tires MERCEDES-BENZ CLS 2014 User Guide

XTo activate/deactivate:press button.
If indicator lampis lit, operationofthe
rear side windows is disabled. Operation is
only possible using the switches in the
driver's door. If indicator lampis off,
operation is possible using the switches in
the rear compartment.
Driving safety systems
Overview of driving safety systems
In this section, you will find information about
the following driving safety systems:
RABS (Anti-lockBrakingSystem)
(Ypage 66)
RBAS (BrakeAssistSystem) (Ypage 67)
RBAS PLUS (BrakeAssistSystem Plus)
(Ypage 67)
RESP®(ElectronicStabilityProgram)
(Ypage 68)
REBD (ElectronicBrake forceDistribution)
(Ypage 71)
RADAPTIVE BRAKE (Ypage 72)
RPRE-SAFE®Brake (Ypage 72)
Important safety notes
If you fail to adapt your driving style or
become distracted, the driving safety
systems can neither reduce the risk of
accident nor override the laws of physics.
Driving safety systems are merely aids
designed to assist driving. You are
responsible for the distance to the vehicle in
front,for vehicle speed and for braking in
good time. Always adapt your driving style to
suit the prevailing road, weather and traffic
conditionsand maintainasafe distancefrom
thevehicle in front. Drive carefully.
iThe driving safety systems describedonly
work as effectivelyaspossible when there
is adequatecontactbetween thetires and
theroad surface. Pleasepay special
attentiontothenotesontires,
recommendedminimumtire tread depths,
etc.(Ypage 334).
In wintry drivingconditions, always use
winter tires (M+S tires) and if necessary,
snowchains. Only in this way will the
drivingsafetysystems described in this
section work as effectively as possible.
ABS (Anti-lock BrakingSystem)
Important safety notes
iObserve the "Importantsafetynotes"
section(Ypage 66).
GWARNING
If ABSisfaulty, the wheels could lock when
braking. The steerability and braking
characteristics may be severely impaired.
Additionally, further driving safety systems
are deactivated. There is an increased danger
of skidding and accidents.
Drive on carefully.Have ABS checked
immediately ataqualified specialist
workshop.
When ABS is malfunctioning, other systems,
including driving safety systems, will also
become inoperative. Observe the information
on the ABS warning lamp (Ypage 267) and
displaymessages which may be shown in the
instrument cluster (Ypage 238).
ABS regulates brake pressure in suchaway
that the wheels do not lock when you brake.
This allows you to continue steering the
vehicle when braking.
66Driving safety systems
Safety

distracted from traffic conditions. You could
also lose control of the vehicle. There isarisk
of an accident.
Only operate this equipment when the vehicle
is stationary.
Observe the legal requirements for the
country in which you are driving.Some
jurisdictionsprohibit the driver from using a
mobile phone while drivingavehicle.
If you makeacall while driving,alwaysuse
hands-free mode. Only operate the telephone
when the traffic situation permits. If you are
unsure, pull over toasafe location and stop
before operatingthe telephone.
Bear in mind that ataspeed of only 30 mph
(approximately 50 km/h) the vehicle covers
adistanceof44ft(approximately 14 m) per
second.
Drive sensibly–save fuel
Observe the following tips to save fuel:
XThe tires should always be inflated to the
recommended tire pressure.
XRemove unnecessary loads.
XRemove roof racks whenthey are not
needed.
XWarm up the engine at low engine speeds.
XAvoid frequent acceleration or braking.
XHave all maintenancework carried out as
indicated by the service intervals in the
MaintenanceBooklet or by the service
interval display.
Fuel consumption also increases when
driving in cold weather, in stop-start traffic
and in hilly terrain.
Drinking and driving
GWARNING
Drinking and driving and/or taking drugs and
driving are very dangerous combinations.
Evenasmall amount of alcohol or drugs can
affect your reflexes, perceptions and
judgment.
The possibility ofaserious or even fatal
accident are greatly increased when you drink
or take drugs and drive.
Do not drink or take drugs and drive or allow
anyone to drive who has been drinking or
taking drugs.
Emission control
GWARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Inhaling
these exhaust gases leads to poisoning. There
isarisk of fatal injury. Therefore never leave
the engine running in enclosed spaces
without sufficient ventilation.
Certain engine systems are designed to keep
the level of poisonous components in exhaust
fumes within legal limits.
These systems only work at peak efficiency if
they are serviced exactly in accordance with
the manufacturer's specifications. For this
reason, only have work on the engine carried
out by qualified and authorized Mercedes-
Benz technicians.
The engine settings must not be changed
under any circumstances. Furthermore, all
specific service work must be carried out at
regular intervals and in accordance with the
Mercedes-Benzservice requirements. Details
can be found in the Maintenance Booklet.
ECO display
Example: ECO display
The ECO display gives you information on how
economical your driving style is. The ECO
display assists you in achieving the optimum
170Driving tips
Driving and parking

