GAWR(Gross Axle WeightR ating)
(definition) .................................... .284
GTW (Gross Trailer Weight) (defi-
nition) ............................................ 284
GVW (Gross Vehicle Weight) (def-
inition) ...........................................2 85
GVW R(Gross Vehicle Weight Rat-
ing) (definition) .............................. 285
Important safety notes .................. 267
Increase dvehicle weight due to
optional equipment (definition) ...... 284
Information on driving .................... 267
Kilopascal (kPa)( definition) ........... 285
Labeling (overview )........................ 281
Loadb earing index (definition) ...... 286
Loadi ndex ..................................... 283
Loadi ndex (definition) ................... 285
M+S tire s....................................... 269
Maximu mloadona tire (defini-
tion) ............................................... 285
Maximu mloaded vehicleweigh t
(definition) ..................................... 285
Maximu mpermissibl etire pres-
sure (definition) ............................. 285
Maximu mtire load ......................... 283
Maximu mtire load (definition) ....... 285
Optionale quipmentweight (defi-
nition) ............................................ 285
PSI (pounds pe rsquare inch )(de f-
inition) ........................................... 285
Replacing ....................................... 286
Service life ..................................... 268
Sidewal l(de finition) ....................... 285
Snow chains .................................. 270
Speed rating (definition) ................ 284
Storing ........................................... 286
Structure and characteristics
(definition) ..................................... 284
Summer tire s................................. 269
TIN (Tire Identification Number)
(definition) ..................................... 286
Tire bead (definition) ...................... 285
Tire pressure (definition) ................ 285
Tire pressures (recommended )...... 284
Tire size (data )............................... 290
Tire size desi
gnation, load-bearing
ca
pacity, speed rating .................... 281
Tire trea d....................................... 268 Tire trea
d(definition) ..................... 285
Tota lloa dlim it (definition) ............. 286
Tractio n(definition) ....................... 286
TWR (permissibl etraile rdrawbar
noseweight) (definition) ................. 286
Uniform Tire Quality Grading
Standard s(de finition) .................... 284
Wea rindicator (definition) ............. 286
Wheel and tire combination ........... 291
Wheel rim (definition) .................... 284
Top Tether ............................................ 59
Tow-starting
Emergency engine starting ............ 266
Important safety notes .................. 264
Towing
If the vehicl eisstuck ..................... 266
Installing/removing the towing
eye. ................................................ 265
Towin gatrailer
Active Parking Assist ..................... 154
Axle load ,permissibl e.................... 305
Cleaning the traile rtow hitch ......... 258
Coupling up atraile r...................... 165
Decoupling atraile r....................... 166
Driving tip s.................................... 162
Note sonr etrofitting ...................... 305
Power supply ................................. 167
Trailer load s................................... 305
Towin gaway
Important safety guideline s........... 264
With both axles on the ground ....... 266
With the rea raxler aised ................ 265
Towin geye......................................... 260
Trailer coupling
see Towing atrailer
Trailer loads and drawbar nose-
weights ............................................... 166
Trailer operation
Lights display messages (vehicle
with steering wheelb uttons) ......... 208
Lights display messages (vehicle
withou tsteering wheelb uttons) .... 194
Trailer towing
Blind Spot Assist ............................ 147
ESP
®................................................ 65
PARKTRONIC ................................. 153
Index21
Mountingawheel .......................... 287
Removing awheel .......................... 288
Removing and mounting the spare
wheel ............................................. 292
Snow chains ..................................2 70
Storing ...........................................2 86
Tightening torque. .......................... 289
Wheels ize/tire size ....................... 290
Windo wcurtain air bag
Display message (vehicle with
steering wheel buttons) ................. 208
Display message (vehicle without
steering wheel buttons) ................. 194
Operation ......................................... 50
Windows
see Side windows
Windshield
Cleaning ......................................... 256
Defrosting ...................................... 114
Windshiel dwashe rfluid
Adding ...........................................2 46
Windshiel dwiper
Setting the sensitivity of the rain
sensor (vehicle with steering
wheel buttons) ............................... 187
Setting the sensitivity of the rain
sensor (vehicle without steering
wheel buttons) ............................... 174
Windshiel dwiper
see Windshield
Windshiel dwipers
Problem (malfunction) ................... 106
Rea rwindow wiper ........................ 102
Replacing the wiper blades ............ 103
Switching on/off ........................... 101
Winte rdriving
Slippery road surfaces ................... 138
Snow chains .................................. 270
Winte roperation
General notes ................................ 269
Radiator cover ................................. 31
Winte rtires
M+S tires ....................................... 269
Setting alimit speed. .....................1 35
Wiper blades
Cleaning ......................................... 256
Important safety notes .................. 103
Replacing (rearw indow) ................ 104 Replacing (windshield).
