ABS MERCEDES-BENZ M-Class 2012 W166 User Guide

road
,wea ther andtraffic conditions permit.In
some jurisdictions, itis forbid denfordrivers
to use mobil ephones whiledrivi ng.
Only opera teCOMAND (Cockpit Manag ement
and Data System) incompli ancewithalllega l
requ irements andwhen theroad ,wea ther and
traffic conditions permit.Youmay otherwi se
not beableto observe thetraffic conditions,
endange ringyourself andothers.
Reme mberthatyourvehicle coversa distanc e
of 44 feet (approximately 14m)asecon d
when itis travelin gat only 30mph
(approximately 50km/ h).
Drive sensibly –save fuel Obse
rvethe followi ngtips tosave fuel:
X The tires shouldalwa ysbe infla tedtothe
recomme ndedtirepres sure.
X Re move unneces saryloads.
X Re move roofcarrierswhe nthey arenot
needed.
X Warm upthe engine atlow engine speeds.
X Avoid frequent acceleration orbraking.
X Have allmaintenanc ework carried outas
indicated bythe service intervals inthe
Service Booklet orby the service interval
displa y.
Fuel consumption alsoincreases when
driving incold weather, instop-and- gotraffic
and inmountainous terrain.
Drinking anddriving G
WARNING Drink
ingand driving and/or takingdrugsand
driving arevery dangerous combinations.
Even asmall amount ofalcohol ordrugs can
affect yourreflexes, perceptions and
judgment.
The possibili tyof aserious oreven fatal
accident aregreatly increased whenyoudrink
or take drugs anddrive. Do
not drink ortake drugs anddrive orallow
anyone todrive whohasbeen drinking or
taking drugs.
Pedals G
WARNING Make
sureabsolu telynoobject sare
obstructin gthe pedals' rangeofmovement .
Keep thedriver's footwell clearofall
obstacles. Ifthere areany floormats or
carpets inthe footwell, makesurethatthe
pedals stillhave sufficient clearance.
During sudden drivingorbraking maneuvers,
the object scould getcaught between the
pedals. Youcould thennolonger brakeor
accelerate. Thiscould leadtoaccidents and
injury.
Rolling withtheengine switched off G
WARNING There
isno power assistance forthe steering
and thebrake whentheengine isnot running.
Steerin gand braking requires significantly
more effort andyoucould losecontrolofthe
vehicle andcause anaccident asaresult.
Do not turn offthe engine whilethevehicle is
in motion.
Exhaust check G
WARNING Inhalation
ofexhaust gasishazardous toyour
health. Allexhaust gascont ains carbon
monoxide (CO),andinhaling itcan cause
unconsc iousness andpossible death.
Do not run theengine inconfin edareas (such
as agarage) whicharenot properly ventilated.
If you think thatexhaust gasfumes are
enterin gthe vehicle whiledriving, havethe
cause determined andcorrect ed
immediately. Ifyou must driveunder these
condition s,drive onlywith atleast one
window fullyopen atall times. 158
Driving
tipsDriving and parking

Cert
ainengin esyst ems aredesi gned tokeep
th eleve lof pois onous compo nentsin ex haust
fum eswit hin legal limits.
Thes esyst ems onlywork atpeak efficie ncy
when they are main tainedex act lyin
acc ordanc ewit hth eman ufacturer's
spec ifications.Fo rthis reason, allwork onthe
engine mustbecarried outonly byqual ified
and authorized Mercedes-Ben ztechn icians.
The engin esett ings must notbechanged in
any circumstan ces.Furthermor e,all specific
servic ework must becarried outatregular
int ervals andinaccor dance withthe
Mercedes- Benzservic erequirement s.Det ails
can befound inthe Serv iceBook let. Engine
oil
! Vehicles withadiesel particle filter:
If the vehic leismost lydriven forshort
distan ces,itis possible thatmalfun ctions
may occurduring theautomat icclean ingof
the diesel particle filter. This canlead to
engin edamage. Therefore,ifyou frequen tly
drive short distan ces,make suretodrive
on highways orinter- urban roadsfor20
minut esatleast every 310miles (500km). Br
akes
Imp ortant safet ynotes G
WARN
ING On
slippery roadsurfac es,nev erdowns hiftin
order toobtain brakingact ion. This could
result indrive wheel slipand reduce dvehic le
con trol. Your vehic le'sABSwill notpreve nt
this type ofloss ofcon trol. G
WARN
ING Make
surethatyoudonot endan gerother
road users whenyouapply thebrake s. Downhill
gradient s !
