G
WARNING
Modifications to or work performe dincor-
rectly on the following parts can result in the
restraint systems not functioning as intended:
R the restraint system, consisting of seat
belts and their anchorage points, beltt en-
sioners, belt forc elimiters and airbags
R the wiring
R networked electronic systems
Airbags and belt tensioners could fail to
deploy or be triggered in an acciden tdespite
the deceleration forc ebeing sufficien ttotrig-
ger the systems, or could be triggered unin-
tentionally. For this reason, never make any
modifications to the restraint systems.
Therefore, you must not tamper with elec-
tronic components or their software. SRS (Supplemental Restraint System)
Introduction SRS consist
sof:
R the 6 SRS warning lamp
R airbags
R airbag control unit (with crash sensors)
R belt tensioners
R belt force limiters
SRS reduces the risk of occupant scoming
into contact with the vehicle's interior in the
event of an accident .Itcan also reduce the
effect of the forces to which occupant sare
subjected during an accident.
SRS warning lamp SRS functions are checked regularly when
you switch on the ignition and when the
engine is running. Therefore, malfunctions
can be detected in good time.
The 6 SRS warning lamp in the instrument
cluster lights up when the ignition is switched
on. It goes out no later than afew seconds
after the engine is started. G
WARNING
If SRS is malfunctioning, individual systems
may be activated unintentionally or may not
be triggered in the event of an accident with
ah igh rate of vehicle deceleration.
Am alfunction has occurred if:
R the 6 SRS warning lamp does not light
up when the ignition is switched on.
R the engine is runnin gand the 6SRS
warning lamp does not go out after afew
seconds.
R the engine is runnin gand the 6SRS
warning lamp lights up again.
In this case, have SRS checked immediately
at aq ualified specialist workshop. Mercedes-
Benz recommends that you use aMercedes-
Benz Service Centre for this purpose.
In particular, work relevant to safety or on
safety-related systems must be carried out at
aq ualified specialist workshop.
Triggering of belt tensioners, belt force
limiters and airbags During the first stage of
acollision, the airbag
control unit evaluates important physical
data relating to vehicle deceleration or accel-
eration, such as:
R duration
R direction
R magnitude
Based on the evaluation of this data, the air-
bag control unit pre-emptively triggers the
belt tensioners in the first stage.
i The belt tensioners can only be triggered
if the seat belt tongues are correctly
engaged in the seat belt buckles.
If there is an even higher rate of vehicle decel-
eration or acceleration in alongitudinal direc-
tion, the front airbags are also deployed.
Your vehicle has adaptive, two-stage front air-
bags. The airbag control unit evaluates vehi-
cle deceleration or acceleration in the event
of ac ollision. In the first deployment stage, Occupant safety
39Safety Z
H
Environmenta
lnote
Daimler AG also supplies reconditioned
assemblies and part swhicha re of th esame
quality as new parts. For these, th esame war-
ranty applies as for new parts.
Always specify th evehicle identification num-
ber (VIN )(Y page 333) and th eengine num-
ber (Y page 333) when orderin ggenuine
Mercedes-Ben zparts. Vehicle electronics
Tampering with th
eengine electron-
ics G
WARNING
Only have work on th eenginee lectronics and
related component scarried out at aqualified
specialist worksho pwhichh as th enecessary
specialist knowledg eand tools to carry out
th ew ork required .Mercedes-Ben zrecom-
mends that you use aMercedes-Ben zService
Centr efor this purpose. In particular, work
relevant to safety or on safety-related sys-
tems must be carried out at aqualified spe-
cialist workshop. Otherwise, the vehicle's
roadworthiness could be affected.
! Only have maintenanc ework on the
engine electronics and its associated parts,
such as control units, sensor sand connec-
tor leads, carried out at aqualified special-
ist workshop, e.g. aMercedes-Benz Service
Centre. Vehicle componentsm ay other-
wise wear mor equickly and th evehicle's
operatin gpermit may be invalidated. Retrofitting of two-way radios and
mobile phones (RF transmitters)
Use th eTechnical Specification
ISO/TS 21609 35
implementation regulation
when retrofitting RF (radi ofrequency) trans-
mitters. If your vehicle has fittings for two-way radio
equipment, use th
epower supply or aerial
connection sintended for use wit hthe basic
wiring. Be sure to observ ethe manufacturer's
additional instruction swhen installing th efit-
tings.
! Hav eaftermarket radio frequency trans-
mittin gequipmen tinstalled at aquali fied
specialist workshop .Mercedes-Benzr ec-
ommends that you use aMercedes-Benz
Service Centr efor 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
<54M Hz) 100 W
4mw
aveband 30 W
2mw
aveband 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 position
smay be used if
RF transmitters have been properly installed:
35 ISO/TS 2160 9–Technical Specification for Road Vehicles (EMC) guidelines for installation of aftermarket
radio frequenc ytransmitting equipment. Vehicle electronics
331Technical data Z
