MERCEDES-BENZ C-CLASS CABRIOLET 2018 Repair Manual

Important safety notes
The intervention of PRE-SAFE®PLUScanno t
preven tan imminent collision .
The driver is no twarned about th eintervention
of PRE-SAF E
®PLUS.
PRE-SAF E®PLUSdoes no tinterven eif th evehi-
cle is backin gup.
When driving ,or when parking or exiting apark -
ing spac ewit hassistanc efrom Parking Pilot ,
PRE-SAF E
®PLUSwill no tapply th ebrakes.
Function
PRE-SAF E®PLUSintervenes in certain situa-
tion sif th eradar sensor system detects an
imminent head-on or rear-end collision .
PRE-SAF E
®PLUStakes th efollowin gmeasures
depending on th ehazardous situation detected:
Rif th eradar sensor system detects that a
head-on collision is imminent ,th eseat belt s
are pre-tensioned.
Rif th eradar sensor system detects that arear -
en dcollision is imminent :
-thebrak epressur eis increased if th edriver
applie sth ebrakes when th evehicl eis sta-
tionary.
-th eseat belt sare pre-tensioned.
The PRE-SAF E®PLUSbraking application is can -
celed:
Rif th eaccelerato rpedal is depressed when a
gear is engage d
Rif theris kof acollision passes or is no longer
detecte d
Rif Distanc ePilot DISTRONI Cindicates an
intention to pull away
If th ehazardous situation passes without result -
ing in an accident, th eoriginal setting sare
restored .
Automatic measures after an acci-
dent
Immediately after an accident, th efollowin g
measures are implemented, depending on th e
typ eand severit yof th eimpact :
Rthehazard warning lamp sare switched on
Rth eemergenc ylighting is activated
Rth evehicl edoor sare unlocked
Rth efron tside windows are lowered
Rvehicles wit h amemory function :th eelectri-
call yadjustable steering whee lis raised when
th edriver' sdoor is opened
Rth eengin eis switched off and th efuel suppl y
is cut off
Rvehicles wit hmbrace :automatic emergenc y
call
Children in the vehicle
Important safety notes
Acciden tstatistics sho wthat children secured
in th erear seat sare safer than children secured
in th efront-passenger seat .Fo rthis reason ,
Mercedes-Ben zstrongly advises that you instal l
a child restrain tsystem on arear seat .Children
are generally bette rprotected there .
If achild younger than twelve years old and
under 5ft (1.50 m) in height is traveling in th e
vehicle:
Ralways secure th echild in achild restrain t
system suitable for Mercedes-Ben zvehicles.
The child restrain tsystem must be appropri-
ate to th eage, weigh tand siz eof th echild
Rbe sur eto observ eth einstruction sand safet y
note sin this section in addition to th echild
restrain tsystem manufacturer' sinstallation
instruction s
Rbe sureto observ eth einstruction sand safet y
note son th e"Occupant classification system
(OCS)" (
Ypage 51)
GWARNIN G
If you leav echildren unsupervised in th evehi-
cle ,they could set it in motion by, for example:
Rrelease th eparking brake.
Rshif tth eautomatic transmission out of th e
parking position P.
Rstart theengine.
In addition ,they may operate vehicl eequip-
men tand become trapped .Ther eis aris kof
an acciden tand injury.
When leaving th evehicle, always tak eth e
SmartKey wit hyou and loc kth evehicle. Never
leav echildren unsupervised in th evehicle.
Children in the vehicle59
Safety
Z

GWARNING
If persons, particularly children are subjected to prolonged exposure to extreme heat or
cold, there is a risk of injury, possibly even
fatal. Never leave children unattended in the
vehicle.
GWARNING
If the child restraint system is subjected to
direct sunlight, parts may get very hot. Chil-
dren may burn themselves on these parts,
particularly on the metal parts of the child
restraint system. There is a risk of injury.
If you leave the vehicle, taking the child with
you, always ensure that the child restraint
system is not exposed to direct sunlight. Pro- tect it with a blanket, for example. If the child
restraint system has been exposed to direct
sunlight, let it cool down before securing the
child in it. Never leave children unattended in
the vehicle.
