2014 MERCEDES-BENZ CLS brakes

Active LaneKeeping Assist
Generalnotes
Active LaneKeepingAssistmonitorsthe area
in front of your vehicle by means of
cameraat the top of the windshield. Active
Lane Keeping Assist detectslane markings on
theroad and warnsyou before you leave your
lane unintentionally. If you do notreact to the
warning,alane-correctingapplication of the
brakes can bring the vehicle back intothe
original lane.
If you have chosen the functionDisplay
Unit Speed-/Odometer:(Ypage 229)and
selected the display unitkmin the on-board
computer, Active Lane Keeping Assist
supports you fromaspeed of 60 km/h. If
milesis selected as the display unit, the
assistancerange begins at 40 mph.
For Active Lane Keeping Assist to assist you
when driving, the radar sensor system must
be operational.
Important safetynotes
If you fail to adapt your driving style, Active
Lane Keeping Assist can neither reduce the
risk of accidentnor override the laws of
physics. Active Lane Keeping Assist cannot
take into account road, weather or traffic
conditions. It cannot detect possible road and
traffic conditions. Active Lane Keeping Assist
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.
Active Lane Keeping Assist cannot
continuously keep your vehicle in its lane.
GWARNING
Active Lane Keeping Assist cannot always
clearly detect lane markings.
In such cases, Active Lane Keeping Assist
can:
Rgive an unnecessary warning and then
makeacourse-correcting brake application
to the vehicle
Rnot giveawarning or intervene
There isarisk of an accident.
Always pay particular attention to the traffic
situation and keep within the lane, especially
if Active Lane Keeping Assist alerts you.
Terminate the intervention inanon-critical
driving situation.
The system may be impaired or may not
function if:
Rthere is poor visibility, e.g. due to
insufficient illumination of the road, or due
to snow, rain, fog or spray
Rthere is glare, e.g. from oncoming traffic,
the sun or reflections (e.g. when the road
surface is wet)
Rthe windshield is dirty, fogged up, damaged
or covered, for instance byasticker, in the
vicinityofthe camera
Rthe radar sensors in the front or rear
bumper or in the radiator grill are dirty, e.g.
due to snow
Rthere are no, several or unclear lane
markings foralane, e.g. in areas with road
construction work
Rthe lane markings are worn away,dark or
covered up, e.g. by dirt or snow
Rthe distance to the vehicle in front is too
small and the lane markings thus cannot be
detected
Rthe lane markings change quickly, e.g.
lanes branch off, cross one another or
merge
214Driving systems
Driving and parking

Safety systems
Display messagesPossible causes/consequences andSolutions

Currently
Unavailable See
Operator's Manual
ABS (Anti-lock Braking System), ESP®(Electronic Stability
Program), BAS (Brake Assist), PRE-SAFE®,the HOLD function and
hill start assist are temporarily unavailable.
BAS PLUS and PRE-SAFE®Brake may also have failed.
In addition, the, andwarning lamps light up in
the instrumentcluster.
ATTENTIONASSIST is deactivated.
Possible causes are:
Rself-diagnosis is not yet complete.
Rthe on-board voltage may be insufficient.
GWARNING
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
The steerability and braking characteristics may be severely
affected. The braking distance in an emergency braking situation
can increase.
If ESP®is not operational, ESP®is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
XCarefully driveasuitable distance, making slight steering
movements, ataspeed above 12 mph (20 km/h).
If the displaymessage disappears, the functions mentioned
above are available again.
If the displaymessage continues to be displayed:
XDrive on carefully.
XVisitaqualified specialist workshop.

Inoperative See
Operator's Manual
ABS,ESP®,BAS,PRE-SAFE®,the HOLD function and hill start
assist are unavailable due toamalfunction.
The(USA only)/
(Canada only),, and
warning lamps in the instrumentcluster also light up.
ATTENTION ASSISTisdeactivated.
GWARNING
The brakesystem continues to function normally, but without the
functionslisted above. The wheels could therefore lock if you
brakehard, for example.
238Display messages
On-board computer and displays

Display messagesPossible causes/consequences andSolutions
The steerabilityand brakingcharacteristics may be severely
affected. The brakingdistanceinanemergencybrakingsituation
can increase.
If ESP®is notoperational, ESP®is unable to stabilize the vehicle.
There is an increased risk of skiddingand an accident.
XDriveoncarefully.
XVisitaqualified specialist workshop immediately.

