MERCEDES-BENZ M-CLASS SUV 2011 Workshop Manual

Sea
tbelt adjustment The seat-belt adjustment func
tion adjusts the
driver's and front-passenger seat belt to the
upper body of the occupants.
The belt strap is tighte neds lightly when:
R you engage the belt tongue in the belt
buckle and you then turn the key to position
2 in the ignition lock.
R the key is in position 2in the ignition lock
and you then engage the belt tongue in the
buckle.
The seat-belt adjustment will apply acertain
tightening force if any slack is detected
between the occupant and the seat belt. Do
not hold on to the seat belt tightly while it is
adjusting. You can switc hthe seat-belt
adjustment on and off in the on-boar dcom-
puter (Y page 251).
The seat-belt adjustment is an integra lpart of
the PRE-SAFE ®
convenience function. More
information about PRE-SAFE ®
can be found
in the "PRE-SAFE ®
(preventative occupant
protection)" section (Y page 45).
Belt height adjustment You can adjust the seat belt height on the
driver' sseat and the front-passenger seat. Adjust the height so that the upper part of the
seat belt is routed across the centre of your
shoulder. X
To raise: slide the belt sash guide upwards.
The belt sash guide engages in various posi-
tions.
X To lower: press and hold belt sash guide
release :.
X Slide the belt sash guide downwards.
X Release belt sash guide release :and
mak esure that the belt sash guide has
engaged.
Releasing seat belts X
Press release button ?(Ypage 47) and
guide belt tongue ;back towards belt
sash guide :.
! Make sure that the seat belt is fully rolled
up. Otherwise, the seat belt or belt tongue
will be trapped in the door or in the seat
mechanism. This could damage the door,
the door trim panel and the seat belt. Dam-
aged seat belts can no longer fulfil their
protective function and must be replaced.
Consult aMercedes-Benz Servic eCentre.
Belt warning for driver and front
passenger The
7 seat belt warning lam pint he instru-
men tcluster is areminder for all occupants
to fasten their seat belts. It may light up con-
tinuously or flash. In addition ,there ma ybea
warning tone.
The 7 seat belt warning lamp goes out and
the warning tone ceases when the driver and
the front passenge rhave fastened their seat
belt.
For certain countries only: regardless of
whethe rthe driver or the front passenger
hav efastened their seat belts, the 7seat
belt warning lamp lights up for six seconds
after the engine is started. It then goes out if
the driver and the front passenger have fas-
tened their seat belts.
i For more information on the 7seat
belt warning lamp, see "Warning and indi- 48
Occupant safetySafety

cator lamps in the instrument cluster, se
at
belt" (Y page284).
Rear seat belt status indicator Th
er ear-com partment se at belt status indi-
cator tells you if the rear passengers have
their seat belts fastened.
The rear-compartment seat belt status indi-
cator indicates the rear seat on which the belt
is fastened. The üsymbol in the display
indicates afastened seat belt. If aseat belt is
not fastened or if aseat is not occupied, the
ý symbol is displayed.
The rear-compartment seat belt status indi-
cator appear sint he multifunction displa yfor
around 30 seconds if:
R you drive off and reach aspeed of approx-
imately 10 km/h.
R the rear passengers fasten or unfasten
their seat belts while the vehicle is in
motion.
R someon egets in or out of the vehicle and
the vehicle drives off again.
You can also can celthe rea rseat belt status
indicator immediately (Y page 253).
i The status indicator for the rear- compart-
ment seat belts is onl yavailable for certain
countries.
Bel ttensioners, belt force limiters The fron
tseat belts and the outer seat belts
in the rear are equipped with belt tensioners.
The belt tensioners tighten the seat belts in
an accident, pullin gthem close against the
body.
Belt tensioner sdonot correct incorrect seat
positions or incorrectly faste neds eat belts.
Belt tensioners do not pull vehicle occupants
back towards the back rest.
If the seat belt is also fitted wit habelt for ce
limiter and this is triggered, the forc eexerted
by the sea tbelt on the vehicle occupan tis
red uced. Th
eb elt force limiters on the front seats are
synchroni sedw ith the front airbags .They
tak eonap art of the deceleratio nforce,
resultin ginthe force exerted on the occupant
being distributed over agreater are a.
The belt tensioners can only be activated
when:
R the ignition is switched on.
R the restraint systems are operational; see
"SRS warning lamp" (Y page 41).
R the front-passenger seat is occupied and
the belt tongue is engaged in the buckle on
the front-passenger side.
The belt tensioners on the outside seats in the
rear compartment are triggered independ-
ently of the lock status of the seat belts.
The belt tensioners are triggered depending
on the type and severit yofanaccident:
R if, in the event of ahead-on or rear-en dcol-
lision, the vehicle decelerates or acceler-
ates rapidly in alongitudinal direction dur-
ing the initial stages of the impact
R if, in the even tofaside impact, on the side
opposit ethe impac tthe vehicle deceler-
ates or accelerates rapidly in alateral direc-
tion
R if in certain situations where the vehicle
overturns and the system determines that
it can provide additional protection
If the airbags are deployed, you will hear a
bang, and asmall amount of powder may also
be released. Only in rare cases will th ebang
affect your hearing. The powde rthat is
released generally does not constitute a
healt hhazard. The 6SRS warning lamp
lights up. G
WARNING
If the seat belt tensioners have been trig-
gered, they provide no additional protection
in the event of another accident. Therefore,
have belt tensioners which have been trig-
gered replaced at aqualified specialist work-
shop. Occupant safety
49Safety
Z