Always ensure that all vehicle occupants have
their seat belts fastened correctly and are sitting
properly. Particular attention must be paid to
children.
Observe the safety notes on the seat belt
(
Ypage 45) and the notes on correct use of seat
belts (Ypage 46).
A booster seat may be necessary to achieve
proper seat belt positioning for children over
41 lbs (18 kg) until they reach a height where a
three-point seat belt can be properly fastened
without a booster seat.
Special seatbelt retractor
GWARNING
If the seat belt is released while driving, the
child restraint system will no longer be
secured properly. The special seat belt retrac- tor is disabled and the inertia real draws in a
portion of the seat belt. The seat belt cannot
be immediately refastened. There is an
increased risk of injury, possibly even fatal.
Stop the vehicle immediately, paying atten-
tion to road and traffic conditions. Reactivate
the special seat belt retractor and secure thechild restraint system properly.
All seat belts in the vehicle, except the driver's
seat belt, are equipped with a special seat belt
retractor. When activated, the special seat belt
retractor ensures that the seat belt cannot
slacken once the child seat is secured.
Installing a child restraint system:
XMake sure you observe the child restraint
system manufacturer's installation instruc-
tions.
XPull the front seat belt smoothly out of the
seat-belt extender and the rear seat belt out
of the belt sash guide.
XEngage seat belt tongue in belt buckle.
Activating the special seat belt retractor:
XPull the seat belt out fully and let the inertia
reel retract it again.
While the seat belt is retracting, you should
hear a ratcheting sound. The special seat belt
retractor is enabled.
XPush the child restraint system down so that
the seat belt is tight and does not loosen.
Removing the child restraint system and deac-
tivating the special seat belt retractor:
XMake sure you observe the child restraint
system manufacturer's installation instruc-
tions.
XPress the release button of the seat belt
buckle, hold the seat belt tongue and route it
to the seat belt extender in front or the belt
sash guide in the rear compartment.
The special seat belt retractor is deactivated.
Child restraint system
The use of seat belts and child restraint systems
is required by law in:
Rall 50 states
Rthe U.S. territories
Rthe District of Columbia
Rall Canadian provinces
You can obtain further information about the
correct child restraint system from any author-
ized Mercedes-Benz Center.
60Children in the vehicle
Safety

GWARNING
If the child restraint system is installed incor-
rectly on a suitable seat, it cannot protect as
intended. The child cannot then be restrained
in the event of an accident, heavy braking or
sudden changes of direction. There is an
increased risk of injury, possibly even fatal.
Make sure that you observe the child restraint
system manufacturer's installation instruc-
tions and the notes on use. Please ensure,
that the base of the child restraint system is
always resting completely on the seat cush-
ion. Never place objects, e.g. cushions, under or behind the child restraint system. Only use
child restraint systems with the original cover
designed for them. Only replace damaged
covers with genuine covers.
GWARNING
If the child restraint system is installed incor-
rectly or is not secured, it can come loose in
the event of an accident, heavy braking or a
sudden change in direction. The child
restraint system could be thrown about, strik-
ing vehicle occupants. There is an increased
risk of injury, possibly even fatal.
Always install child restraint systems prop-
erly, even if they are not being used. Make
sure that you observe the child restraint sys-
tem manufacturer's installation instructions.
You will find further information on stowing
objects, luggage or loads under "Loading guide-
lines" (
Ypage 263).
GWARNING
Child restraint systems or their securing sys-
tems which have been damaged or subjected
to a load in an accident can no longer protect
as intended. The child cannot then be
restrained in the event of an accident, heavy
braking or sudden changes of direction. There is an increased risk of injury, possibly even
fatal.
Replace child restraint systems which have
been damaged or subjected to a load in an
accident as soon as possible. Have the secur-
ing systems on the child restraint system
checked at a qualified specialist workshop,
before you install a child restraint system
again.
The securing systems of child restraint systems
are:
Rthe seat belt system
Rthe LATCH-type (ISOFIX) securing rings
Rthe Top Tether anchorages
If it is absolutely necessary to carry a child on
the front-passenger seat, be sure to observe the
information on the "Occupant Classification
System (OCS)" (
Ypage 51). There you will also
find information on deactivating the front-
passenger front air bag.