Inoperative See
Operator's Manual
ESP®,BAS, PRE-SAFE®,the HOLD functionand hill start assist are
unavailable duetoamalfunction.
In addition, theand warning lamps light up in the
instrument cluster.
The self-diagnosisfunctionmight not be complete,for example.
ATTENTION ASSISTisdeactivated.
GWARNING
The brakesystem continues to function normally, but without the
functionslisted above.
The braking distanceinanemergency braking situation can thus
increase.
If ESP®is not operational, ESP®is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
XCarefully driveasuitable distance, making slight steering
movements,ataspeed above 12 mph (20 km/h).
If the display message disappears,the functionsmentioned
above are available again.
If the display message continues to be displayed:
XDrive on carefully.
XVisitaqualified specialist workshop.
Display messages239
On-board computer and displays
Z

Display messagesPossible causes/consequences andSolutions

Remove 'Start'
Button and Insert
Key
The KEYLESS-GO keycan continuouslynotbe detected.
KEYLESS-GO is temporarily malfunctioningorisdefective. A
warningtonealso sounds.
XInserttheSmartKey into theignition lockand turnittothe
desiredposition.
XVisitaqualified specialist workshop.

Close Doors to
LockVehicle
At leastone door is open.Awarning tone also sounds.
XClose all doorsand lockthe vehicle again.
Indicator and warning lamps in the
instrument cluster
Warning and indicator lamps
overview
Low-beam headlamps
(Ypage 118)
Parking lamps (Ypage 118)
High-beam headlamps
(Ypage 119)

Turn signal (Ypage 119)
Seat belts (Ypage 265)
(USA) Brakes (Ypage 266)

(Canada)Brakes (Ypage266)
ABS (Ypage267)
ESP®(Ypage269)
ESP®OFF (Ypage269)
SPORT handling mode in
AMG vehicles (Ypage270)
SRS (Ypage272)
\nCheck Engine (Ypage273)
Reserve fuel (Ypage273)
Coolant (Ypage273)
Distance warning signal
(Ypage275)
Tire pressure monitor
(Ypage276)
264Indicator and warninglamps in the instrument cluster
On-board computer and displays

about various special offers at your
workshop.
Rmonthly status informatione-mail on oil
level,air pressure, maintenance, brakes,
etc. If applicable,you willreceive
information on special offers in the e-mail.
USA only:this information can alsobe
called up under "Owners Online" at http://
www.mbusa.com.
Information on the data stored in the vehicle
(Ypage27).
Information on RoadsideAssistance
(Ypage23).
Downloading routes
Downloading routes allows you to transfer
and save predefined routes in the navigation
system. To do this, an SD memory card must
be inserted into the COMAND system. If no
SD memory card is inserted, you must insert
the card into the card slot on the COMAND
system before saving.
Aroute can be prepared and sent either by a
customer service representative or via the
mbrace portal on the Internet.
Each route can include up to 20 way points.
Oncearoute has been received by the
navigation system, you will see the name>hasbeensavedtomemorycard.
Do you want to start route
guidance?message in the COMAND display.
The route is saved to the SD memory card.
XTo startrouteguidance:selectYes.
An overview of the route is shown in the
display.
iIf you selectNo,the saved route can be
called up later via the navigation menu.
XSelectStart.
Route guidance is started.
iDownloaded and saved data can be called
up again in COMAND.
You can find further information in the
separate COMAND Operating Instructions.
Speed alert
You can define the upper speed limit, which
must not be exceeded by the vehicle. If this
selected speed is exceeded by the vehicle, a
message will be sent to the Customer
Assistance center. The Customer Assistance
center then forwards this information to you.
You can select the way in which you receive
this information beforehand. Possible options
include text message, e-mail or an automated
call.
The data which is sent to the Customer
Assistance Center contains the following
information:
Rthe location where the speed limit was
exceeded
Rthe time at which the speed limit was
exceeded
Rthe selected speed limit which was
exceeded
Geo fencing
Geo fencing allows you to select areas which
the vehicle should not enter or leave. You will
be informed if the vehicle crosses the
boundaries of the selected areas. You can
select the way in which you receive this
information beforehand. Possible options
include text message, e-mail or an automated
call.
The area can be determined as eitheracircle
orapolygon withamaximum of ten corners.
You can specify up to ten areas
simultaneously. Different settings are
possible for each area.
USA only: these settings can be called up
under "Owners Online" at http://
www.mbusa.com.
Alternatively, you can trigger an MB Info call
and inform the customer service
representative that you wish to activate geo
fencing.
Currently inactive areas can be activated by
text message.
298Features
Stowage and features