.................. 103
Service indica tor ............................ 103
Wo rk
shop
see Qualifie dspecialist workshop
24Index
the electricslidin gdoorusing the corresponding
Å orÆ sliding door button in the center
consol e(
Ypage 75).
Pets in the vehicle
GWARNING
If yo uleave animals unattended or unsecured
in the vehicle, theyc ould press buttons or
switches ,for example.
As aresult, theyc ould:
Ractivate vehicl eequipment and become
trapped ,for example
Ractivate or deactivate systems, thereby
endangering othe rroa du sers
Unsecured animals could also be flung around
the vehicl einthe event of an accident or sud-
de ns teering or braking ,thereb yinjurin gvehi-
cle occupants. There is ariskofana ccident
and injury.
Never leav eanimals unattended in the vehi-
cle .Alway ssecurea nimals properly during
the journey ,e.g.u se asuitabl eanimalt rans-
port box.
Driving safety systems
Overview
In thiss ection, yo uwillf indi nformation about
the following drivin gsafety systems:
REBD ( Ele ctronic Brake Force Distribution)
RABS ( Anti-lock Braking Sys tem)
RBAS ( Brake Assist System)
RESP®(E le ctronic Stability Program)
Important safety notes
If yo ufailtoa dapt your drivin gstyle or if yo uare
inattentive, the drivin gsafety systems can nei-
therr educe the ris kofaccident nor override the
laws of physics .Drivin gsafety systems are
merel yaidsd esig nedtoa ssistdriving. Yo uare
responsibl efor the distance to the vehicl ein
front, for vehicl espeed, braking in good time
and for staying in your lane. Alway sadapt your drivin
gstyle to the prevailing roa dand weather
conditions and maintain asufficient, safe dis-
tance fromo therroa du sers.D rive carefully.
Please note thatt he drivingsafety systems
describe donlyw orko ptimally when:
Rthere is adequate contact between the tires
and the roa dsurface
Ryo uu sewinter tire s(M+ Stires),w iths now
chains if necessary,w hent he roa dconditions
ar ew intry
Rthe spee dinformation determine dbythe
vehicl eiswithint he legall yprescribe ddisplay
accuracy
Pa yp articular attentio ntothe information
regarding tires, coding of the whee lsizeg roups,
tire trea dand winter operatio nunder "Wheels
and tires" (
Ypage 267).
ABS (Anti-lock Braking System)
General notes
ABS regulate sbrake pressure in such awaythat
the wheels do not lock when yo ubrake. This
allows yo utocontinue steering the vehicl ewhen
braking.
The ò warning lamp in the instrument cluster
lights up when the ignition is switched on. The
lamp goes ou twhent he engine starts running.
Important safety notes
Observe the important safety guideline sfor the
drivin gsafety system(Ypage 62).
ABS works fromas peedof abou t5mph
(8 km/h), regardles sofroad-surface conditions.
ABS works on slippery surfaces ,evenw heny ou
onl ybrake gently.
GWARNING
If ABS is faulty, the wheels could lock when
braking .The steerability an dbraking charac-
teristics maybes everel yimpaired. Addition-
ally ,fur the rdrivin gsafety systems ar edeac-
tivated .Ther eisani ncreasedd angerofs kid-
ding and accidents.