All child restraint systems must meet the fol-
lowing standards:
RU.S. Federal Motor Vehicle Safety Standards
213 and 225
RCanadian Motor Vehicle Safety Standards
213 and 210.2
Confirmation that the child restraint system cor-
responds to the standards can be found on an
instruction label on the child restraint system.
This confirmation can also be found in the instal-
lation instructions that are included with the
child restraint system.
Observe the warning labels in the vehicle inte-
rior and on the child restraint system.
LATCH-type (ISOFIX) child seat secur-
ing system
GWARNING
LATCH-type (ISOFIX) child restraint systems
do not offer sufficient protection for children
whose weight combined with the child
restraint system is greater than 65 lbs (29 kg) and who are secured using the safety belt
integrated in the child restraint system. In the
event of an accident, a child might not be
restrained correctly. This poses an increased
risk of injury or even fatal injury.
If the child and the child restraint system
together weigh more than 65 lbs (29 kg), only
use LATCH-type (ISOFIX) child restraint sys-
tems with which the child is also secured with
Children in the vehicle61
Safety
Z

the vehicle seat belt. Also secure the child
restraint system with the Top Tether belt, if
available.
Always comply with the manufacturer's instal-
lation and operating instructions for the child
restraint system used.
Before every trip, make sure that the LATCH-
type (ISOFIX) child restraint system is engaged
correctly in both LATCH-type (ISOFIX) securing
rings
XInstall the LATCH-type (ISOFIX) child restraint system on both LATCH-type (ISOFIX) securing
rings :.
ISOFIX is a standardized securing system for
specially designed child restraint systems on
the rear seats. LATCH-type (ISOFIX) securing
rings for two LATCH-type (ISOFIX) child restraint
systems are installed on the left and right of the
rear seats.
Non-LATCH-type (ISOFIX) child seats may also
be used and can be installed using the vehicle's
seat belt system. Install the child seat according
to the manufacturer's instructions.
Top Tether
Introduction
Top Tether provides an additional connection
between the LATCH-type (ISOFIX) child restraint system secured with a LATCH-type (ISOFIX) sys-
tem and the vehicle. This helps reduce the risk of
injury even further. If the child restraint system
is equipped with a Top Tether belt, this should
always be used.
Important safety notes
GWARNING
If the rear seat backrests are not locked, they
could fold forwards in the event of an acci-
dent, heavy braking or sudden changes of
direction. As a result, child restraint systems
cannot perform their intended protective
function. Rear seat backrests that are not
locked can also cause additional injuries, e.g.
in the event of an accident. This poses an
increased risk of injury or even fatal injury.
Always lock rear seat backrests after instal-
ling a Top Tether belt. Observe the lock veri-
fication indicator.
If the rear seat backrest is not engaged and
locked, this will be shown in the multifunction
display in the instrument cluster.
Top Tether anchorages
Top Tether anchorage points :are located on
the rear side of the backrests on both outer rear
seats.
XPut the LATCH-type (ISOFIX) child restraint
system with Top Tether on the rear seat.
Always comply with the child restraint system
manufacturer's installation instructions when
doing so.
62Children in the vehicle
Safety

XFold the rear seat backrest forwards
(Ypage 265).
XHook Top Tether hook;on Top Tether
anchorage :.
XFold back the rear seat backrest
(Ypage 265).
XMake sure that the Top Tether belt =is not
twisted and that the rear seat backrest is
locked.
XSecure the child restraint system with LATCH-
type (ISOFIX) (Ypage 61).
XTension Top Tether belt =from the trunk.
XMake sure there is sufficient belt strap avail-
able to tighten it.
XAlways comply with the child restraint system
manufacturer's installation instructions when
doing so.
Child restraint system on the front-
passenger seat
General notes
Accident statistics show that children secured
in the rear seats are safer than children secured
in the front-passenger seat. For this reason,
Mercedes-Benz strongly advises that you install
the child restraint system on a rear seat.
