Page 57 of 261

4ETS (Electronic Traction System)
i
Observ
ethe "Important safety notes" sec-
tion (Y page 52).
4ETS traction control is part of ESP ®
.
4ETS traction control is no longer active above a
speed of approximately 60 km/h.
Traction control brakes the drive wheels indi-
vidually if they spin. This enables you to pull
awaya nd accelerate on slippery surfaces, e.g. if
the road surface is slippery on one side. In addi-
tion, more drive torque is transferred to the
wheel or wheels with traction.
Traction control remains active if you deactivate
ESP ®
.
Important safety notes i
Observe the "Important safety notes" sec-
tion (Y page 52). G
WARNING
If ESP ®
is malfunctioning, ESP ®
is unable to
stabilise the vehicle. In addition, other driving
safety systems are switched off. This increa-
ses the risk of skidding and an accident.
Drive on carefully.H ave ESP®
checked at a
qualified specialist workshop.
! Only operate the vehicl
efor am aximu mof
ten seconds on abrake dynamometer. Switch
off the ignition.
Application of the brakes by ESP ®
may oth-
erwise destroy the brake system.
! Af
unction or performance test should only
be carrie dout on atwin-axle dynamometer.
Before you operate the vehicl eonsuch a
dynamometer, please consult aqualified
workshop. You coul dotherwise damage the
drive train or the brake system.
If the å ESP®
OFF warning lamp lights up
continuously,E SP®
is deactivated.
If the ÷ ESP®
warning lamp lights up contin-
uously,E SP®
is not available due to amalfunc-
tion.
Observe the information on warning lamps
(Y page1 59) and display messages which may
be displayed in the instrument cluster
(Y page1 42). Use only wheels with the recommended tyre
sizes. Only then will ESP ®
functio nproperly.
If differential locks are switched on, ABS,B AS
and ESP ®
switch off automatically.
Characteristics of ESP ® General information
If the ÷ ESP warning lamp goes out before
you begin the journey, ESP ®
is automatically
active.
If ESP ®
intervenes,t he÷ ESP®
warning lamp
flashes on the instrument cluster.
If ESP ®
intervenes:
X Do not deactivate ESP ®
under any circum-
stances.
X When pulling away, depress the accelerator
pedalo nly as far as is necessary.
X Adapt yourd riving style to suit the prevailing
road and weather conditions.
ECO start/stop function
The ECO start/stop function switches the
engine off automaticall yifthe vehicle stops
moving. When the vehicle pulls awaya gain, the
engine starts automatically. ESP ®
remains in its
previously selected status, e.g. if ESP ®
was
deactivated before the engine was automati-
callys witched off.
Deactivating/activating ESP ® Im
portant safety notes
i Observ
ethe "Importan tsafety notes" sec-
tio n(Ypage 52).
You can select between th efollowin gESP®
sta-
tuses:
R ESP ®
is activated
R ESP ®
is deactivated G
WARNING
If yo udeactivate ESP ®
,E SP ®
no longer sta-
bilises the vehicle. There is an increased risk
of skidding and an accident.
Only deactivate ESP ®
in the situations descri-
bed in the following. 54
Driving safety systemsSafety
Page 58 of 261

