service MERCEDES-BENZ CLS 2014 Service Manual

The battery and the cover of the positive
terminal clamp must be installed securely
during operation.
Comply with safety precautions and take
protective measures when handling
batteries.
Risk of explosion.
Fire, open flames and smokingare
prohibited when handling the
battery. Avoid creatingsparks.
Battery acid is caustic. Avoid
contact with skin, eyes or clothing.
Wear suitable protective clothing,
especially gloves, apron and
faceguard.
Rinse any acid spills immediately
with clear water. Contact a
physician if necessary.
Wear eye protection.
Keep children away.
Observe this Operator's Manual.
For safety reasons, Mercedes-Benz
recommends that you only use batteries
which have been tested and approved for
your vehicle by Mercedes-Benz.These
batteries provide increased impact
protection to prevent vehicle occupants from
suffering acid burns should the battery be
damaged in the event of an accident.
In order for the battery to achieve the
maximum possible service life, it must always
be sufficiently charged.
The vehicle battery, like other batteries, can
discharge over time if you do not use the
vehicle. In this case, have the battery
disconnected ataqualified specialist
workshop. You can also charge the battery
withacharger recommended by Mercedes-
Benz.Contactaqualified specialist workshop
for further information.
Have the battery condition of charge checked
more frequently if you use the vehicle mainly
for short trips or if you leave it standingidle
foralengthy period. Consultaqualified
specialist workshop if you wish to leave your
vehicle parked foralong period of time.
iRemove the SmartKey if you park the
vehicle and do not require any electrical
consumers. The vehicle will then use very
little energy, thus conserving battery
power.
iIf the power supply has been interrupted,
e.g. if you reconnect the battery, you will
have to:
Rset the clock.Information on setting the
clock can be found in the separate
operating instructions.
On vehicles with COMAND and a
navigation system, the clock is set
automatically.
Rreset the function for folding the exterior
mirrors in/out automatically, by folding
the mirrors out once (Ypage 110).
Charging the battery
GWARNING
During charging and jump-starting, explosive
gases can escape from the battery. There is a
risk of an explosion.
Particularly avoid fire, open flames, creating
sparks and smoking. Ensure there is sufficient
ventilation while charging and jump-starting.
Do not lean overabattery.
GWARNING
Battery acid is caustic. There isarisk of injury.
Avoid contact with the skin, eyes or clothing.
Do not inhale any battery gases. Do not lean
324Battery (vehicle)
Breakdown assistance

over the battery. Keep children away from
batteries. Wash battery acid immediately with
water and seek medical attention.
GWARNING
Adischarged battery can freeze at
temperatures below freezingpoint.When
jump-starting the vehicle or charging the
battery, gases can escape from the battery.
There isarisk of an explosion.
Allow the frozen battery to thaw out before
charging it or jump-starting.
!Only use battery chargers with a
maximum charging voltage of 14.8 V.
!Only charge the battery using the jump-
startingconnection point.
The jump-starting connection point is in the
engine compartment(Ypage 326).
XOpen the hood (Ypage 306).
XConnect the battery charger to the positive
terminal and ground point in the same
order as when connecting the donor
battery in the jump-starting procedure
(Ypage 326).
If, at low temperatures, the indicator lamps/
warning lamps in the instrumentcluster do
not light up, it is highly likely that the
discharged battery has frozen.Inthis case,
you may neither charge the battery nor jump-
start the vehicle. The service life ofathawed-
out battery may be shorter. The starting
characteristics may be impaired, especiallyat
low temperatures. Have the thawed-out
battery checked ataqualified specialist
workshop.
Never chargeabattery still installed in the
vehicle unlessabattery charger unit
approved by Mercedes-Benzisbeing used. A
battery charger unit speciallyadapted for
Mercedes-Benz vehicles and tested and
approved by Mercedes-Benz is available as an
accessory. It permits the charging of the
battery in its installed position. Contact an
authorized Mercedes-Benz Center for further
information and availability. Read the battery
charger's operating instructions before
charging the battery.
Battery (vehicle)325
Breakdown assistance
Z