New and replaced brake pads and discs only
reach their optimum braking effect after
several hundred kilometers of driving.
Compensate for this by applying greater force
to the brake pedal. Keep this in mind, and
adapt yourdriving and braking accordingly
during this break-in period.
Excessive heavy braking results in
correspondingly high brake wear. Observe
thebrake wearwarning lamp in the
instrumentcluster and noteany brakestatus
messages in the multifunction display.
Especially for high performancedriving, it is
importanttomaintain and have the brake
system checked regularly.
Driving on wet roads
Hydroplaning
If water has accumulated toacertain depth
on the road surface, there isadanger of
hydroplaning occurring, even if:
Ryou drive at low speeds.
Rthe tires have adequate tread depth.
For this reason,inthe eventofheavy rain or
in conditions in which hydroplaning may
occur, you must drive in the following
manner:
Rlower your speed.
Ravoid ruts.
Rbrakecarefully.
Driving on flooded roads
!Do not drive through floodedareas.
Check the depthofany water beforedriving
through it. Drive slowly through standing
water.Otherwise, water mayenterthe
vehicle interior or the engine compartment.
This can damage the electronic
components in the engine or the automatic
transmission. Water can also be drawn in
by the engine's air suction nozzles and this
can cause engine damage.
Winter driving
Important safety notes
GWARNING
If you shift down onaslippery road surface in
an attempt to increase the engine's braking
effect,the drive wheels could lose their grip.
There is an increased danger of skidding and
accidents.
Do not shift down for additional engine
braking onaslippery road surface.
GDANGER
If the exhaust pipe is blocked or adequate
ventilation is not possible, poisonous gases
such as carbon monoxide (CO) may enter the
vehicle. This is the case, e.g. if the vehicle
becomes trapped in snow. There isarisk of
fatal injury.
If you leave the engine or the auxiliary heating
running, make sure the exhaust pipe and area
around the vehicle are clear of snow. To
ensure an adequate supply of fresh air, open
awindow on the side of the vehicle that is not
facing into the wind.
Have your vehicle winterproofed ataqualified
specialist workshop at the onset of winter.
Observe the notes in the "Winter operation"
section (Ypage 336).
Driving with summer tires
Observe the notes in the "Winter operation"
section (Ypage 336).
Slippery road surfaces
GWARNING
If you shift down onaslippery road surface in
an attempt to increase the engine's braking
effect,the drive wheels could lose their grip.
There is an increased danger of skidding and
accidents.
Do not shift down for additional engine
braking onaslippery road surface.
174Driving tips
Driving and parking