Onlong andsteep gradien ts,you must
reduce theload onthe brake sby shift ing
early toalower gear.Thisallows youtotak e
advant ageofthe engin ebrakin geffe ctand
helps avoidoverheatin gand excessive
wear ofthe brake s.
When youtakeadvant ageofthe engin e
brakin geffe ct,a drive wheel maynotturn
for some time,e.g. onaslippery road
surfac e.This could cause damage tothe
drive train. This type ofdamage isnot
cov ered bythe Merc edes- Benzwarrant y.
Hea vyand lightload s G
WAR
NING De
pre ssin gth ebrak epedal constant lyres ults
in ex ces siveand premat urewear tothebrak e
pads.
It may alsocauseth ebrak estoove rheat,
ser iously impairingth eir effect iven ess.Itm ay
th en notb epossible tostop thevehicle in
sufficien ttime toavoid anacciden t.
If the brakes havebeen subject edtoaheavy
load, donot stop thevehicle immediately, but
drive onfor ashort while. Thisallows the
airflow tocool thebrakes morequickly.
Wet roads G
WARN
ING Aft
erdriving inheavy rainforsome time
without applying thebrakes orthro ugh water
deep enough towet brake compon ents,the
first braking actionmaybesomewhat
reduced. Youhave todepress thebrake pedal
more firmly. Maintain asafe distanc efrom
vehicles infron t.
Aft erdriving onawet road orhaving the
vehicle washed, brakefirmlywhilepaying
atten tiontothe traff iccon ditions .This will
warm upthe brake discs, thereby dryingthem
more quickly andprotec tingthem against
corr osion. Driving
tips
159Driving and parking Z

Winter
driving
Gene ralnote s G
WARNING If
the vehicl ebecome strappe din snow,
ensure thatsnow iskept away from the
exhau stpip eand from aroundthe vehicl eas
long asthe engine isrunning. Otherwise,
poi sonou scarbo nmonoxide (CO)mayenter
the vehicle, resulting inloss ofconsc iousness
and even death.
To assure sufficient freshairvent ilation, open
a window slightlyonthe side ofthe vehicle
not facing thewind.
At the onset ofwinter, haveyourvehicle
winterproof edataquali fiedspecialist
workshop, e.g.atan authorized Mercedes-
Benz Center. i
Vehicles
withadiesel engine: donot
cover theradiator, e.g.with aprotec tive
cover. Themeasuring functionofthe
Onboard Diagnosis Systemmayotherwise
provide inaccurate values.Someofthese
values arerequired bylaw and must
therefor ealwa ysbe accurate.
Driving withsumm ertires Observe
thenotesinthe "Winter operation"
section (Ypage 352).
Slippery roadsurfa ces G
WARNING The
outside temperature indicatorisnot
designed toserve asan ice-warnin gdevice
and istherefor eunsuitable forthat purpose.
Indicated temperatures justabove the
freezin gpoint donot guarantee thattheroad
surface isfree ofice. The road maystillbeicy,
especially inwooded areasoron bridges. G
WARNING On
slippery roadsurfaces, neverdownshift in
order toobtain braking action.Thiscould result
indrive wheel slipand reduced vehicle
cont rol.Your vehicle's ABSwillnotprevent
this type ofloss ofcont rol.
Drive particularly carefullyonslippery road
surfaces. Avoidsudden acceleration, steering
and braking maneuvers. Donot use thecruise
cont rolorDIS TRONIC PLUS.