Comply with safety regulations when dispos-
ing of belt tensioners. Any Mercedes-Benz
Servic eCentr ecan provide details of these
regulations.
! If the front-passenger seat is not occu-
pied, do not engage the seat belt tongue in
the buckle on the front-passenger seat.
Otherwise, the belt tensioner could be trig-
gered in the event of an accident. Children in the vehicle
Child restraint systems
Important safety notes G
WARNING
To reduce the risk of serious or even fatal
injury to the child in the event of asudden
change in direction, braking or an accident:
R children less than 1.50 mtall and under
twelve years of age must always be secured
in special child restraint systems on asuit-
able vehicle seat. This is necessary
because the seat belts are not designed for
children.
R do not secure children less than 1.50 mtall
or under twelv eyears of age on th efront-
passenger seat .Exception: the vehicl eis
equipped with automatic child sea trecog-
nition on the front-passenger seat and the
child is secured in achild rest raint system
with transponders for automatic child seat
recognition.
R if you secure aforward-facing child
rest raint system to the front-passenger
seat, you must move the front-passenger
seat as far back as possible.
R children must never travel sitting on the lap
of another occupant .Due to the forces
which occur in the event of asudden
change of direction, heavy braking or an
accident, it would not be possible to
restrain the child. The child could be thrown against parts of the vehicle interior and be
seriously or even fatally injured. G
WARNING
The child restraint system cannot perform its
protective function if it is not correctly fitted
to as uitable vehicle seat. The child cannot be
restrained in the event of an accident, heavy
braking or sudde nchanges of direction. The
chil dcould be seriously or even fatally injured.
For this reason, when fit ting achild rest raint
system, observe the manufacturer's installa-
tion instructions and the correct use of the
child restraint system.
Child restraint systems should be fitted to the
rear seats. Children are generally better pro-
tected there.
The entire base of the child restraint system
must always rest on the seat cushion. There-
fore, never place objects, e.g. acushion,
under the child restraint system.
Only use child restraint systems with the orig-
inal cover designed for them. Only replace
damaged cover swith genuine Mercedes-Benz
covers.
We recommend the use of child restraint sys-
tems which have been approved for
Mercedes-Benz vehicles.
If ac hild is travellin ginyour vehicle, secure
the child using achild restraint system which
is appropriate to the size, age and weight of
the chil dand recommende dfor Mercedes-
Ben zvehicles. You should preferabl yfit the
restraint system to asuitable rear seat. Make
sure that the child is secured in achild
restraint system thr oughout the trip.
Mercedes-Ben zrecommends that you only
use the child restraint system slisted at
(Y page 58).
You can obtain further information about the
correct child restrain tsystem from any
Mercedes-Benz Service Centre.
i It is advisable to use Mercedes-Benz care
products to clean child restraint systems. 50
Childre
ninthevehicleSafety