Load compensation
The vehicle can compensatedifferences in
thevehicle level by raisingorlowering the
rear axle. This is the case, for example, if
people get out or if luggage is being loaded.
Load compensation takes place if:
Radoor or the trunk lid/tailgate is opened
Rthe parked vehicle is unlocked
For larger level changes, the engine must be
running.
4MATIC (permanent four-wheel drive)
If you fail to adapt your driving style, 4MATIC
can neither reduce the risk of accident nor
override the laws of physics. 4MATIC cannot
take account of road, weather and traffic
conditions. 4MATIC is only an aid. You are
responsible for the distance to the vehicle in
front,for vehicle speed, for braking in good
time and for staying in your lane.
Ifadrive wheel spins due to insufficientgrip:
ROnly depress the accelerator pedalasfar
as necessary when pulling away.
RAccelerate less when driving.
!Never tow the vehiclewith one axle
raised. This may damage the transfer case.
Damageofthis sort is not covered by the
Mercedes-Benz Limited Warranty. All
wheels must remaineitheronthe ground
or be fully raised. Observe the instructions
for towing the vehicle with all wheels in full
contact with the ground.
iIn wintry driving conditions, the maximum
effect of 4MATIC can only be achieved if
you use winter tires(M+S tires), with snow
chains if necessary.
4MATIC ensures that allfour wheels are
permanently driven. Together with ESP®,it
improves the traction of yourvehicle
wheneveradrive wheel spins due to
insufficient grip.
PARKTRONIC
Important safetynotes
PARKTRONIC is an electronic parkingaid with
ultrasonic sensors. It indicates visually and
audibly the distancebetween your vehicle
and an object.
PARKTRONIC is only an aid. It is not a
replacementfor your attention to your
immediate surroundings. You are always
responsible for safe maneuvering, parking
and exitingaparkingspace. When
maneuvering, parkingorpulling out of a
parkingspace, make sure that thereare no
persons, animals or objects in the area in
which you are maneuvering.
!When parking, pay particular attention to
objects above or below the sensors, such
as flower pots or trailer drawbars.
PARKTRONIC does not detectsuch objects
when they are in theimmediatevicinity of
thevehicle. You could damagethe vehicle
or the objects.
The sensors may not detect snow and other
objectsthat absorb ultrasonic waves.
Ultrasonic sources such as an automatic
car wash, the compressed-air brakes on a
truck orapneumatic drill could cause
PARKTRONIC to malfunction.
PARKTRONIC may not function correctly on
uneven terrain.
PARKTRONIC is activated automatically when
you:
Rswitch on the ignition
Rshift the transmission to positionD,RorN
Rrelease the parking brake
PARKTRONIC is deactivated at speeds above
11 mph (18 km/h). It is reactivated at lower
speeds.
PARKTRONIC monitors the area around your
vehicle using six sensors in the front bumper
and four sensors in the rear bumper.
Driving systems193
Driving and parking
Z

Problems with PARKTRONIC
ProblemPossible causes/consequences andSolutions
Only the red segments
in the PARKTRONIC
warning displaysare lit.
You also hearawarning
tone for approximately
two seconds.
PARKTRONIC is then
deactivated and the
indicator lamp on the
PARKTRONIC button
lights up.
PARKTRONIC has malfunctioned and has switched off.
XIf problems persist, have PARKTRONIC checked ataqualified
specialist workshop.
Only the red segments
in the PARKTRONIC
warning displaysare lit.
PARKTRONIC is then
deactivated.
The PARKTRONIC sensors are dirty or there is interference.
XCleanthe PARKTRONIC sensors (Ypage 315).
XSwitch the ignition back on.
The problem may be caused by an external source of radio or
ultrasound waves.
XSee if PARKTRONIC functions inadifferent location.
Active Parking Assist
General notes
Active Parking Assist is an electronic parking
aid with ultrasound. It measures the road on
both sides of the vehicle.Aparking symbol
indicatesasuitable parking space. Active
steering interventioncan assistyou during
parking. You may also use PARKTRONIC
(Ypage 193).
Important safety notes
Active Parking Assist is merely an aid. It is not
areplacement for your attention to your
immediate surroundings. You are always
responsible for safe maneuvering, parking
and exitingaparking space. Make sure that
no persons, animals or objectsare in the
maneuvering range.
When PARKTRONIC is switched off, Active
Parking Assist is also unavailable.
GWARNING
The vehicle swings out when parking and in
doing so could cross into the opposite lane.
This could result inacollision with another
road user. There isarisk of an accident.
Pay attention to other road users when
parking. Stop the vehicle if necessary or
cancel the Active Parking Assist parking
procedure.
!If unavoidable, you should drive over
obstacles such as curbs slowly and not at
asharp angle. Otherwise, you may damage
the wheels or tires.
Active Parking Assist may possibly indicate
parking spaces which are not suitable for
parking, for example:
Rwhere parking or stopping is prohibited
Rin front of driveways or entrances and exits
Ron unsuitable surfaces
196Driving systems
Driving and parking