Drive on carefully. Hav eABS checked imme-
diately at aquali fied specialis tworkshop.
62Driving safet ysystems
Safety
ESP®(Electronic Stability Program)
General notes
ESP®monitors driving stabilitya nd detectsa
tendenc yofthevehicle to understeer or over-
steer (skidding) in good time. If ESP
®detects
that th evehicle is deviatin gfromt hedirection
desired by th edriver, oneorm orew heels are
braked to stabilizet hevehicle .The engine out-
put is also modified to keep th evehicle on the
desired course within physical limits. ESP
®can
also stabilizet hevehicle durin gbraking.
ESP
®also monitors traction,i .e.p ower trans-
mission between th etires and th eroad surface.
The integrate dtraction control support syou
when pullinga way or acceleratin gonwet,slip-
pery or slickr oads. Should th edrivew heels spin,
traction control brakes them individually. In
addition,g reaterdrivet orque is transmitte dto
th ew heel or wheels with traction.Ift raction on
th er oad surface is no tsufficient ,even ESP
®will
no tallow you to pull away without difficulty. The
type of tires and total weightoft hevehicle as
well as th egradientoft heroad also play acru-
cial role .Tractio ncontrol remains active if you
deactivate ESP
®.
If the h warning lamp in th einstrumen tclus-
te rg oes out before beginnin gthe journey, ESP
®
is automaticall yactive.
The h warning lamp in th einstrumen tcluster
flashes when ESP
®intervenes:
XDo no tdeactivate ESP®unde rany circum-
stances.
Xwhen driving off ,apply as little throttle as
possible.
Xadapt your speeda nd driving style to th epre-
vailin groad conditions.
Important safety notes
Observ ethe important safety guidelines for the
driving safety system (Ypage 62).
GWARNING
If ESP
®is malfunctionin gitwill notprovide
any vehicle stabilization. Thereisani ncreased
risk of skiddingorofana ccident.
Exercise caution when continuing to drive.
Hav eESP
®checked at aqualified specialist
workshop.
!Do no trun th evehicle on aroller dynamom-
eter (e.g. for performanc etests) .Ifyou must
operate th evehicle on aroller dynamometer,
please consult aqualified specialist workshop
in advance. You coul dotherwise damag ethe
driv etrain or th ebrak esystem.
If ESP
®is malfunctioning, the hwarning
lamp (Ypage 221) lightsupc ontinuously while
th ee ngine is runnin gand th edisplay showsa
message.
Ron vehicle swithout steering wheel buttons
(Ypage 193)
Ron vehicle swith steering wheel buttons
(Ypage 207)
ESP®is deactivate diftheå warning lamp in
th ei nstrumentc lusterislit when th eengine is
running.
Only use wheels with th erecommended tire
sizes. Only then will ESP
®function properly.
Deactivating/activatin gESP®
GWARNING
If you deactivate ESP
®,E SP®no longer sta-
bilizes th evehicle .Thereisani ncreased risk
of skiddinga nd an accident.
Only deactivate ESP
®in th esituations descri-
bed in th efollowing.
It may be best to deactivate ESP
®in th efollow-
ing situations:
Rwhen usings nowc hains
Rin deep snow
Ron sandorg ravel
Activate ESP®as soon as th esituations descri-
bed abovenol onger apply. Otherwise, ESP®
assistance for stabilizing th evehicle will remain
significantly reduced, even if th evehicle starts
to skid.
If you deactivate ESP
®:
Rthe å warning lamp in th einstrumen tclus-
te rlightsu p.
Rthe÷ warning lamp in th einstrumen tclus-
te rf lashes if th ewheels are spinning.
RESP®assistance for stabilizing th evehicle in
th el ower speedr ange up to approximately
37 mph (60 km/h) is significantly reduced.