Under these or similarconditions, have, for
example, the air filter, engine oil and oil filter
replaced or changed more frequently. Under
arduous operating conditions, the tires must
be checked more often.Further information
can be obtained ataqualified specialist
workshop, e.g. an authorized Mercedes-Benz
Center.
Driving abroad
An extensive Mercedes-Benz Servicenetwork
is also available in other countries. You can
obtain further information from any
authorized Mercedes-Benz Center.
Care
General notes
HEnvironmental note
Dispose of empty packagingand cleaning
clothsinanenvironmentally responsible
manner.
!For cleaningyour vehicle, do not use any
of the following:
Rdry, rough or hard cloths
Rabrasive cleaningagents
Rsolvents
Rcleaningagents containingsolvents
Do not scrub.
Do not touch the surfaces or protective
films with hard objects, e.g.aring or ice
scraper. You could otherwise scratch or
damage the surfaces and protective film.
!Do not park the vehicle for an extended
period straight after cleaningit, particularly
after having cleaned the wheels with wheel
cleaner. Wheel cleaners could cause
increased corrosion of the brake discs and
brake pads/linings. For this reason, you
should drive forafew minutes after
cleaning. Braking heats the brake discs and
the brake pads/linings, thus drying them.
The vehicle can then be parked.
Regular care of your vehicle isacondition for
retaining the quality in the long term.
Use care productsand cleaningagents
recommended and approved by Mercedes-
Benz.
Washing the vehicle and cleaning the
paintwork
Automatic car wash
GWARNING
Braking efficiency is reduced after washing
the vehicle. There isarisk of an accident.
After the vehicle has been washed, brake
carefully while paying attention to the traffic
conditions until full brakingpower is restored.
!If DISTRONIC PLUS or the HOLD function
is activated, the vehicle brakes
automatically in certain situations. To
preventdamage to thevehicle,deactivate
DISTRONICPLUS and the HOLD function in
the following or other similar situations:
Rwhen towing the vehicle
Rin the car wash
!Never clean yourvehicle inaTouchless
Automatic Car Wash as these use special
cleaningagents.These cleaning agents can
damage the paintwork or plastic parts.
!Make sure that:
Rthe side windows and the sliding sunroof
are fully closed.
Rthe ventilation/heating is switched off
(the OFF button has been pressed).
Rthe windshield wiper switch is in position
0.
Otherwise, the vehicle might be damaged.
!In car washes withatowing mechanism,
make sure that the automatic transmission
is in transmission positionN,otherwise the
vehicle could be damaged.
RVehicles withaSmartKey:
Care311
Maintenance and care
Z