Yellow guide line atadistanceof
approximately 13 ft(4.0m)from the rear
of the vehicle
White guide line without turning the
steering wheel, vehicle width including
the exterior mirrors (static)
$CLSCoupe:yellow guide line for the
vehicle width including the exterior
mirrors,for current steering wheel angle
(dynamic)
!Yellow lane marking tires at current
steering wheel angle(dynamic)
Yellow guide line atadistance of
approximately3ft(1.0 m) from the rear
of the vehicle
%Vehicle center axle (marker assistance)
Bumper
Red guide line atadistance of
approximately 12 in (0.30 m) from the
rear of the vehicle
The guide linesare shownwhen the
transmission is in positionR.
The distance specifications only apply to
objectsthat are at ground level.
Additional messages for vehicles withPARKTRONIC
Front warning display
Additional PARKTRONIC measurement
operational readiness indicator
$Rear warning display
Vehicles with PARKTRONIC:if
PARKTRONIC is operational (Ypage 193), an
additional operational readiness indicator will
appearinCOMAND display.Ifthe
PARKTRONIC warning displays are active or
light up, warning displaysand$are also
active or light up correspondingly in the
COMAND display.
Driving systems201
Driving and parking
Z

Display messagesPossible causes/consequences andSolutions

VehicleRising
Your vehicleisadjustingtothelevel you haveselected.

VehicleRising
Please Wait
The vehiclelevel is toolow when thevehicleisstationary. A
warningtonealso sounds.
XDo notpull away.
The vehiclelevelisset when thedisplay message disappears.

StopVehicle
VehicleToo Low
You have pulled away while thevehiclelevelisstill toolow.
AIRMATIC setsthevehicletotheselected levelafterashort
period.
XPull overand stop the vehiclesafelyassoonaspossible,paying
attention to road and traffic conditions.
XSecure the vehicle against rolling away(Ypage 167).
XWait until the displaymessage disappears before pulling away.
AIRMATIC is defective.Awarning tone also sounds.
XDo notdriveatspeeds above50mph (80 km/h).
XMakeonlyslightsteering movements. Otherwise, the front
fender or the tires could be damagedifthe steering movement
is too large.
XListenfor scraping sounds.
XPull over and stop the vehicle safely, paying attention to road
and traffic conditions, and selectahigher vehicle level.
Depending on the malfunction, it may be possible to raise the
vehicle.
XVisitaqualified specialist workshop.

Malfunction
The AIRMATICfunction is restricted. The vehicle's handling
characteristics may be affected.
XDo not drive at speeds above 50 mph (80 km/h).
XVisitaqualified specialist workshop.

Off
The HOLD function is deactivated. The vehicle is skidding.
Awarning tone also sounds.
XReactivatetheHOLD function later(Ypage 186).
Radar Sensors
Deactivated See
Operator'sManual
The radar sensor system is deactivated.
XSwitch on theradar sensor system (Ypage 232).
252Display messages
On-boar dc omputer and displays

