cles), use the power supply or aerial connec-
tions intended for use with the basic wiring.
Be sure to observe the manufacturer's addi-
tional instructions when installing the fittings.
!
Have aftermarket radio frequency trans-
mitting equipment installed at a qualified
specialist workshop. Mercedes-Benz rec-
ommends that you use a Mercedes-Benz
Service Centre for this purpose.
The transmission output at the aerial base
must not exceed the maximum values below.
Waveband
Maximum trans-
mission output
(PEAK)
Short wave (f <
54 MHz)
100 W
4 m waveband
30 W
2 m waveband
50 W
Trunked radio/Tetra 35 W
70 cm waveband
35 W
GSM 900/AMPS
10 W
GSM 1800
10 W
UMTS
10 W
The following aerial positions may be used if
RF transmitters have been properly installed:
Aerial positions: Coupé
:
Front roof area
56
;
Rear roof area
56
=
Rear wing
57
?
Boot lid
Aerial positions: Cabriolet
:
Rear wing
57
G
Risk of accident
Incorrect retrofitting of RF transmitters can
cause the vehicle electronics to malfunction,
impair the vehicle's operating safety and,
thus, also impair your own safety.
To ensure proper installation, Mercedes-Benz
recommends having this work done at a
Mercedes-Benz Service Centre or at another
qualified specialist workshop.
55
ISO/TS 21609 – Technical Specification for Road Vehicles (EMC) guidelines for installation of aftermarket
radio frequency transmitting equipment.
56
Vehicles with panorama sliding sunroof: this area is not permitted.
57
Recommended installation position: on the side which faces the centre of the road.
Vehicle electronics
311
Tech
nical
da
ta
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