If the vehicle threaten sto skid orcann otbe
stopped whenmoving atlow speed:
X Shift thetrans mission toposition N. i
For
more informat ionondriving with
snow chains, see(Ypage 353). G
WARNING Make
surethatyoudonot endanger other
road users whenyouapply thebrakes. Off-r
oaddriving
Import antsafety notes G
WARNING Grains
ofsand, particles ofdirt and other
abrasive materials canenter thebrake
system. Thiscanlead toexcessive wearand
unpredictable brakingefficienc y.
Aft erthe brakes havebeen exposed todirty
condit ions,havethem check edand cleaned
at aquali fiedspecialist workshop, e.g.an
authorized Mercedes-B enzCenter.
Otherwise, thereisarisk that braking power
may beinsufficient inthe event ofan
emergenc y,or that thebraking effectmaybe
unpredictable. G
WARNING Do
not load items onthe basic carrier bars.It
may cause instability duringsomemaneuvers
which couldresult inan accident .
Drive slowly inunkn ownterrain. Thiswill
make iteasier torecogn izeunexpect ed
obstacles andavoid damage tothe vehicle.
To help avoid thevehicle rollingover,never
turn itaround onsteep inclines. Ifthe vehicle 162
Driving
tipsDriving and parking

cannot
complete the attem ptedclimb, back it
dow ninr everse gear.
Do not drive along theside ofaslope. The
vehicle mightotherwiserollover. Ifin doing so
the vehicle beginstoshow aten dency toroll,
immediately steerintoaline ofgravity
(straight upordownhill).
Never letthe vehicle rollbackwards inidle.
You may losecontrol ofthe vehicle ifyou use
only theservic ebrake. Forinfor mation on
driving downhill, see"Drivin gdownhill". G
WARN
ING Vehicles
withairsuspension program:Please
be aware thatbyraising thevehicle level,the
cent erofgravity alsorises. Therefor e,alway s
ensure thatthevehicle levelisas low as
possible. Withhigher rideheight theESP®
may activat eearlier incert ainsituation s. G
WARN
ING Do
not reduce thetire inflation pressure
before driving through sand. However, ifyou
do so, remember tocorr ectthe tire inflation
pressure beforecontinuin gyour trip.Drivin g
with reduced tireinflation pressure increases
the risk oflosing control ofthe vehicle and
rolling over.
General notes Read
thissect ioncarefully beforedriving your
vehicle off-road. Practicebydriving overmore
gent leoff- road terrainfirst .
Familiarize yourselfwiththecharact eristics
of your vehicle andthegear shiftoperation
before driving through difficult terrain.
The following drivingsystems arespecially
adapted tooff- road driving:
R Off- road ABS(Ypage 61)
R AIRMA TICpackage (vehiclelevel)
(Y page 180)
R DS R(Downh illSpeed Regulation)
(Y page 208) Observe
thefollowing notes:
R Stop the vehicle beforestartingtodrive
along anoff- road route.
R For vehicles withAIRMA TICpackage:
select avehicle levelthatissuitable forthe
off- road terrain. Make surethere isalway s
sufficien tground clearanc eto preven t
damage tothe vehicle.
R Check thatitems ofluggage andloads are
stowed safelyandarewell secured
(Y page 288).
R Always keeptheengine runningand ingear
when driving onadownhill gradient.
Ac tivat eDS R(Ypage 208).
R Always keepthedoors, tailgate, windows
and sliding sunroof closedwhiledriving.
R Adapt yourspeed tothe terrain. The
rougher, steeperormore rutsonthe
terr ain, theslower yourspeed should be.
R Driv eslowly andatan even speed through
the water. Ensure thatabow wave doesnot
form asyou drive.
R Driv ewith extreme careonunkn ownoff-
road routes wherevisibility ispoor. For
safety reasons ,get out ofthe vehicle first
and survey theoff-road route.
R Look outforobstac lessuch asrock s,holes,
tree stumps andfurrows.
R Check thedepth ofwater before fording
rivers andstreams.
R When fording,do not stop anddonot
switc hoff the engin e.
R On sand, drivequickly tooverc omethe
rolling resistance. Otherwise, thevehicle
could digitself intothe sand.
R Do not jump withthevehicle asthis will
int errupt thevehicle's propulsion.
R Always keeptheengin erunn ingand ingear
when drivingon aslope.