Tires
Display messagesPossible causes/consequencesandSolutions
Check
TirePressure Soon
The tire pressure loss warningsystem has detectedasignificant
lossinpressure.
Awarning tone also sounds.
GWARNING
Withtirepressureswhichare toolow, there isariskofthe
following hazards:
Rthey may burst, especiallyasthe load and vehicle speed
increase.
Rthey may wear excessively and/or unevenly, which may greatly
impair tire traction.
Rthe driving characteristics, as well as steering and braking, may
be greatly impaired.
There isarisk of an accident.
XStop the vehicle without making any sudden steering or braking
maneuvers. Pay attention to the traffic conditionsasyou do so.
XSecure the vehicle against rolling away (Ypage 167).
XCheck the tires and, if necessary, follow the instructions for a
flat tire (Ypage 321).
XCheck the tire pressures and, if necessary, correct the tire
pressure.
XRestart the tire pressure loss warning system when the tire
pressure is correct (Ypage 342).
CheckTirePressure
Then Restart Run
Flat Indicator
The tire pressure loss warning system generatedadisplay
message and has not been restarted since.
XSet the correct tire pressure in all four tires.
XRestart the tire pressure loss warning system (Ypage 342).
Run Flat Indicator
Inoperative
The tire pressure loss warning system is faulty.
XVisitaqualified specialist workshop.
Rectify
Tire Pressure
The tire pressure is too low in at least one of the tires, or the tire
pressure difference between the wheels is too great.
XCheck the tire pressures at the next opportunity (Ypage 342).
XIf necessary, correct the tire pressure.
XRestart the tire pressure monitor (Ypage 345).
258Display messages
On-board computer and displays

Display messagesPossible causes/consequences andSolutions
Check
Tires
The tire pressureinoneor moretires has dropped significantly.
The wheelposition is displayed in themultifunction display.
Awarning tone also sounds.
GWARNING
Withtirepressureswhichare toolow, there isariskofthe
following hazards:
Rthey may burst, especiallyasthe load and vehicle speed
increase.
Rthey may wear excessively and/or unevenly, which may greatly
impair tire traction.
Rthe driving characteristics, as well as steering and braking, may
be greatly impaired.
There isarisk of an accident.
XStop the vehicle without making any sudden steering or braking
maneuvers. Pay attention to the traffic conditionsasyou do so.
XSecure the vehicle against rolling away (Ypage 167).
XCheck the tires and, if necessary, follow the instructions for a
flat tire (Ypage 321).
XCheck the tire pressure (Ypage 342).
XIf necessary, correct the tire pressure.
Warning
Tire Malfunction
The tire pressure in one or more tires has dropped suddenly. The
wheel position is shown in the multifunction display.
GWARNING
If you drive withaflat tire, there isarisk of the following hazards:
Raflat tire affects the ability to steer or brake the vehicle.
Ryou could lose control of the vehicle.
Rcontinued driving withaflat tire will cause excessive heat build-
up and possiblyafire.
There isarisk of an accident.
XStop the vehicle without making any sudden steering or braking
maneuvers. Pay attention to the traffic conditionsasyou do so.
XSecure the vehicle against rolling away (Ypage 167).
XCheck the tires and, if necessary, follow the instructions for a
flat tire (Ypage 321).
Display messages259
On-board computer and displays
Z

Tires
ProblemPossible causes/consequencesandSolutions

The yellow tire pressure
monitor warninglamp
(pressure loss/
malfunction) is lit.
The tire pressure monitor hasdetectedalossofpressure in at
leastone of the tires.
GWARNING
With tire pressures which aretoo low, there isarisk of the
following hazards:
Rthey may burst, especially as the load and vehicle speed
increase.
Rthey may wear excessively and/or unevenly, which may greatly
impair tire traction.
Rthe driving characteristics, as well as steeringand braking, may
be greatly impaired.
There isarisk of an accident.
XStop the vehicle without making any sudden steeringorbraking
maneuvers. Pay attention to the traffic conditions as you do so.
XSecure the vehicle against rolling away (Ypage 167).
XObserve the additional display messages in the multifunction
display.
XCheck the tires and, if necessary, follow the instructions for a
flat tire (Ypage 321).
XCheck the tire pressure (Ypage 342).
XIf necessary, correctthe tire pressure.

The yellow tire pressure
monitor warning lamp
(pressure loss/
malfunction) flashes for
approximately one
minute and then
remains lit.
The tire pressure monitor is faulty.
GWARNING
The system is possibly unable to recognize or register low tire
pressure.
There isarisk of an accident.
XObserve the additional display messages in the multifunction
display.
XVisitaqualified specialist workshop.
276Indicator and warning lampsinthe instrument cluster
On-board computer and displays