If it is absolutely necessary to install a child
restraint system on the front-passenger seat,
always observe the instructions and safety
notes on the "Occupant Classification System
(OCS)" (
Ypage 51). You can thus avoid the risks that could arise as
a result of:
Ran incorrectly categorized person in the front-
passenger seat
Rthe unintentional deactivation of the front-
passenger front air bag
Rthe unsuitable positioning of the child
restraint system, e.g. too close to the dash-
board
Rearward-facing child restraint system
If it is absolutely necessary to install a rearward-
facing child restraint system on the front-
passenger seat, always make sure that the
front-passenger front air bag is deactivated.
Only if the PASSENGER AIR BAG OFF indicator
lamp is permanently lit (
Ypage 44 )is the front-
passenger front air bag deactivated.
Always observe the child restraint system man-
ufacturer's installation and operating instruc-
tions.
Forward-facing child restraint system
If it is absolutely necessary to install a forward-
facing child restraint system on the front-
passenger seat, always move the front-
passenger seat as far back as possible. Fully
retract the seat cushion length. The entire base of the child restraint system must always rest on
the seat cushion of the front-passenger seat.
The backrest of the child restraint system must
lie as flat as possible against the backrest of thefront-passenger seat. The child restraint system
must not touch the roof or be subjected to a load
by the head restraint. Adjust the angle of the
seat backrest and the head restraint position
accordingly. Always make sure that the shoul-
der belt strap is correctly routed from the vehi-
cle belt outlet to the shoulder belt guide on the
child restraint system. The shoulder belt strap
must be routed forward and down from the vehi-
cle belt outlet. If necessary, adjust the vehicle
belt outlet and the front-passenger seat accord-
ingly.
Always observe the child restraint system man-
ufacturer's installation and operating instruc-
tions.
Children in the vehicle63
Safety
Z

Pets in the vehicle
GWARNING
If you leave animals unattended or unsecured
in the vehicle, they could press buttons or
switches, for example.
As a result, they could:
Ractivate vehicle equipment and become
trapped, for example
Ractivate or deactivate systems, thereby
endangering other road users
Unsecured animals could also be flung around
the vehicle in the event of an accident or sud-
den steering or braking, thereby injuring vehi-
cle occupants. There is a risk of an accident
and injury.
Never leave animals unattended in the vehi-
cle. Always secure animals properly during
the journey, e.g. use a suitable animal trans-
port box.
Driving safety systems
Overview of driving safety systems
In this section, you will find information about
the following driving safety systems:
RABS (Anti-lock BrakingSystem)
(Ypage 64)
RBAS ( Brake Assist System) (Ypage 65)
RActive Brake Assist (Ypage 65)
RESP®(Electronic StabilityProgram)
(Ypage 67)
REBD ( Electronic Brake force Distribution)
(Ypage 71)
RADAPTIVE BRAKE (Ypage 71)
RActive Brake Assist with cross-traffic function (Ypage 71)
RSTEER CONTROL (Ypage 74)
Important safety notes
If you fail to adapt your driving style or if you are
inattentive, the driving safety systems can nei-
ther reduce the risk of an accident nor overridethe laws of physics. Driving safety systems are merely aids designed to assist driving. You are
responsible for maintaining the distance to the
vehicle in front, for vehicle speed, for braking in
good time, and for staying in lane. Always adapt
your driving style to suit the prevailing road and
weather conditions and maintain a safe distance
from the vehicle in front. Drive carefully.
The driving safety systems described only work
as effectively as possible when there is ade-
quate contact between the tires and the road
surface. Pay particular attention to the informa-
tion regarding tires, recommended minimum
tire tread depths etc. in the "Wheels and tires"
section (
Ypage 312).
In wintry driving conditions, always use winter
tires (M+S tires) and if necessary, snow chains.
Only in this way will the driving safety systems
described in this section work as effectively as
possible.
ABS (Anti-lock Braking System)
General information
ABS regulates brake pressure in such a way that
the wheels do not lock when you brake. This
allows you to continue steering the vehicle when
braking.
The ! ABS warning lamp in the instrument
cluster lights up when the ignition is switched
on. It goes out when the engine is running.
ABS works from a speed of about 5 mph
(8 km/h), regardless of road-surface conditions.
ABS works on slippery surfaces, even when you
only brake gently.
Important safety notes
iObserve the "Important safety notes" sec-
tion (Ypage 64).