Rengine torque is no longer limited and the
driv ewheels are able to spin
64Driving safety systems
Safety
If the on-board voltage is too low, the seat heat-
ing willeither switch itself off prematurely or not
come on at all .Inthis case, too many electrical
consumers are switched on or the battery
charge is not sufficient. The seat heating will
automatically switch back to the current heating
level when enough on-board voltage is available
again.
Steering wheel
GWARNING
You could lose control of you rvehicle if you do
the following whil edriving:
Radjust the driver's seat, head restraint,
steering wheel or mirrors
Rfasten the seat belt
There is arisk of an accident.
Adjust the driver's seat, head restraint, steer-
ing wheel and mirror and fasten you rseat belt
before starting the engine.
GWARNING
If the steering wheel is unlocked whil ethe
vehicle is in motion, it could change position
unexpectedly .This could cause you to lose
control of the vehicle.T here isarisk of an
accident.
Before starting off, make sure the steering
wheel is locked. Never unlock the steering
wheel whil ethe vehicle is in motion.
GWARNING
Children could injure themselves if they
adjust the steering wheel .There is arisk of
injury.
When leaving the vehicle,a lways take the
SmartKey with you and lock the vehicle.N ever
leave childrenu nsupervised in the vehicle.
The steering wheel can still be adjusted if the
key has been removed.
Adjusting the steering wheel
:
Steering column height
;Lever
XTo adjust the steering wheel: pulllever ;
up and hold it.
The steering wheel is unlocked.
XMove the steering wheel to the desiredp osi-
tion.
XLet go of lever ;.
The steering wheel engages and is locked
again.
Mirrors
Important safety notes
GWARNING
You could lose control of you rvehicle if you do
the following whil edriving:
Radjust the driver's seat, head restraint,
steering wheel or mirrors
Rfasten the seat belt
There is arisk of an accident.
Adjust the driver's seat, head restraint, steer-
ing wheel and mirror and fasten you rseat belt
before starting the engine.
GWARNING
The exterior mirror on the front-passenger
side reduces the size of the image .Visible
objects are actually closer than they appear.
This means that you could misjudge the dis-
tance from road users traveling behind, e.g.
when changing lane. There is arisk of an acci-
dent.
90Mirrors
Seats, steerin gwheel and mirrors
Cruisecontro lmaybe unab leto maintain the
storeds peedonu phillgradients .The stored
speedisr esumedifth eu phill gradiente vens out
and th evehicle 's speedd oes notfall below
20 mph (30 km/ h).C ruise control maintains the
storeds peed on downhil lgradients by automat-
icall yapplyin gthe brakes. Observe the addi-
tiona ldriving tip s(
Ypage 136).
Important safety notes
Observe the notes on braking (Ypage 136).
If yo ufailtoa dapt your driving style or if yo uare
inattentive ,cruise control can neither reduce
the ris kofana ccident nor override the laws of
physics .Cruise control canno ttake road,
weathe rand traffic conditions into account.
Cruise control is only an aid. Yo uare responsible
for the distance to the vehicl einfront, for vehi-
cle speed, for braking in goo dtime and for stay-
ing in lane.
If yo uchange wheel size ,make sure they corre-
spond to the correct wheel size category
(
Ypage 267). If the categor yischanged without
recoding the control units in the vehicle, the
functioning of cruise control may be impaired.
Do not us ecruise control:
Rin traffic conditions that are unsuitable for
driving at aconstant speed, e.g. in heavy traf-
fic, on winding roads or off-road.
Ron slippery roads. Braking or accelerating
may cause the drive wheel stoloset raction
and the vehicl ecould then skid.
Rwhen there is poo rvisibility ,e.g. du etofog,
heavy rai norsnow.
If there is achange of drivers ,make sure that
yo ui nform the new driver aboutt he set cruise
speed.
Cruise control levera nd display
:To activate and store the current speed or a
higher speed
;To activate at the last storeds peed
=To activate and store the current speed or a
lowerspeed
?To deactivate cruise control
The cruise control lever is the lowe rlev er on the
left of the steering column.