R Do not shift theautomatic transmission to
tran smission positionN. Driving
tips
163Driving and parking Z

This
style ofdriving prevent s:
R the vehicle fromlifting offthe ground onthe
brow ofahill
R the vehicle fromtraveling tooquickly down
the other side
Driving downhill R
Drive slowly.
R Do not drive atan angle down steep
inclines. Steer into theline offall and drive
with thefron twheels aligned straight.
Otherwise, thevehicle couldslipsidewa ys,
tip and rollover.
R Before tackling steepdownhill gradients,
select shiftrange 1.
R Act ivate DSR. Ifthis isnot sufficient, brake
gently. Whendoingso,make surethatthe
vehicle isfacing inthe direction ofthe line
of fall.
R Check thatthebrakes areworking normally
after along downhill stretch. i
The
special off-road ABS settin genables
a precise, briefandrepeated lockingofthe
front wheels, causing themtodig into the
loose earth. Beaware thatthefront wheels
easily skidacross theground surface if
completely brakedandtherefore losetheir
abili tyto steer. Driving
systems Cruise
control
Import antsafety notes G
WARNING The
cruise controlisaconven iencesystem
designed toassist thedriver during vehicle
operation. Thedriver isand must always
remain responsible forthe vehicle's speed
and forsafe brake operation.
Only usethecruise controlifthe road, traffic,
and weather condition smake itadvisabl eto
travel ataconst antspeed. R
The useofthe cruise controlcan be
dangerous onwinding roadsorinheavy
traffic because condition sdo not allow safe
driving ataconst antspeed.
R The useofthe cruise controlcan be
dangerous onslippery roads.Rapid
changes intire tract ioncan result inwheel
spin andloss ofcont rol.
R Deactivate thecruise controlwhen driving
in fog.
The "Resu me"funct ionshould onlybe
operated ifthe driver isfully aware ofthe
previously setspeed andwishes toresume
this particular presetspeed. G
WARNING The
cruise controlbrakes automatically so
that thesetspeed isnot exceeded.
General notes Cruise
controlmaintains aconst antroad
speed foryou. Itbrakes automatically inorder
to avoid exceeding thesetspeed. Onlong and
steep downhill gradients, especiallyif the
vehicle isladen ortowing atrailer, youmust
select shiftrange 1,2or 3in good time. By
doing so,you willmake useofthe braking
effect ofthe engine, whichrelieves theload
on the brake system andprevents thebrakes
from overheating andwearing tooquickly.
Use cruise controlonly ifroad andtraffic
condition smake itappropriate tomaintain a
steady speedforaprolonged period.Youcan
set any road speed above20mph
(30 km/h). i
Cruise
controlshould notbeactivated
during off-road driving. Driving
systems
167Driving and parking Z

Sid
evie w Top
view
Fro ntsenso rs Ce
nter Appr
oxim ately40 in
(a ppr oxim ately100 cm) Co
rners Appr
oxim ately24 in
(a ppr oxim ately60 cm) Rear
senso rs Ce
nter Appr
oxim ately48 in
(a ppr oxim ately120 cm) Co
rners Appr
oxim ately32 in
(a ppr oxim ately80 cm) !
Whe npark ing,pay particular attentio nt o
object sabove orbelow thesensors, such
as flower potsortrailer drawbars.
PARKTRONIC doesnotdetect suchobject s
when theyareinthe immediate vicinityof
the vehicle. Youcould damage thevehicle
or the object s.
The sensors maynotdetect snowandother
object sthat absorb ultrasonic waves. Ultrasonic
sourcessuchasan automatic
car wash, thecompressed- airbrakes ona
truck orapneumatic drillcould cause
PARKTRONIC tomalfunct ion.
PARKTRONIC maynotfunct ioncorrec tlyon
uneven terrain.
Minimum distance Center Approx
imately 8in
(approx imately 20cm) Corne
rs Appr
oxim ately 6in
(approx imately 15cm) If
ther eis an obst acle within thisrange ,the
relevan twarn ing displ ayslight upand a
warn ingtone soun ds.Ifth edist ancefalls
below themin imum ,th edist ancemay no
lon ger besho wn.