GWARNING
If ABS is faulty, the wheels could lock when
braking. The steerability and braking charac-
teristics may be severely impaired. Addition-
ally, further driving safety systems are deac-
tivated. There is an increased danger of skid-
ding and accidents.
Drive on carefully. Have ABS checked imme-
diately at a qualified specialist workshop.
64Driving safety systems
Safety

When ABS is malfunctioning, other systems,
including driving safety systems, will also
become inoperative. Observe the information
on the ABS warning lamp (
Ypage 244) and dis-
play messages which may be shown in the
instrument cluster (
Ypage 213).
Braking
XIf ABS intervenes: continue to depress the
brake pedal vigorously until the braking sit-
uation is over.
XTo make a full brake application: depress
the brake pedal with full force.
If ABS intervenes when braking, you will feel a
pulsing in the brake pedal.
The pulsating brake pedal can be an indication
of hazardous road conditions, and functions as a reminder to take extra care while driving.
BAS (Brake Assist System)
General information
BAS operates in emergency braking situations.
If you depress the brake pedal quickly, BAS
automatically boosts the braking force, thus
shortening the stopping distance.
Important safety notes
iObserve the "Important safety notes" sec-
tion (Ypage 64).
GWARNING
If BAS is malfunctioning, the braking distance
in an emergency braking situation is
increased. There is a risk of an accident.
In an emergency braking situation, depress
the brake pedal with full force. ABS prevents
the wheels from locking.
Braking
XKeep the brake pedal firmly depressed until
the emergency braking situation is over.
ABS prevents the wheels from locking.
The brakes will function as usual once you
release the brake pedal. BAS is deactivated.
Active Brake Assist
General information
iObserve the "Important safety notes" sec-
tion (Ypage 64).
Active Brake Assist consists of a distance warn-
ing function with an autonomous braking func-
tion and Adaptive Brake Assist.
Active Brake Assist can help you to minimize the
risk of a collision with the vehicle traveling in
front or reduce the effects of such a collision.
If Active Brake Assist detects that there is a risk
of collision, you will be warned visually and
acoustically. If you do not react to the visual and audible collision warning, autonomous braking
can be initiated in critical situations. If you apply
the brake yourself in a critical situation, Adap-
tive Brake Assist of the Active Brake Assist sys-
tem supports you.
Important safety notes
In particular, the detection of obstacles can be
impaired if:
Rthere is dirt on the sensors or anything else
covering the sensors
Rthere is snow or heavy rain
Rthere is interference by other radar sources
Rthere are strong radar reflections, for exam-
ple in parking garages
Ra narrow vehicle is traveling in front, e.g. a
motorbike
Ra vehicle is traveling in front on a different line
Ryou are driving a new vehicle or servicing on
the Active Brake Assist system has just been
carried out
Observe the important safety notes in the
"Breaking-in notes" section (
Ypage 122).
Following damage to the front end of the vehicle,
have the configuration and operation of the
radar sensor checked at a qualified specialist
workshop. This also applies to collisions at slow
speeds where there is no visible damage to the
front of the vehicle.
Activating/deactivating
Active Brake Assist is automatically active after
switching on the ignition.
You can activate or deactivate Active Brake
Assist (
Ypage 204) in the on-board computer.
Driving safety systems65
Safety
Z

When deactivated, the distance warning func-
tion and the autonomous braking function are
also deactivated.
If Active Brake Assist is deactivated, theæ
symbol appears on the assistant display.
Distance warning function
General information
The distance warning function can help you to
minimize the risk of a front-end collision with a
vehicle ahead or reduce the effects of such a
collision. If the distance warning function
detects that there is a risk of a collision, you will
be warned visually and acoustically.
Important safety notes
iObserve the "Important safety notes" sec-
tion for driving safety systems (Ypage 64).
GWARNING
The distance warning function does not react:
Rto people or animals
Rto oncoming vehicles
Rto crossing traffic
Rwhen cornering
The distance warning function may not give
warnings in all critical situations. There is a
risk of an accident.
Always pay careful attention to the traffic sit-
uation and be ready to brake.
Always adapt your speed to suit the prevailing
road and traffic conditions.
