quality as new parts. For these, the same war-
ranty applies as for new parts.
Always specify the vehicle identification num-
ber (VIN) (Y page 254) and the engine num-
ber (Y page 255) when ordering genuine
Mercedes-Benz parts.
Vehicle electronics
Tampering with the engine electron-
ics
G
Risk of accident
Only have work on the engine electronics and
related components carried out at a qualified
specialist workshop which has the necessary
specialist knowledge and tools to carry out
the work required. Mercedes-Benz recom-
mends that you use a Mercedes-Benz Service
Centre for this purpose. In particular, work
relevant to safety or on safety-related sys-
tems must be carried out at a qualified spe-
cialist workshop. Otherwise, the vehicle's
roadworthiness could be affected.
!
Only have maintenance work on the
engine electronics and its associated parts,
such as control units, sensors and connec-
tor leads, carried out at a qualified special-
ist workshop, e.g. a Mercedes-Benz Service
Centre. Vehicle componentsmay other-
wise wear more quickly and the vehicle's
operating permit may be invalidated.
Retrofitting of two-way radios and
mobile phones (RF transmitters)
Use the Technical Specification
ISO/TS 21609
46
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-Benzrec-
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:
46
ISO/TS 21609–Technical Specification for Road Vehicles (EMC) guidelines for installation of aftermarket
radio frequency transmitting equipment.
Vehicle electronics
253
Technical data
Z
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