Whe nyou activate cruise control ,the display
briefl yshows the Cruise Control
message
and the storeds peed.
The display also shows the Vsymbo land the
storeds peed:
Rin the header on vehicles withou tsteering
wheel buttons (Ypage 170)
Rin the statu sareaonv ehicles with steering
wheel buttons (Ypage 176)
Activation conditions
To activate cruise control ,allof the following
activation conditions mus tbefulfilled:
Rthe parking brake mus tbereleased .The F
(onl yUSA) or J(onlyCanada) indicator
lamp in the instrument cluster goe sout
RESP®mus tbes witched on, bu tnot currently
intervening or performing acontrol action
Ryoua re driving faster than 20 mph (30 km/h)
Rthe brake pedal is not depressed
Driving systems141
Driving and parking
Z
If you change wheel size, make sure they corre-
spond to the correct wheel size category
(
Ypage 267). If the category is changed without
recoding the control units in the vehicle,t he
functioning of the distance warning feature may
be impaired. COLLISION PREVENTION ASSIST
may then detect amalfunction and switch itself
off.
Operation
XTo activate/deactivate: activate or deacti-
vate the distance warning function in the on-
board computer (
Ypage 184).
If the distance warning function of the COL-
LISION PREVENTION ASSISTisa ctivated, the
display shows the Äsymbol:
Rin the header
Rin the Status Overviewof the Assist.menu (Ypage 183)
At speedsuptoa pprox20m ph (30 km/h) the
display in vehiclesw ith Active Parking Assist
first shows the ístatus indicator. Only from
as peed of abou t20m ph (30 km/h )does the
display show the Äsymbolinstead of the
í status indicator.
The distance warning function can help you to
minimize the risk of afront-end collision with a
vehicle ahea dorreduce the effects of such a
collision. With the help of the rada rsensor sys-
tem, the distance warning function can detect
obstacles that are in the path of you rvehicle for
an extended period of time. If the distance warn-
ing function detects that there is arisk of acol-
lision, you wil lbewarned visually and, where
necessary ,acoustically.W ithout yourinterven-
tion, the distance warning function cannot pre-
vent acollision.
The distance warning function issues awarning
at speeds:
Rfrom abou t4mph (7 km/h) if you approach a
vehicle traveling in front or astationary vehi-
cle very quickly. The ·warning lamp in the
instrument cluster flashe sand an intermittent
warning tone also sounds.
At speedsuptoa bout45mph (70 km/h), the
system also detects stationary obstacles ,for
example stationary or parked vehicles.
XBrake immediately until the distance to the
obstacle increases and the risk of acollision
has passed.
or
XTake evasive action, provideditiss afe to do
so.
Adaptive Brake Assist
General notes
Adaptive Brake Assist evaluates the traffic sit-
uatio nwith the help of the rada rsensor system
and can detect obstacle swhich have been in
you rvehicle's path for an extended period of
time. From speedsa bove4mph (7 km/h), Adap-
tive Brake Assist aid syou in braking during haz-
ardou ssituations.
Up to aspeed of approximately 125 mph
(200 km/h), Adaptive Brake Assist is capable of
reacting to moving obstacle sthat have already
been detected as such at least once over the
period of observation.
Important safety notes
GWARNING
Adaptive Brake Assist does not react:
Rto peopleora nimals
Rto oncoming vehicles
Rto crossing traffic
Rto stationary obstacles
Rwhen cornering
As aresult, the Adaptive Brake Assist may not
intervene in all critical conditions. There is a
risk of an accident.
Alway spay careful attention to the traffic sit-
uatio nand be ready to brake.
GWARNING
Adaptive Brake Assist cannot always clearly
identify objects and complex traffic situa-
tions.
In such cases, Adaptive Brake Assist can:
Rintervene unnecessarily
Rnot intervene
There is arisk of an accident.