It may be best to deactivate ESP
®
in the follow-
ing situations:
R when snow chains are used
R in deep snow
R on sand or gravel
R off-road
Spinning the wheelsr esults inacutting action,
which enhances traction.
Activate ESP ®
as soon as the situations descri-
bed above no longer apply. ESP ®
willo therwise
not be abletos tabilise the vehicle if the vehicle
starts to skid or awheel starts to spin.
Deactivating/activating ESP ®X
To deactivate: press button:until the
å warning lamp lights up in the instrument
cluster.
X To activate: press button :until the å
warning lamp goes out in the instrument clus-
ter.
Characteristic swhenE SP®
is deactivated
If ESP ®
is deactivate dand one or more wheels
start to spin, the ÷ESP®
warning lamp on
the instrument cluster flashes. In such situa-
tions, ESP ®
will not stabilise the vehicle.
If yo udeactivate ESP ®
:
R ESP ®
no longer improve sdriving stability
R engine torque is no longer limite dand the
drive wheels may start to spin
R tractio ncontro lisstilla ctivated
R ESP ®
stil lprovides support when yo ubrake
firmly
R and are driving at aspeed above 60 km/h,
ESP ®
stil lintervene swheno ne whee lreaches
its gri plim it eve nthough it is deactivated Trailer stabilisation General information
If you rvehicle/trailer combinatio nbegins to
lurch, ESP ®
assists you in this situation. ESP ®
slowst he vehicle down by braking and limiting
the engine outpu tuntil the vehicle/trailer com-
binatio nhas stabilised.
Important safety notes G
WARNING
If road and weather conditions are poor,
trailer stabilisation willn ot be abletoprevent
the vehicle/trailer combination from swerv-
ing. Trailers with ahigh centre of gravity can
tip over before ESP ®
can detect this. There is
ar isk of an accident.
Always adapt yourd riving style to the prevail-
ing road and weather conditions.
If yourv ehicle/trailer combination begins to
lurch ,you can stabilise the vehicle/trailer com-
bination only by depressing the brake firmly.
Trailer stabilisation is active above speeds of
about 60 km/h.
ESP ®
trailer stabilisation does not work if ESP ®
is deactivated or disabledb ecause ofamalfunc-
tion. EB
D( electronic brak eforce distribu-
tion)
General information EB
Dm onitors and controls the brake pressure
on the rea rwheel stoi mprov edrivin gstability
whil ebraking.
Important safety notes i
Observ
ethe "Important safety notes" sec-
tion (Y page 52). G
WARNING
If EBD is malfunctioning, the rear wheels can
lock, e.g. under full braking. This increases the risk of skidding and an accident.
You should therefore adapt your driving style
to the different handling characteristics. Have Driving safe
tysystems
55Safety
Z
Page 59 of 261

the brake syste
mchecked at aquali fied spe-
cialist workshop.
Observe information regarding indicator and
warning lamps (Y page 158)asw ellasd isplay
message s(Ypage 143). ADAPTIV
EBRAKE
ADAPTIV EBRAKE provides increased braking
safety. In addition to th ebraking function,
ADAPTIV EBRAKE also features th eHOLDF unc-
tion (Y page 122). Protectio
nagainst theft Immobiliser
The immobiliser prevents yourv ehiclefrom
bein gstarted without th ecorrect key.
X To activate: remove thekeyfrom th eignition
lock.
X To deactivate: switch on theignition.
When leaving th evehicle, always tak ethe key
wit hyou and loc kthe vehicle. The engin ecan be
started by anyone wit havalid ke ythatisl eft
inside th evehicle.
i The immobiliser is always deactivated when
you start th eengine. ATA (Anti-Thef
tAlarms ystem) X
To prime: lockthe vehicl ewitht he key.
Indicato rlamp :flashes. The alarm system
is primed afte rapproximatel y15s econds.
X To deactivate: unlock the vehicl ewitht he
key. i
If you then do not open
aside door or the
rear door, the alarm system is primed again
after approximately 40 seconds.
Av isuala nd audible alarm is triggered if the
alarm system is primed and you open:
R ad oor
R the vehicle with the emergency key element
R the rear door
R the bonnet
The alarm is also triggered if:
R the positio nofthe vehicle is changed
R The alarm does not stop, even if you close the
open door that has triggered it, for example.
X To stop the alarm: press the%or&
button on the key.
The alarm stops.
or X Insert the key into the ignition lock.
The alarm stops. 56
Protectiona
gainst theftSafety
Page 60 of 261

Key
Important safety notes
G
WARNING
If children ar eleft unsupervised in the vehicle,
they can:
R open doors and endange rother persons or
road users
R climb out and be injured by the traffic
R operate vehicl eequipment and, for exam-
ple,t rap themselves.
Childre ncoulda lsos et the vehicl einmotion,
for exampl eby:
R releasing the parking brake
R shifting the automatic transmission out of
park position P
R starting the engine.
There is arisk of an accident and injury.
When leaving the vehicle, alwayst ake the key
with you and lock the vehicle. Never leave
children unattended in the vehicle. Always
keep the key out of reach of children. G
WARNING
If you attach heavy or larg eobjects to the key,
the key coul dbeunintentionally turned in the
ignitio nlock. This coul dcauset he engine to
be switched off. There is arisk of an accident.
Do not attach any heavy or larg eobjects to the
key. Remove any bulky keyrings before insert-
ing the key into the ignitio nlock.
! Keep the key awayf
rom strong magnetic
fields. Otherwise, the remote control function coul dbea ffected.
Strong magnetic fields can occur in the vicin-
ity of powerful electrica linstallations.
Do not keep the key: R with electronic devices, e.g. amobilephone
or another key
R with metallic objects, e.g. coins or metal foil
R insid emetallic objects, e.g. ametal case
This can impair the key's function. Ac
heck tha tperiodically establishes aradio
connectio nbetween the vehicl eand the key
determine swhethe rav alidkey is in the vehicle.
Thi so ccurs, for example:
R during engine start
R during driving
Unite dKingd om only: G
WARNING
When the double locks are activ ated, the
doors can no longer be opened from the
inside. People in the vehicl ecan no longer get
out, e.g. in hazardous situations. There is a
risk of injury.
Therefore, do not leave any people unsuper-
vised in the vehicle, particularl ychildren, eld-
erly people or people in need of special assis-
tance. Do not activate the double lock when
people are in the vehicle.
If the vehicl ehas been locked from the outside,
the double lock function is activated as stand-
ard. It is then not possible to open the doors
from insid ethe vehicle. You can deactivate the
double lock function by deactivating the interior
motion sensor (see Digita lOwner's Manual).
The doors can then be opened from the inside
after the vehicl ehas been locked from the out-
side .The anti-theft alarm system is triggere dif
the door is opened from the inside. Switch off
the alarm (Y page56). Keyf
unctions :
& Lockst he vehicle
; % Unlocks the vehicle Key
57Opening and closing Z
Page 61 of 261