and wheels checked ataqualified specialist
workshop.
When parking your vehicle,makesure that
thetires do notget deformed by the curb or
other obstacles. If it is necessary to drive over
curbs, speed humps or similar elevations, try
to do so slowly and at an obtuse angle.
Otherwise, the tires, particularly the
sidewalls, may be damaged.
Regular checking of wheels and tires
GWARNING
Damaged tires can cause tire inflation
pressure loss. Asaresult, you could lose
control of your vehicle. There isarisk of
accident.
Check the tires regularly for signs of damage
and replace any damaged tires immediately.
Regularly checkthe wheels and tires of your
vehicle for damage at least onceamonth, as
well as after driving off-road or on rough
roads. Damaged wheels can causealoss of
tire pressure. Pay particular attention to
damage such as:
Rcuts in the tires
Rpunctures
Rtears in the tires
Rbulges on tires
Rdeformation or severe corrosion on wheels
Regularly check the tire tread depth and the
condition of the tread across the whole width
of the tire (Ypage 335). If necessary, turn
the front wheels to full lock in order to inspect
the inner side of the tire surface.
All wheels must haveavalve cap to protect
the valve against dirt and moisture. Do not
mount anything onto the valve other than the
standard valve cap or other valve caps
approved by Mercedes-Benzfor your vehicle.
Do not use any other valve caps or systems,
e.g. tire pressure monitoring systems.
Regularly check the pressure of all the tires
particularly prior to long trips. Adjust the tire
pressure as necessary (Ypage 338).
Observe the notes on the emergencyspare
wheel (Ypage 367).
The service life of tires depends, among other
things, on the following factors:
RDrivingstyle
RTire pressure
RDistance covered
Important safety notes on the tire
tread
GWARNING
Insufficient tire tread will reduce tire traction.
The tire is no longer able to dissipate water.
This means that on wet road surfaces, the risk
of hydroplaning increases, in particular where
speed is not adapted to suit the driving
conditions. There isarisk of accident.
If the tire pressure is too high or too low, tires
may exhibit different levels of wear at
different locations on the tire tread. Thus, you
should regularly check the tread depth and
the condition of the tread across the entire
width of all tires.
Minimum tire tread depth for:
RSummer tires:in (3 mm)
RM+S tires:in (4 mm)
For safety reasons, replace the tires before
the legally prescribed limit for the minimum
tire tread depth is reached.
Operation335
Wheels and tires
Z

Ryou adoptaverysporty driving style
(cornering at high speeds or driving with
high rates of acceleration).
Ryou are driving withaheavy load(in the
vehicleoronthe roof).
Restarting the tire pressure loss
warningsystem
Restart the tire pressure loss warning system
if you have:
Rchanged the tire pressure
Rchanged the wheels or tires
Rmounted new wheels or tires
XBefore restarting, make sure that the tire
pressures are set properly on all four tires
for the respective operating conditions.
The recommendedtire pressures can be
found on the Tire and Loading Information
placard on the B-pillar on the driver's side
or the tire pressure table on the fuel filler
flap.The tire pressure loss warning system
can only give reliablewarnings if you have
set the correct tire pressure. If an incorrect
tire pressure is set, these incorrectvalues
will be monitored.
XAlsoobservethenotesinthesectionontire
pressures (Ypage 338).
XMake sure that the SmartKey is in position
2in the ignition lock (Ypage 147).
XPress the\norbutton on the
steeringwheel to selecttheServ.menu.
XPress theorbutton on the
steering wheel to select theTire
Pressuremenu.
XPress thebutton.
TheRun Flat Indicator Active
Press 'OK' to Restartmessage
appears in the multifunction display.
If you wish to confirm the restart:
XPress thebutton.
TheTire Pressure Now OK?message
appears in the multifunction display.
XPress theorbutton to select
Yes.
XPress thebutton.
TheRun Flat Indicator Restarted
message appears in the multifunction
display.
Afterateach-in period, the tire pressure
loss warning system will monitor the set
tire pressures of all four tires.
If you wish to cancel the restart:
XPress thebutton.
or
XWhen theTire Pressure Now OK?
message appears, press the
orbutton to selectCancel.
XPress thebutton.
The tire pressure values stored at the last
restart will continue to be monitored.
Tire pressuremonitor
General notes
Ifatire pressure monitor is installed, the
vehicle's wheels have sensors that monitor
the tire pressures in all four tires. The tire
pressure monitor warns you if the pressure
drops in one or more of the tires. The tire
pressure monitor only functions if the correct
sensors are installed on all wheels.
Information on tire pressures is displayed in
the multifunction display. Afterafew minutes
of driving, the current tire pressure of each
tire is shown in theServicemenu of the
multifunction display. For further information
on displaying this message, refer to the
"Checking the tire pressure electronically"
section (Ypage 344).
342Check
Wheels and tires