XFirst, remove the jumper cablesfrom earth pointand negative terminal!,then from
positiveclampand positiveterminal$.Begineachtime at the contacts on your own
vehicle first.
XClose coverof positiveclampafterremoving the jumper cables.
XHave the battery checkedataqualified specialist workshop.
iJump-startingisnot considered to beanormal operatingcondition.
iJumper cables and further information regardingjump-starting can be obtained at any
qualified specialist workshop.
Towing and tow-starting
Importantsafetynotes
GWARNING
Functionsrelevant to safety are restricted or
no longer available if:
Rthe engineisnot running.
Rthe brake system or the power steering is
malfunctioning.
Rthereisamalfunction in the voltage supply
or the vehicle's electrical system.
If your vehicle is being towed, much more
forcemay be necessary to steer or brake.
There isarisk of an accident.
In such cases, useatow bar. Beforetowing,
make sure that the steering moves freely.
GWARNING
If the weight of the vehicle to be towed or tow-
started is greater than the permissible gross
weight of your vehicle:
Rthe towingeye could detach itself
Rthe vehicle/trailer combination could
rollover.
There isarisk of an accident.
When towingortow-starting another vehicle,
its weight should not be greater than the
permissible gross weight of your vehicle.
Information on your vehicle's gross vehicle
weight ratingcan be found on the vehicle
identification plate (Ypage 372).
!If DISTRONIC PLUS or the HOLD function
is activated, the vehicle brakes
automatically in certain situations. To
preventdamage to thevehicle,deactivate
DISTRONICPLUS and the HOLD function in
the following or other similar situations:
Rwhen towing the vehicle
Rin the car wash
!Only secure the tow rope or tow bar at the
towing eyes. Otherwise,the vehicle could
be damaged.
!Do not use the towing eye for recovery,
this could damage the vehicle.Ifindoubt,
recover the vehicle withacrane.
!When towing, pullawayslowly and
smoothly.Ifthe tractive power is too high,
the vehicles could be damaged.
!Do not tow with sling-type equipment.
This could damage the vehicle.
!When towing vehicles with KEYLESS-GO,
use the key instead of the Start/Stop
button. Otherwise, the automatic
transmission may shift to positionPwhen
the driver's or front-passenger door are
opened, which could lead to damage to the
transmission.
!The vehicle can be towedamaximum of
30 miles (50km). The towing speed of
30 mph (50 km/h) must not be exceeded.
If the vehicle has to be towed more than
30 miles(50km), the entire vehicle must be
raised and transported.
328Towing and tow-starting
Breakdown assistance

Useful information
iThis Operator's Manual describes all
models and all standard and optional
equipment of your vehicle available at the
time of publication of the Operator's
Manual. Country-specific differences are
possible. Please notethat your vehicle may
not be equipped with all features
described. This also applies to safety-
related systemsand functions.
iRead the information on qualified
specialist workshops: (Ypage 26).
Important safetynotes
GWARNING
If wheels and tires of the wrong size are used,
the wheel brakes or suspension components
may be damaged. There isarisk of an
accident.
Always replacewheels and tires with those
that fulfill the specifications of the original
part.
When replacing wheels, make sure to use the
correct:
Rdesignation
Rmodel
When replacing tires, make sure to use the
correct:
Rdesignation
Rmanufacturer
Rmodel
GWARNING
Aflat tireseverely impairs the driving,
steeringand braking characteristics of the
vehicle. There isarisk of accident.
Tires without run-flat characteristics:
Rdo not drive withaflat tire.
Rimmediately replacethe flat tirewith your
emergencyspare wheel or spare wheel, or
consultaqualified specialist workshop.
Tires with run-flat characteristics:
Rpay attention to the information and
warningnotices on MOExtended tires (tires
with run-flat characteristics).
Accessories that are not approved for your
vehicle by Mercedes-Benzorthat are not
being used correctly can impair the operating
safety.
Before purchasing and using non-approved
accessories, visitaqualified specialist
workshop and inquire about:
Rsuitability
Rlegal stipulations
Rfactory recommendations
Information on the dimensions and types of
wheels and tires for your vehicle can be found
in the "Wheel/tire combinations" section
(Ypage 362).
Information on air pressure for the tires on
your vehicle can be found:
Ron the vehicle's Tire and Loading
Information placard on the B-pillar
(Ypage 345)
Ron the tire pressure label on the fuel filler
flap (Ypage 165)
Runder "Tire pressure" (Ypage 338)
Operation
Information on driving
If the vehicle is heavily loaded, check the tire
pressures and correct them if necessary.
While driving, pay attention to vibrations,
noises and unusual handling characteristics,
e.g. pulling to one side. This may indicate that
the wheels or tires are damaged. If you
suspect thatatire is defective, reduce your
speed immediately. Stop the vehicle as soon
as possible to check the wheels and tires for
damage. Hidden tire damage could also be
causing the unusual handling characteristics.
If you find no signs of damage, have the tires
334Operation
Wheels and tires