Wa rning displa ys The
warn ingdispl aysshowthedist ance
bet ween thesen sorsand theo bstac le.The
warning displayforthe fron tarea isloca ted
on the dashboa rdabo vethe center airvents.
The warning displayforthe rear area isin the
roof lamp inthe rear compartment. Warning
displayforthe front area
: Segments onthe left-hand sideofthe
vehicl e
; Segments onthe right-hand sideofthe
vehicl e
= Segments showingopera tional readiness
The warning displayforeach sideofthe
vehicl eis divi ded into fiveyellow and twored 184
Drivi
ngsystemsDriving and parking

R
you swit chon thetur nsignals .Int his event,
the warnings aresuppressed foracertain
period oftime.
R adriving safetysystem interven es,such as
ABS ,BAS orESP ®
.
Adapt ive
If Adaptive is
selected, nowarning vibration
occurs if:
R you switch onthe turn signals. Inthis event,
the warnings aresuppressed foracertain
period oftime.
R adriving safetysystem interven es,e.g.
ABS ,BAS orESP ®
.
R you accelerate hard,e.g.kickdown.
R you brake hard.
R you steer actively, e.g.swerve toavoid an
obstacle orchange lanequickly.
R you cutthe corner onasharp bend.
In order thatyouarewarned onlywhen
necessary andingood timeifyou cross the
lane marking, thesystem recogniz escertain
condition sand warns youaccordingly.
The warning vibration occursearlierif:
R you approach theouter lanemarking ona
bend.
R the road hasvery wide lanes, e.g.a
freeway.
R the system recogniz essolid lanemarkings.
The warning vibration occurslaterif:
R the road hasnarrow lanes.
R you cutthe corner onabend. Active
Driving Assistance package
General notes The
Active Driving Assistanc epackage
consist sof DIS TRONIC PLUS(Ypage 169),
Act ive Blind SpotAssist (Ypage 202)and
Act ive Lane Keeping Assist(Ypage 205). Active
BlindSpotAssist Import
antsafety notes
Act ive Blind SpotAssist usesaradar sensor
system tomonitor theside areas ofyour
vehicle whichareinback ofthe driver. A
warning displayin the exterior mirrorsdraws
your attent iontovehicles detectedinthe
monitored area.Ifyou then switch onthe
corresponding turnsignal tochange lane,you
will also receive anoptical andaudible
collision warning. Ifarisk oflateral collision
is detect ed,correct ivebraking mayhelp you
avoid acollision. Tosupport thecourse-
correct ingbrake application, Active Blind
Spot Assist alsouses theforward-facing radar
sensor system. Active Blind SpotAssist
supports youfrom speeds ofapproximately
20 mph (30km/h). G
WARNING Act
ive Blind SpotAssist isonly anaid, and
may detect vehicles/obstacles incorrectlyor
not atall.
The system maybeimpaired ormay not
funct ionif:
R there ispoor visibili ty,e.g. due tosnow,
rain, fogorspray.
R the rear and/or frontsensors aredirty.
Act ive Blind SpotAssist maynotdetect
narrow vehicles, suchasmotorc yclesor
bicycles, ormay onlydetect themtoolate. It
cannot detectvehicles thatareovertaken at
a small distance andthen enter theblind spot
area.
Act ive Blind SpotAssist cannot detectroad
and traffic condition s.Itis not asubstitute for
attent ivedriving. Youareresponsible forthe
vehicle's speed,braking ingood time, and
steering correctly.Always adaptyourdriving
style tosuit theprevailing roadandweather
condition s.Always payattent iontotraffic
condition sand your surroundings. Otherwise,
you may failtorecogniz edangers intime,
cause anaccident andinjure yourself and
others. 202
Driving
systemsDriving and parking

G
WARNING Active
LaneKeepi ngAssist doesnotkeep
you rvehicle inits lane. Itis only anaid
designed toassist driving. Itis not asubstit ute
for atten tivedriving. Insome cases, thelane-
corr ecting brake application isnot sufficien t
to bring yourvehicle backtothe original lane.