Example:
RTreadweargrade:200
RTractiongrade:AA
RTemperature grade:A
All passengercar tires must conform to the
statutory safety requirements in additionto
these grades.
iTheactual values for tires arevehicle-
specificand maydeviate from the values in
the illustration.
Treadwear
The treadweargrade isacomparative rating
based on the wearrate of thetirewhen tested
undercontrolled conditions onaspecified
U.S. government course. For example,atire
graded 150 would wear one and one-half
times as well on the government course as a
tire graded 100.
The relative performanceoftires depends
upon the actual conditions of their use,
however, and may depart significantly from
the norm, due to variations in driving habits,
service practices and differences in road
characteristics and climate conditions.
Traction
GWARNING
The traction grade assigned to this tire is
based on straight-ahead braking traction
tests, and does not include acceleration,
cornering, hydroplaning, or peak traction
characteristics.
!Avoid wheelspin. This can lead to damage
to the drive train.
The traction grades, from highest to lowest,
are AA, A, B, and C. Those grades represent
the tire's ability to stop onawet surface as
measured under controlled conditions on
specified government test surfaces of asphalt
and concrete.Atire markedCmay have poor
traction performance.
The safe speed onawet, snowcovered or icy
road is always lower than on dry road
surfaces.
You should pay special attention to road
conditions when temperatures are around
freezingpoint.
Mercedes-Benzrecommendsaminimum
tread depthofin(4mm)onall four winter
tires. Observe the legally required minimum
tire tread depth (Ypage335). Winter tires can
reduce the braking distance on snow-covered
surfaces in comparison with summer tires.
The braking distance is still much further than
on surfaces that are not icy or covered with
snow. Take appropriate care when driving.
Further informationonwinter tires (M+S
tires) (Ypage336).
Temperature
GWARNING
The temperature grade for this tire is
established foratire that is properly inflated
and not overloaded. Excessive speed,
underinflation, or excessive loading, either
separately or in combination, can cause
excessive heat build-up and possible tire
failure.
The temperature grades areA(the highest),
B, and C. Theserepresent the tire's
resistancetothe generationofheat and its
ability to dissipate heat when tested under
controlled conditions onaspecified indoor
laboratory test wheel. Sustained high
temperature can cause the material of the tire
to degenerateand reduce tire life, and
excessive temperature can lead to sudden
tire failure. The gradeCcorresponds toalevel
of performancewhich all passenger car tires
must meet under the Federal Motor Vehicle
Safety Standard No. 109. GradesBand A
represent higher levels of performanceonthe
laboratory test wheel than the minimum
required by law.
350All about wheelsand tires
Wheels and tires