The key centrally locks/unlocks:
R the doors
R the rear door
R the fuel filler flap
X To unlock centrally: press the%button.
If you do not open the vehicle within approx-
imately 40 seconds of unlocking:
R the vehicle locks again
R protection against theft is reactivated
X To lock centrally: press the&button.
i If the
& button is pressed when the driv-
er's door is open, the rear side door on the
driver's side is not locked either.
During unlocking, the turn signals flash once.
During locking, they flash three times.
You can also set an audibl esignal to confirm
that the vehicle has been locked. The audible
signal can be activated or deactivated using the
on-board computer (Y page 139).
Only when all the components have been locked is the visual or audibl elockingc onfirmation
issued.
When the surround lighting is activated via the
on-board computer, it lights up when it is dark
after the vehicle is unlocked with the key
(Y page 138). Changing the settings of the locking
system
You can change the settings of the lockin gsys-
tem. This mean sthato nlyt he driver' sdoor and
th ef uel fille rflap are unlocked when th evehicle
is unlocked. This is useful if you frequently travel
alone.
X To change th esetting: pressand hold down
the % and& buttons simultaneously
for about six seconds until th ebattery indica-
to rlamp flashes twice (Y page 59).
If th esettin goft helockin gsystem is changed
within th esignal range of th evehicle ,pressing
the & or% button:
R locks or
R unlock sthe vehicle The key now func
tions as follows:
X To unlock the driver's door and fuel filler
flap:
press the %button once.
X To unlock centrally: press the%button
twice.
X To lock centrally: press the&button.
X To restor ethe factory settings: press and
hold down the %and& button ssimul-
taneously for approximately six seconds until the battery check lamp flashes twice
(Y page 59). Emergency key element
Genera lnotes If the vehicl
ecan no longer be unlocked with the
key, use the emergency key element.
If you use the emergency key element to unlock
and open the driver's door, the anti-theft alarm
system willbet riggered. Switch off the alarm
(Y page 56).
If you unlock the vehicle using the emergency
key element, the fuel fillerf lap willnot be
unlocked automatically.
X To unlockt he fuel fillerf lap:insert the key
into the ignition lock.
Removing the emergency key element X
Push releasec atch:in the direction of the
arrow and, at the same time, remove emer-
gency key element ;from the key.
Further information on locking/unlocking the
driver's door (Y page 62).58
KeyOpening and closing
Page 62 of 261

Inserting th
eemergency key element X
Push emergenc ykey element ;completely
into the key until it engages and release
catch :is back in its basic position. Key battery
Important safety notes G
WARNING
Batterie scontain toxic and corrosive substan-
ces. If batterie sare swallowed,itc an result in
severe health problems. There is arisk of fatal
injury.
Keep batterie sout of the reach of children. If
ab attery is swallowed,s eek medical attention
immediately. H
Environmental note Batteries contain pollutants.
It is illegal to dispose of them with the household rubbish.
They must be collected sep-
arately and disposed of in an environmentall yresponsible
recycling system. Dispose of batteries in an
environmentall
yresponsible
manner. Take discharged
batteries to aquali fied spe-
cialist workshop or to acol-
lectio npoint for used batter-
ies.
Mercedes-Benz recommends tha tyou have the
batteries replaced at aquali fied specialis twork-
shop. Checkin
gthe battery X
Pres sthe & or% button.
The battery is working properly if battery
check lamp :lights up briefly.
The battery is discharged if battery check
lamp :does not light up briefly.
X Replace the battery (Y page 59).
If the key battery is checked within the signal
reception range of the vehicle, pressing the
& or% button:
R locks or
R unlocks the vehicle
i You can obtain
abattery from any qualified
specialist workshop.
Replacing the battery You require
aCR20253Vb utton cell battery.
X Take the emergenc ykey elemen tout of the
key (Y page 58). X
Press emergen cykey element ;into the
opening in the key in the direction of the arrow
until battery compartment cover :opens.
When doing so, do not hold battery compart-
ment cover :shut.
X Remove battery compartment cover :. Key
59Opening and closing Z
Page 63 of 261