144Driving systems
Driving and parking
Alwayspaycarefu lattentio ntothe traffic sit-
uatio nand be ready to brake. Terminate the
interventio ninanon-critica ldriving situation.
In particular, the detection of obstacle scan be
impaired in the cas eof:
Rdirt on the sensors or anything else covering
the sensors
Rsnow or heavy rain
Rinterference from othe rradar sources
Rstrong rada rreflections, for example, in park-
ing garages
Ran arrow vehicl etraveling in front, e.g .a
motorbike
Rav ehicl etraveling in front on adifferent line
Due to the nature of the system ,particularly
complicate dbutnon-critica ldriving conditions
maya lsoc ause Adaptive Brake Assist to inter-
vene.
If yo ufailtoa dapt your driving style ,Adaptive
Brake Assist can neither reduce the ris kofacci-
dent nor override the laws of physics. Adaptive
Brake Assist canno ttake into account road,
weather or traffic conditions. Adaptive Brake
Assist is onlyana id.Y ou arer esponsibl efor the
distance to the vehicl einfront, for vehicle
speed ,braking in goo dtime and for staying in
your lane.
Following damage to the front end of the vehicle,
have the configuratio nand operatio nofthe
rada rsensor checked at aquali fied specialist
workshop.T hisa lsoa pplies to collisions at slow
speed swhe
re the rei
snov isible damage to the
front of the vehicle.
If yo uchange whee lsize, make sure they corre-
spond to the correct whee lsizec ategory
(
Ypage 267). If the categor yischangedw ithout
recoding the contro lunits in the vehicle, the
functioning of Adaptive Brake Assist mayb e
impaired .COL LISION PREVENTION ASSIST may
then detect amalfunctio nand switch itsel foff.
If Adaptive Brake Assist is not availabl edueto a
malfunctio ninthe rada rsensor system ,the
brake system remains availabl ewithf ullb rake
boosting effect and BAS.
Operation
With the hel pofthe rada rsensor system ,Adap-
tive Brake Assist can detect obstacle sthath ave
been in the path of your vehicl efor an extended
perio doft ime.Adaptive Brake Assist does not
react to stationar yobstacles. If Adaptive Brake Assist detects
ariskofc ollision with avehicle
traveling in front or with astationar yobstacle,
the system calculate sthe braking forc eneces-
sary to avoidt hiscollision. If yo uapply the
brakes forcefully, Adaptive Brake Assist will
automaticall yincrease the braking forc etoa
level suitabl efor the traffic conditions.
XBrake unti lthe distance to the obstacle
increases and the ris kofacollision passes.
ABS
prevents the wheels from locking.
The brakes functio nasusual againif:
Ryour elease the brake pedal
Rther eisnol ongera ny dangerofac ollision
Rno obstacle is detecte dinfront of your vehicle
Braking assistance is then ended.
Blind SpotA ssist
General notes
Blind Spo tAssist monitors the area soneither
side of the vehicl ethata renot visible to the
driver with two lateral, rear-facing rada rsensors
in the bumper. It supports yo ufrom speed sof
approximately20m ph (30 km/h).Awarning
display in the exterio rmirrors draws your atten-
tio ntov ehicles detecte dinthe monitore darea.
If yo uthen switch on the corresponding turn
signaltoc hange lane, yo uwilla lsor eceive an
optica land audibl ecollision warning.
Important safety notes
GWARNING
Blind Spo tAssist does not react to:
Rvehicles overtake ntoo closel yonthe side,
placing them in the blind spo tarea
Rvehicles which approach with alarge speed
differential and overtake your vehicle
As aresult, Blind Spo tAssist mayn ot give
warning sinsuchs ituations. There is arisko f
an accident.
Alway sobserve the traffic conditions care-
fully, and maintain asafel atera ldistance.
Blind Spo tAssist is onlyana id.Itm ayfailto
detect som evehicles and is no substitute for
attentive driving .Alway sensure thatt hereis
Driving systems145
Driving an dparking
Z