GWARNING
The distance warning function cannot always
clearly identify objects and complex traffic
situations.
In such cases, the distance warning function
may:
Rgive an unnecessary warning
Rnot give a warning
There is a risk of an accident.
Always pay careful attention to the traffic sit-
uation and do not rely solely on the distance
warning function.
Function
Starting at a speed of approximately 4 mph
(7 km/h), the distance warning function warns
you if you are rapidly approaching a vehicle in
front. An intermittent warning tone will then
sound, and the ·distance warning lamp will
light up in the instrument cluster.
XBrake immediately in order to increase the
distance from the vehicle in front.
or
XTake evasive action, provided it is safe to do
so.
Due to the nature of the system, particularly
complicated but non-critical driving conditions
may also cause the system to display a warning.
With the help of the radar sensor system, the
distance warning function can detect obstacles
that are in the path of your vehicle for an exten-
ded period of time.
Up to a speed of approximately 44 mph
(70 km/ h), the distance warning function can
also react to stationary obstacles, such as stop-
ped or parked vehicles.
Autonomous braking function
If the driver does not react to the distance warn-
ing signal in a critical situation, Active Brake
Assist can assist the driver with the autonomous
braking function.
Vehicles without Distance Pilot DISTRONIC:
the autonomous braking function is available in
the following speed ranges:
R4–65 mph (7–105 km/h) for moving objects
R4–31 mph (7–50 km/ h)for stationary objects
Vehicles with Distance Pilot DISTRONIC: the
autonomous braking function is available in the
following speed ranges:
R4–124 mph (7–200 km/h) for moving objects
R4–31 mph (7–50 km/h) for stationary objects
Due to the nature of the system, particularly
complicated but non-critical driving conditions
may also cause the Autonomous Braking Func-
tion to intervene.
If the autonomous braking function requires a
particularly high braking force, preventative
passenger protection measures (PRE-SAFE
®)
are activated simultaneously (Ypage 58).
66Driving safety systems
Safety

Adaptive Brake Assist
Generalinformation
iObserv eth e"Importan tsafet ynotes" sec -
tion (Ypage 64) .
Wit hth ehelp of adaptive Brake Assist, th edis-
tance warning signal can detec tobstacles that
are in th epat hof your vehicl efor an extended
period of time.
If adaptive Brake Assis tdetects aris kof colli-
sion wit hth evehicl ein front, it calculates th e
braking force necessar yto avoi d acollision .If
you apply th ebrakes forcefully, adaptive Brake
Assis twill automatically increas eth ebraking
force to alevel suitable for th etraffic conditions.
Adaptive Brake Assis tprovides braking assis-
tance in hazardous situation sat speeds abov e
4 mph (7 km/h). It uses radar sensor technology
to assess th etraffic situation .
Up to aspee dof approximately 15 5mph
(25 0km/h), Adaptive Brake Assis tis capable of
reacting to moving objects that hav ealready
been detecte das suc hat least once ove rth e
period of observation .
Up to aspee dof approximately 44 mph
(70 km/h), Adaptive Brake Assis treacts to sta-
tionary obstacles.
If adaptive Brake Assis tdemand sparticularly
high braking force ,preventative passenger pro -
tection measures (PRE-SAF E
®)are activated
simultaneously (Ypage 58).
XKeepth ebrak epedal depressed until th e
emergenc ybraking situation is over.
AB Sprevents th ewheels from locking .
The brakes will wor knormally again if:
Ryou release th ebrak epedal .
Rthere is no longer any danger of acollision .
Rno obstacle is detecte din fron tof your vehi-
cle .
Adaptive Brake Assis tis then deactivated.
Important safety notes
iObserv eth e"Importan tsafet ynotes" sec -
tion for drivin gsafet ysystems (Ypage 64).
GWARNIN G
Adaptive Brake Assis tcanno talways clearly
identify objects and complex traffic situa-
tions.
In suc hcases, Adaptive Brake Assis tcan :
Rinterven eunnecessarily
Rno tinterven e
There is aris kof an accident.
Always pay careful attention to th etraffic sit -
uation and be read yto brake. Terminate th e
intervention in anon-critical drivin gsituation .