calculatedbydividing the tire width by the tire
height.
Tire code:tire code$specifies the tire type.
"R"represents radialtires; "D" represents
diagonaltires; "B" represents diagonalradial
tires.
Optionally, tireswithamaximum speed of
over149 mph (240 km/h)may have "ZR" in
the size description, depending on the
manufacturer (e.g. 245/40 ZR 18).
Rim diameter:rim diameter!is the
diameter of the beadseat, not the diameter
of the rim flange. The rim diameter is
specified in inches(in).
Load-bearingindex:load-bearing index
isanumericalcode that specifies the
maximum load-bearing capacity ofatire.
Do not overload the tiresbyexceedingthe
specified load limit. The maximum
permissibleload can be found on the
vehicle's Tireand LoadingInformation
placard on theB-pillar on thedriver's side
(Ypage 345).
Example:
Load-bearingindex 91 indicatesamaximum
load of 1356 lb (615kg)that thetires can
bear.Forfurther information on themaximum
tireload in kilograms and lbs, see
(Ypage 353).
For further informationontheload bearing
index,see "Load index"(Ypage 353).
Speed rating:speedrating%specifiesthe
approved maximum speedofthetire.
iTire dataisvehicle-specific and may
deviate from thedataintheexample.
Regardless of thespeedrating,always
observethespeedlimits. Drive carefullyand
adapt your driving style to thetraffic
conditions.
Summer tires
IndexSpeed rating
Qup to 100mph (160km/h)
Rup to 106mph (170km/h)
IndexSpeed rating
Sup to 112mph (180km/h)
Tup to 118mph (190km/h)
Hup to 130mph (210km/h)
Vup to 149mph (240km/h)
Wup to 168mph (270km/h)
Yup to 186mph (300km/h)
ZR...Yup to 186mph (300km/h)
ZR...(..Y)over186mph (300km/h)
ZRover149mph (240km/h)
ROptionally, tires withamaximum speedof
over149mph (240km/h) may have "ZR"
in thesizedescription,dependingonthe
manufacturer (e.g. 245/40 ZR18).
The servicespecificationismade up of
load-bearing indexand speed rating
%.
RIf the size description of your tire includes
"ZR"and there are no service
specifications, ask the tire manufacturer in
order to find out the maximum speed.
Ifaservice specification is available, the
maximum speed is limited according to the
speed rating in the service specification.
Example: 245/40ZR18 97Y.In this
example, "97 Y" is the service specification.
The letter "Y" represents the speed rating.
The maximum speed of the tire is limited to
186 mph (300 km/h).
RThe size descriptionfor all tires with
maximum speeds of over 186 mph
(300 km/h) must include "ZR",andthe
service specification must be given in
parentheses. Example:
275/40 ZR 18 (99 Y). Speed rating "(Y)"
indicates that the maximum speed of the
tire is over 186 mph (300 km/h).Ask the
tire manufacturer about the maximum
speed.
352All about wheelsand tires
Wheels and tires

Useful information............................372
Information regarding technical
data....................................................372
Warranty............................................372
Identification plates.........................372
Service products and filling capaci-
ties.....................................................373
Vehicle data......................................379
371
Technical data

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).
Information regarding technical data
iThe data stated here specifically refersto
avehicle with standard equipment.Consult
an authorized Mercedes-Benz Center for
the data for all vehicle variants and trim
levels.
Warranty
Your vehicle is covered under the terms of the
warranties printed in the Serviceand
Warranty Information booklet.
Your authorized Mercedes-Benz Center will
replace and repair all factory-installed parts
in accordancewith the following warranty
terms and conditions:
RNew Vehicle Limited Warranty
REmission Systems Warranty
REmission Performance Warranty
RCalifornia, Connecticut, Maine,
Massachusetts, New York, Pennsylvania,
Rhode Island and Vermont Emission
Control System Warranty
RStatewarranty enforcement laws (Lemon
Laws)
Replacement parts and accessories are
covered by the Mercedes-Benz Parts and
Accessories warranties. These are available
at any authorized Mercedes-Benz Center.
iIf you lose the Serviceand Warranty
Information booklet, contact an authorized
Mercedes-Benz Center to arrange a
replacement.Itwill be mailed to you.
Identification plates
Vehicle identification plate with
vehicle identification number (VIN)
XOpen the driver's door.
You will see vehicle identification plate.
Example: vehicle identification plate (USA only)
VIN
$Paint code
372Identification plates
Technica ld ata