In such cases, youmust steer thevehicle
yourself toensure thatitdoes notleave the
lane.
Act ive Lane Keeping Assistdoesnotdetect
road andtraff iccon ditions .Always makesure
that thereissuffic ientdistanceto the side for
oth ertraffic orobst acles. Inrare cases ,
unc lear mark ingsorpart icular struct ures on
the roadway canberec ogn ized assolid lane
mark ings.Aninap propriate brakeapplica tion,
e.g .after intentional lydrivi ngover asoli dlane
marking, maybeinterrup tedatany time by
steering slightly inthe oppo sitedirection.
Active LaneKeepingAssist cannot take
wea ther conditio nsinto accou nt.
You arerespo nsiblefor the drivi ngat
app ropri atespee ds,braki ngingood time, and
steering correctly .Always adapt yourdrivin g
style tosuit theprev ailing roadandweathe r
con dition s.Always payattent ion totraffic
con dition sand your surro undin gs.Oth erwise,
you may failtorec ogn izedanger sin tim e,
cause anacc ident andinjure yourself and
oth ers.
No lane- correctingbrak eapplication occurs
if:
R you clearly andactiv elysteer ,brake or
acceler ate.
R you cutthe corn eron asharp bend.
R you switc hon the turn signals.
R adrivin gsafety system interven es,e.g.
ES P®
,PRE-S AFE®
Brak eor Active Blind
Spot Assist .
R you have adopted asport ydrivin gstyle with
high cornering speeds orhigh rates of
acceler ation. R
on vehicles withatrailer towhitch,the
elect ricalconnection tothe trailer hasbeen
corr ectlyestablished.
R ES P®
is switc hedoff.
R the tran smission isnot inposition D.
R the off-road program isswitc hedon.
R aloss oftire pressure oradefect ivetire has
been detec tedand displayed.
Ac tive Lane Keeping Assistdoesnotdetec t
traf ficsituation sor road users. An
inappropriat ebrake application maybe
int errupt edatany time ifyou:
R steer slightly inthe opposite direction.
R use aturn signal.
R clearly brakeoracceler ate.
Al ane -corr ect ing brak eapplic ationis
int errupt edautom atically if:
R adrivin gsafet ysyst eminterve nes,e.g.
ES P®
,PRE- SAFE®
Br ake orActiveBlin d
Spot Assist.
R lane mark ingscannolong erbe rec ogn ized.
Switch ingonActive LaneKeeping Assist X
Swit chon ActiveLane Keepin gAss istusing
the on-board computer ;to do so, selec t Stan
dard or Adap
tive (Y
page 233).
Symbo l: appears inthe mult ifunc tion
display.
If Stan
dard is
selec ted,nowarnin g
vibrat ionoccurs if:
R you switc hon the turns ignals .Int his
event, thewarnings aresuppressed fora
certain periodoftime.
R adriving safetysystem interven es,such
as ABS ,BAS orESP ®
.
If Adaptive is
selected, nowarning
vibration occursif: Driving
systems
207Driving and parking Z

R
you switchon thetur ns ignals .Int his
event, thewarnings aresuppressed fora
certain periodoftime.
R adriving safetysystem interven es,e.g.
ABS ,BAS orESP ®
.
R you accelerate hard,e.g.kickdown.
R you brake hard.
R you steer actively, e.g.swerve toavoid
an obstacle orchange lanequickly.
R you cutthe corner onasharp bend.
Tra iler towing
When youattach atrailer, makesureyouhave
correct lyestablished theelectrical
conn ection. Thiscanbeaccomplished by
check ingthe trailer lighting. Off-r
oaddriving systems 4MATIC
(permanentfour-wheel drive)
4MATIC ensuresthatallfour wheels are
permanent lydriven. Together withESP®
and
4ETS, itimproves thetract ionofyour vehicle
whenever adrive wheel spinsdueto
insufficient grip. G
WARNING If
adrive wheel isspinning duetoinsufficient
tract ion:
R While driving off,apply aslittle throttleas
possible.
R While driving, easeupon the accelerator
pedal.