You can obtain informa
tion about this at
any Mercedes-Ben zServic eCentre. G
WAR
NING
Do not leave child renu nsupe rvised in the
vehicle, even if they are secured in achild
restraint system. They coul dinjure them-
selves on parts of the vehicle. The ycould also
be seriou slyor even fatally injure dbypro-
longed exposure to extreme heat or cold.
Do not expose th echild restraint system to
direc tsunlight .Part soft he child restraint sys-
te mc ould heat up and the child coul dburn
herself/himself on them.
If ac hild opens adoor, the child or other per-
sons coul dbeinjured as aresult. They could
get out and injure themselves or be injured by
ap assing vehicle.
Also observe the notes on HOLD .Relevant
information can be foun dinthe index. G
WARNING
Unsecured or incorrec tlyp ositioned loads
inc rease the risk of injury for children and all
other occupant sinthe even tof:
R an accident
R ab raking manoeuvre
R as udden change of direction
Do not carry heavy or hard objects in the vehi-
cle interior unless they are secured. You will
find further information under "Loading guide-
lines" in the index.
Child seat on the front-passenger seat Warning notice on the front-passenger sun visor Warning symbol for
arearward-facin gchild
rest raint system G
WARNING
If the front-passenger airbag is not disabled:
R ac hild secured in achild rest raint system
on the front-passenger seat could be seri-
ously and even fatally injured by the front-
passenger airbag deploying. This is espe-
cially arisk if the child is in the immediate
vicinit yofthe front-passenger airbag when
it deploys.
R never secur eachild on the front-passenger
seat in arearward-facing child restraint sys-
tem. Only secur earearward-facing child
restraint system on asuitable rear seat.
R alway smove the front-passenger seat to
the rearmost position if you secur eachild
in af orward-facing child rest raint system
on the front-passenger seat.
The front-passenger airbag is not disabled:
R on vehicles without automatic child seat
recognition on the front-passenger seat
R in vehicles with automatic child seat rec-
ognition in the front-passenger seat, if no
special child restraint system with trans-
ponders for automatic child seat recogni-
tion in the front-passenger seat has been
fitted
R on vehicles with automatic child seat rec-
ognition on the front-passenger seat, if the
PASSENGER AIRB AGOFF indicator lamp
4 is not lit.
To make you aware of this danger, acorre-
spondin gwarning sticker has been affixed on Children in th
evehicle
51Safety
Z

the dashboard and on both side
softhe sun
visor on the fr ont-passenge rside.
Information about recommended child
restraint system sisavailabl eatany
Mercedes-Ben zServic eCentre.
Automatic child seat recognition on the
front-passenger seat If your vehicle does not have automatic child
seat recognition 1
on the fron t-passenger
seat, this is indicated by aspecial sticker .The
stic kerisa ffixe dtot he side of the dashboard
on the front-passenger side. The stic keris
visible when yo uopen the front-passenger
door. The front-passenger seat sensor system for
child restraint systems detect swhether a
special Mercedes-Ben zchild seat with a
transpo nder for automatic child seat recog-
nition has been fitted. In this case, 4
PASSENGER AIRBA GOFF indicato rlamp : lights up. The front-passenger front airbag is
disabled. G
WARNING
If the 4 PASSENGER AIRBAG OFF indica-
tor lamp does not light up when the child
restraint system is fitted, the front-passenger
airbag has not been disabled. If the front-
passenger airbag deploys, the child could be
seriously or even fatally injured.
Proceed as follows:
R do not use arearward-facing child restraint
system on the front-passenger seat.
R fit arearward-facing child restraint system
on asuitable rear seat.
or
R only use aforward-facing child restraint
system on the front-passenger seat and
mov ethe front-passenger seat to the rear-
most position.
R hav ethe automatic chil dseat recognition
checked at aqualified specialist workshop.
To ensure that the automatic child seat rec-
ognitio nonthe front-passenger seat func-
tions/communicates correc tly, never place
objects, e.g. acushion, under the child
restraint system. The entire base of the child
restraint system must always rest on the seat
cushion. An incorrectly fitted child restraint
system cannot perform its intended protec-
tive function in the event of an accident, and
could lead to injuries.
i If the front-passenger front airbag is dis-
abled by the automatic child seat recogni-
tion, the following remain enabled on the
front-passenger side:
R the sidebag
R the windowb ag
R the belt tensio ner
1 Vehicles withou tautomatic child seat recognition on the front-passenger seat: if you turn the key to position
2int he ignition lock ,the 4 PASSENGER AIRBAG OFF indicator lamp lights up briefly but has no function.
It does not indicate that there is automatic child seat recognition on the front-passenger seat. 52
Childre
ninthe vehic leSafety