Example: vehicleidentification plate (Canada only)
VIN
$Paint code
iThe data shown on the vehicle
identificationplate is used only as an
example. This data is differentfor every
vehicle and can deviate from the data
shown here. You can find the data
applicabletoyour vehicle on the vehicle
identification plate.
VIN
XSlide the right-hand front seat to its
rearmost position.
XFold floor coveringupwards.
You will see VIN.
The VIN can also be found in the following
locations:
Ron the lower edge of the windshield
(Ypage 373)
Ron the vehicle identification plate
(Ypage 372)
Engine number
Emission control information plate,
including the certification of both federal
and Californian emissions standards
Engine number (stamped into the
crankcase)
$VIN (on the lower edge of the windshield)
Service products and filling
capacities
Important safety notes
GWARNING
Serviceproducts may be poisonous and
hazardous to health. There isarisk of injury.
Comply with instructions on the use, storage
and disposal of service products on the labels
of the respective original containers. Always
store service products sealed in their original
containers. Always keep service products out
of the reach of children.
HEnvironmental note
Dispose of service products in an
environmentally responsible manner.
Serviceproducts include the following:
RFuels
RLubricants (e.g. engine oil, transmission oil)
RCoolant
RBrake fluid
RWindshield washer fluid
RClimate control system refrigerant
Service products and filling capacities373
Technical data
Z

Comply withall valid regulationswithrespect
to handling, storing,and disposingofservice
fluids.
Components and serviceproductsmust be
matched. You should thereforeonly use
products thathave been tested and approved
by Mercedes-Benz.
Information on tested and approved products
can be obtainedatanauthorized Mercedes-
BenzCenterorontheInternet at
http://bevo.mercedes-benz.com.
You can recognize service products approved
by Mercedes-Benzbythefollowing
inscription on thecontainers:
RMB-Freigabe (e.g. MB-Freigabe 229.51)
RMB Approval (e.g. MB Approval 229.51)
Other designationsorrecommendations
indicatealevel of qualityoraspecification in
accordance withanMBSheet number (e.g.
MB 229.5). Theyhave notnecessarily been
approved by Mercedes-Benz.
Fuel
Important safetynotes
GWARNING
Fuel is highly flammable. If you handle fuel
incorrectly, there isarisk of fire and
explosion.
You must avoid fire, open flames, creating
sparks and smoking. Switchoff the engine
and, if applicable, the auxiliary heating before
refueling.
GWARNING
Fuel is poisonous and hazardous to health.
There isarisk of injury.
You must make sure that fuel does not come
into contact with your skin,eyes or clothing
and that it is not swallowed. Do not inhale fuel
vapors. Keep fuel away from children.
If you or otherscome into contact with fuel,
observe the following:
RWash away fuel from skin immediately
using soap and water.
RIf fuel comes into contact with your eyes,
immediately rinse them thoroughly with
clean water. Seek medical assistance
without delay.
RIf fuel is swallowed, seek medical
assistancewithout delay. Do not induce
vomiting.
RImmediately change out of clothing which
has come into contact with fuel.
Tank capacity
ModelTotal
capacity
All models21.1USgal
(80.0l)
ModelOf which
reserve
All models (except for
AMG vehicles)
Approx.
2.4 US qt
(9.0 l)
All models (AMG vehicles)Approx.
3.7 US gal
(14.0l)
Gasoline
Fuel grade
!Do not use diesel to refuel vehicles with a
gasoline engine. Do not switch on the
ignition if you accidentally refuel with the
wrong fuel. Otherwise, the fuel will enter
the fuel system. Even small amounts of the
wrong fuel could result in damage to the
fuel system and the engine. Notifya
qualified specialist workshopand have the
fuel tank and fuel lines drained completely.
374Service products and filling capacities
Technical data