X
Repeatedly tap th ekeyagainst your palm until
battery =falls out.
X Inser tthe newb attery wit hthe positive ter-
minal facing upwards. Use alint-free cloth to
do so.
X Mak esuret hatthe surfac eofthebattery is
free of lint, grease and other contamination. X
Insert th efront tabs of battery compartment
cover :into the housing and then press to
close it.
X Insert emergency key element ;into the key
(Y page 59).
X Check the function of all key buttons on the
vehicle. Problem
swith the key Problem
Possible causes/consequences and
M MSolutions You can no longer lock or
unlock the vehicle using
the key. The key battery is weak or discharged.
X Check the key battery (Y page 59) and replace if necessary
(Y page 59).
If this does not work: X Lock or unlock the vehicle using the emergency key element
(Y page 62). There is interferenc
efrom apowerful source of radio waves.
X Lock or unlock the vehicle using the emergenc ykey element
(Y page 62). The key is faulty.
X Lock or unlock the vehicle using the emergenc ykey element
(Y page 62).
X Have the key checked at aqualified specialist workshop. The engine cannot be
started using the key. The on-board voltage is too low.
X Switch off non-essential consumers, e.g. seat heating or interior
lighting, and try to start the engine again.
If this does not work:
X Check the starter battery and charge it if necessary (Y page 226).
or X Jump-start the vehicle (Y page 227).
or X Consult aqualified specialist workshop. 60
KeyOpening and closing
Page 64 of 261

Problem
Possible causes/consequences and
M
MSolutions You have lost
akey. X
Have th ekey deactivated at aqualifie dspecialist workshop.
X Report the los simmediately to the vehicle insurers.
X If necessary ,havet he locks changed as well. Yo
uh ave lost the emer-
genc ykey element. X
Report the loss immediately to the vehicl einsurers.
X If necessary, hav ethe locks changed as well. Doors
Important safety notes
G
WARNING
If children ar eleft unsupervised in the vehicle,
they can:
R open doors and endange rother persons or
road users
R climb out and be injured by the traffic
R operate vehicl eequipment and, for exam-
ple,t rap themselves.
Childre ncoulda lsos et the vehicl einmotion,
for exampl eby:
R releasing the parking brake
R shifting the automatic transmission out of
park position P
R starting the engine.
There is arisk of an accident and injury.
When leaving the vehicle, alwayst ake the key
with you and lock the vehicle. Never leave
children unattended in the vehicle. Always
keep the key out of reach of children.
Unite dKingdom only: G
WARNING
When the double locks are activated, the
doors can no longer be opened from the
inside. People in the vehicl ecan no longer get
out, e.g. in hazardous situations. There is a
risk of injury.
Therefore, do not leave any people unsuper-
vised in the vehicle, particularl ychildren, eld-
erly people or people in need of special assis-
tance. Do not activate the double lock when
people are in the vehicle. If the vehicle has been locked from the outside,
the double lock function is activated as stand-
ard. It is then not possible to open the doors
from inside the vehicle .You can deactivate the
double lock function by deactivating the interior
motion sensor (see Digital Owner's Manual).
The doors can then be opened from the inside
after the vehicle has been locked from the out-
side. The anti-theft alarm system is triggered if
the door is opened from the inside. Switch off
the alarm (Y page 56). Unlockinga
nd opening the doors
from the inside
You can open adoor from inside the vehicle
even if it has been locked. You can only open the rear doors from inside the vehicle if they are not secured by the child-proof lock s(Ypage 51). If
the vehicle has previously been locked with the
key, openin gadoor from the inside will trigger
the anti-theft alarm system .Switc hoff the alarm
(Y page 56). :
To unlock
; To lock
= Door handle
X Slide latch :upwards.
The door is unlocked and can be opened.
X Pull door handle =and open the door. Doors
61Openingand closing Z