G
WARNING
Do not pl acee lectronic devices on the front-
passenger seat, e.g.:
R laptops, when switched on
R mobil ephones
R cards with transponders, e.g. ski passes or
access cards
Signals from electronic equipment can cau se
interference in the automatic child seat rec-
ognitio nsensor system. This can lead to a
system malfunc tion. This may cause the
4 PASSENGER AIRBA GOFF indicator
lamp to light up without there being achild
seat with transponder sfor automatic child
seat recognition fit ted. The front-passenger
airba gwill not then deploy during an accident.
It is also possible that the 6SRS warning
lamp lights up and/or the 4PASSENGER
AIRB AGOFF indicator lam pdoes not light up
briefly when you tur nthe key in the ignition
lock to position 2.
ISOFIX child seat securing system for
th er ear seats ISOFIX is
astandardised securing syste mfor
specially designed child restraint system son
the rear seats .Securin grings for two ISOFIX
child restraint systems are fitted on the left
and right of the rear seats. G
WAR
NING
Ac hild restraint system secured by the ISOFIX
chil dseat securing system does not provide
sufficien tprotection for children weighing
more than 22 kg. For this reason, do not
secure children weighing more than 22 kg in
ac hild restraint system secured by the ISOFIX
chil dseat securing system. If the child weighs
mor ethan 22 kg, secur ethe chil drestraint
system using athree-point seat belt. G
WARNING
The chil drestraint system cannot perform its
protec tive function if it is not correctly fitted
to as uitable vehicle seat. The child cannot be restrained in the event of an accident, heavy
braking or sudde
nchanges of direction. The
chil dcould be seriously or even fatally injured.
For this reason, when fittin gachild restraint
system ,observ ethe manufacturer' sinstalla-
tion instructions and the correct use of the
child restraint system.
For reasons of safety, only use child restraint
systems with the ISOFIX child sea tsecuring
system on the rear seats.
We recommen dthat you use the ISOFI Xchild
restraint system sthat hav ebeen recommen-
ded for Mercedes-Benz.
An incorrectly fitted child restraint system
could com eloose and seriously or even fatally
injure the child or other vehicle occupants.
When fittin gthe chil drestraint system, always
mak esure that it is engage dcorrectly in the
securing rings on both sides. G
WARNING
Please note that if child restraint systems, or
their retaining systems, are damaged or sub-
jected to aload in an accident ,they ma ynot
be able to provide their protective function.
This coul dresult in serious or even fatal inju-
ries to the secured child in the event of an
accident, heavy braking or asudden change
in direction.
For this reason, have child restraint systems
and their anchorages which have been dam-
aged or subjected to aload in an accident
chec kedi mmediatel yataq ualified specialist
workshop.
! Whe nfittin gthe chil drestraint system,
mak esure that the seat belt for the centre
seat does not get trapped. Otherwise, the
seat belt could be damaged. Children in the vehic
le
53Safet y Z