GWARNIN G
Adaptive Brake Assis tdoes no treact:
Rto people or animals
Rto oncomin gvehicles
Rto crossing traffic
Rwhen cornering
As aresult ,th eAdaptive Brake Assis tmay no t
interven ein all critical conditions. There is a
ris kof an accident.
Always pay careful attention to th etraffic sit -
uation and be read yto brake.
Always adapt your spee dto suit th eprevailing
road and traffic conditions.
Due to th enature of th esystem, particularly
complicated but non-critical drivin gcondition s
may also caus eBrake Assis tto intervene.
If adaptive Brake Assis tis no tavailable due to a
malfunction in th eradar sensor system, th e
brak esystem remain savailable wit hfull brak e
boosting effec tand BAS.
ESP®(Electron ic Stability Program)
Gene ral notes
iObserv eth e"Importan tsafet ynotes" sec -
tion (Ypage 64) .
ES P
®monitors drivin gstabilit yand traction ,i.e .
powe rtransmission between th etires and th e
road surface.
If ES P
®detects that th evehicl eis deviating from
th edirection desired by th edriver ,on eor mor e
wheels are braked to stabiliz eth evehicle. The
engin eoutput is also modifie dto keep th evehi-
cle on th edesired cours ewithin physical limits .
ES P
®assist sth edriver when pullin gaway on
Driving safety systems67
Safety
Z

wet or slippery roads. ESP®can also stabilize
the vehicle during braking.
ETS/4ETS (Electronic Traction System)
iObserve the "Important safety notes" sec-
tion (Ypage 64).
ETS traction control is part of ESP
®. On vehicles
with 4MATIC, 4ETS is part of ESP®.
Traction control brakes the drive wheels indi-
vidually if they spin. This enables you to pull
away and accelerate on slippery surfaces, for
example if the road surface is slippery on one
side. In addition, more drive torque is transfer-
red to the wheel or wheels with traction.
Traction control remains active, even if you
deactivate ESP
®.
Important safety notes
iObserve the "Important safety notes" sec-
tion (Ypage 64).
GWARNING
If ESP
®is malfunctioning, ESP®is unable to
stabilize the vehicle. Additionally, further driv-
ing safety systems are deactivated. This
increases the risk of skidding and an accident.
Drive on carefully. Have ESP
®checked at a
qualified specialist workshop.
When towing the vehicle with the rear axle
raised, observe the notes on ESP
®
(Ypage 307).
If the å ESP®OFF warning lamp lights up
continuously, ESP®is deactivated.
If the ÷ ESP®warning lamp lights up contin-
uously, ESP®is not available due to a malfunc-
tion.
Observe the information on warning lamps
(
Ypage 244) and display messages which may
be shown in the instrument cluster
(
Ypage 213).
Only use wheels with the recommended tire
sizes. Only then will ESP
®function properly.
Characteristics of ESP®
General information
If the ÷ ESP®warning lamp goes out before
beginning the journey, ESP®is automatically
active.
If ESP
®intervenes, the ÷ESP®warning lamp
flashes in the instrument cluster.
If ESP
®intervenes:
XDo not deactivate ESP®under any circum-
stances.
XOnly depress the accelerator pedal as far as
necessary when pulling away.
XAdapt your driving style to suit the prevailing
road and weather conditions.
ECO start/stop function
The ECO start/stop function switches the
engine off automatically when the vehicle stops
moving. The engine starts automatically when
the driver wants to pull away again. ESP
®
remains in its previously selected status, e.g. if
ESP®was deactivated before the engine was
automatically switched off.
Deactivating/activating ESP®(except
Mercedes ‑AMG vehicles)
Important safety notes
iObserve the "Important safety notes" sec-
tion (Ypage 64).
You can select between the following states of
ESP
®:
RESP®is activated.
RESP®is deactivated.
GWARNING
If you deactivate ESP
®, ESP®no longer sta-
bilizes the vehicle. There is an increased risk
of skidding and an accident.
Only deactivate ESP
®in the situations descri-
bed in the following.
It may be best to deactivate ESP
®in the follow-
ing situations:
Rwhen using snow chains
Rin deep snow
Ron sand or gravel
68Driving safety systems
Safety