R Adapt yourspeed anddriving styletothe
prevailing roadcondition s.
Failure toobserve theseguidelinescould
cause thevehicle toskid.
The 4MATIC cannotprevent accidents
resulting fromexcessive speed.
! Never towthevehicle withoneaxle
raised. Thismay damage thetransf ercase.
Damage ofthis sort isnot covered bythe
Mercedes-Ben zLimited Warranty. All
wheels mustremain eitheronthe ground or
be fully raised. Observe theinstruct ions
for towing thevehicle withallwheels infull
cont actwith theground. i
In
wintry driving condition s,the maximum
effect of4MATIC canonly beachieved if
you usewinter tires(M+S tires ),wi th snow
chai nsifnecessa ry.
! Function orperfo rmance testsmayonly
be perfo rmed ona2-axle dynamome ter.If
you wish tooper atethe vehi cleonsuch a
dy namome ter,please consul tan
auth orizedMer cedes-Ben zCent er
beforehan d.You could otherwisedamage
the drive trainorthe brake system.
For infor mation aboutdriving off-road, see
(Y page 162). DSR
(Dow nhillSpeed Regulat ion)
Impor tantsafet ynotes DS
Rassists youwhen driving downhill. It
keeps thespeed oftravel atthe speed seton
the on-board comput er.The steeper the
downhill gradient,the greater theDSR
brakin geffec tonthe vehicle. Whendriving on
flat stret ches ofroad oron anuphill gradient,
the DSR braking effectisminimal ornon-
existent . G
WARNING Downhill
SpeedRegulation (DSR) isa
conven iencesystem designed toassist the
driver during vehicle operation. Thesystem
settin gmust beappropriate tothe
topographical andweather condition s
encount ered,which canchange quickly. The
driver isresponsible forthe vehicle speedand
for safe brake operation atall times.
Depending onthe programmed speed,actual
vehicle speedandgradient, switching onDSR
while driving cancause thevehicle toslow
down rapidly ,and youmay hear asound,
caused bythe activation ofthe vehicle's brake
system through DSR.Sudden andunexpected
deceleration canresult inloss ofvehicle 208
Off-r
oaddriving systemsDriving and parking

Safety
systems Display
messages Possible
causes/co nsequences andM Solutions
!÷
Currently
Unavailable
See Operator's
Manual G
Risk
ofaccident ABS
(Anti-lock Braking System), ESP®
(Electr onicStability
Program), BAS(Brake Assist), PRE-SAFE®
,the HOLD function,hill
start assist andESP®
trailer stabilization aretemporarily
unvailabl e.
BAS PLUS andPRE-SA FE®
Brake mayalsohave failed.
In addition, the÷, åand! warning lampslightupin
the instrumen tcluster.
The self-diagnosis functionmight notbecomplete, forexample.
ATTENTI ONASS ISTisdeactivated.
The brake system continues tofunct ionnormally, butwithout the
funct ionslisted above. Thewheels couldtherefore lockifyou
brake hard,forexample.
X Carefull ydrive asuitable distance makingslightsteering
movement sat aspeed above12mph (20km/ h).
If the display message disappears,the funct ionsment ioned
above areavaila bleagain.
If the display message continues tobe display ed:
X Drive oncarefully.
X Visit aqual ified specialist workshop. G
Risk
ofaccident ABS
,ESP ®
,BAS ,PRE-SA FE®
,the HOLD function,hillstart assist
and ESP®
trailer stabilization aretemporarily unavailable.
BAS PLUS andPRE-SA FE®
Brake mayalsohave failed.
In addition, the÷, åand! warning lampslightupin
the instrumen tcluster.
For example, theon-board voltagemaybeinsufficient .
ATTEN TIONASSISTisdeactivated.
The brake system continues tofunct ionnormally, butwithout the
funct ionslisted above. Thewheels couldtherefore lockifyou
brake hard,forexample.
X Drive oncarefully.
If the display message disappears,the funct ionsment ioned
above areavaila bleagain.
If the display message continues tobe display ed:
X Drive oncarefully.
X Visit aqual ified specialist workshop. Display
messages
239On-board computer and displays Z