:
Securing rings
X Install the ISOFIX child restraint system.
Compl ywitht he manufact urer's instruc-
tions when installing the ISOFI Xchild
restra ints ystem.
Top Tether Top Tether provides an additiona
lconnection
between the child restra ints ystem se cured
with ISOFIX and the rea rseat. It helps reduce
the risk of injury even further.
The Top Tether anchorages are located on the
rear side of the rear seat back rests. X
Move head restraint =upwards.
X Fit the ISOFIX chil drestraint system with
Top Tether .Compl ywith the manufactur-
er' sinstallatio ninstructions whe ndoing so.
X Rout eTop Tether belt Bunder head
rest raint = between the two head restraint
bars.
X Guide Top Tether belt Bdownwards
between luggage compar tment cover:
and rear seat backrest ;.
X Hook Top Tethe rhook Aof Top Tether belt
B intoT op Tether anchorage ?.
Ensure that:
R Top Tether hook Ais hooked int oTop
Tether anchorage ?as shown.
R Top Tether belt Bis not twisted.
R Top Tether belt Bis routed between rear
seat backrest ;and luggage compart-
men tcover :if luggage compartment
cover :is fit ted.
R Top Tether belt Bis routed between rear
seat backrest ;and the safety net if the
safety net is fit ted. 54
Children in the vehicleSafety

X
Tension Top Tether belt B.Complywith
the manufacturer's installation instruc-
tions when doing so.
X Move head restraint =back down again
slightly if necessary (Y page 95). Make
sure that you do not interfere with the cor-
rect routing of Top Tether belt B. Children in the vehicle
55Safety Z

Problems wit
hchilds eat recognition Problem Possible causes/consequences and
M Solutions
The
4 PASSENGER
AIRB AGOFF indicator
lam ponthe cen trecon-
sole is lit. As
pecial Mercedes-Benz child seat with atransponde rfor auto-
matic child seat recognition has been fit tedtot he front-passenger
seat. The front-passenger airbag has therefor ebeen disabled as
desired. The
4 PASSENGER
AIRBAG OFF indicator
lam ponthe centr econ-
sole is lit.
or
SRS warnin glamp
6 lights up and/or
the 4 PASSENGER
AIRBAG OFF indicator
lamp does not light up
briefly when you switch
the ignition on. G
Risk of injury
There is no child seat fitted to the front-passenger seat. Automatic
child seat recognition is malfunctioning.
X Remove electronic equipment from the front-passenger seat,
e.g.
R
laptop
R mobile phone
R cards with transponde rs,s uch as ski passes or access cards
If the 4 PASSENGER AIRBAG OFF indicator lamp is still lit:
X Visit aqualified specialist workshop. Suitable positioning of the child restraint systems
Key to the letter
sused in the table:
XS eat which is unsuitable for children in this weight category.
US uitable for child rest raint systems in th eUnivers al categor ythat ar eapprove dfor use in
this weigh tcategory.
UF Suitable for forward-facing child rest raint systems that belon gtothe "Universal" categ ory
and ar eapproved for use in this weigh tcategory.
LS uitable for child rest raint systems as recommended, see th efollowin gtable of "Recom-
mended child restraint systems "(Ypage 58). 56
Children in th
evehicleSafety

Seat positions
Weigh
tcatego-
ries Front-passenger seat Rear seat
Front-
passenger air-
bag is no
tdisa-
bled: The front-
passenger air-
bag is disa-
bled
2 Left
,right Centre
Grou
p0:upto
10 kg X U, L U U
Group 0+: up
to 13 kg
X U, L U U
Group I:
9to
18 kg UF U, L U U
Group II: 15 to
25 kg UF U, L U U
Group III: 22 to
36 kg UF U, L U U
"Universal" category child restraint systems can be recognised by their orange approval label.
Approval label on the child restrain
tsystem (example)
Key to the letters used in the table:
XI SOFIX position tha tisnot suitable for ISOFI Xchild restraint system sinthis weight cat-
egory and/or size category.
IU FS uitable for forward-facing ISOFIX child seat securing systems that belong to the "uni-
versal" category which are approved for use in this weigh tcategory.
IL Suitable for ISOFI Xchild restraint system sasrecommended; see the following table of
"Recommended child restraint systems" (Y page 58).
2 Vehicles with automatic chil dseat recognition on the front-passenger seat: achild restraint system of the
"Universal" category with atransponde rfor automatic child seat recognition must be fitted. The 4
PASS ENGER AIRBAG OFF indicator lamp must be lit. Children in the vehicle
57Safety Z