2014 MERCEDES-BENZ CLS ESP

one or more tires has dropped suddenly
and the tires must be checked.
Observe the instructions and safety notes in
the display messages in the "Tires" section
(Ypage 258).
iIf the wheel positions on the vehicle are
rotated, the tire pressures may be
displayed for the wrong positions for a
short time. This is rectified afterafew
minutes of driving, and the tire pressures
are displayed for the correctpositions.
Restarting the tire pressuremonitor
When you restart the tire pressure monitor,
all existingwarning messages are deleted and
the warning lamps go out. The monitor uses
the currently set tire pressures as the
reference values for monitoring. In most
cases, the tire pressure monitor will
automatically detect the new reference
values after you have changed the tire
pressure. However, you can also define
reference values manually as described here.
The tire pressure monitor then monitors the
new tire pressure values.
XSet the tire pressure to the value
recommended for the corresponding
driving situation on the Tire and Loading
Information placard on the B-pillar on the
driver's side (Ypage 338).
Additional tire pressure values for different
loads can also be found on the tire pressure
table on the inside of the fuel filler flap
(Ypage 338).
XMake sure that the tire pressure is correct
on all four wheels.
XMake sure that the SmartKey is in position
2in the ignition lock.
XPress the\norbutton on the
steeringwheel to select theServ.menu.
XPress theorbutton to select
Tire Pressure.
XPress thebutton.
The multifunction display shows the
current tire pressure for each tire or the
Tire pressures will be displayed
after drivingafew minutes
message.
XPress thebutton.
The multifunction display shows theUse
CurrentPressuresasNewReference
Valuesmessage.
If you wish to confirm the restart:
XPress thebutton.
TheTire Press. Monitor Restarted
message appears in the multifunction
display.
After driving forafew minutes, the system
checkswhether the current tire pressures
are within the specified range. The new tire
pressures are then accepted as reference
values and monitored.
If you wish to cancel the restart:
XPress thebutton.
The tire pressure values stored at the last
restart will continue to be monitored.
Loading the vehicle
Instruction labels for tires and loads
GWARNING
Overloaded tires can overheat, causing a
blowout. Overloaded tires can also impair the
steering and driving characteristics and lead
to brake failure. There isarisk of accident.
Observe the load rating of the tires. The load
rating must be at least half of the GAWR of
your vehicle. Never overload the tires by
exceeding the maximum load.
Two instruction labels on your vehicle show
the maximum possible load.
(1) The Tire and Loading Information placard
is on the B-pillar on the driver's side. The
Tire and Loading Information placard
shows the maximum permissible number
of occupantsand the maximum
permissible vehicle load. It also contains
Loading the vehicle345
Wheels and tires
Z

details of the tire sizes and
correspondingpressures for tires
mounted at the factory.
(2) The vehicle identification plate is on the
B-pillar on the driver'sside. The vehicle
identification plate informsyou of the
gross vehicle weight rating. It is made up
of the vehicle weight, all vehicle
occupants, the fuel and the cargo. You
can also find information about the
maximum gross axle weight rating on the
front and rear axle.
The maximum gross axle weight rating is
the maximum weight that can be carried
by one axle (front or rear axle). Never
exceed the maximum load or the
maximum gross axle weight rating for the
front or rear axle.
B-pillar, driver's side
Maximumpermissible grossvehicle
weight rating
XSpecification for maximum gross vehicle
weightis listed in theTire and Loading
Information placard: "The combinedweight
of occupantsand cargo should never
exceed XXX kilogramsorXXX lbs."
The gross weight of all vehicle occupants,
load and luggage must notexceedthe
specified value.
iThe specifications shown on the Tire and
Loading Informationplacard in the
illustrationare examples. The maximum
permissible gross vehicleweight rating is
vehicle-specific and may differ from that in
the illustration. You can find the valid
maximumpermissible gross vehicle weight
ratingfor your vehicle on the Tire and
Loading Information placard.
Number of seats
Maximum number of seatsindicates the
maximum number of occupants allowed to
travel in the vehicle. This information can be
found on the Tire and Loading Information
placard.
iThe specifications shown on the Tire and
Loading Information placard in the
illustration are examples. The number of
seats is vehicle-specific and can differ from
the details shown. The number of seats in
your vehicle can be found on the Tire and
Loading Information placard.
346Loading thevehicle
Wheels and tires

Step 3
Example 1Example 2Example 3
Permissible load
(maximumgross
vehicle weight rating
fromthe Tire and
Loading Information
placard minus the
gross weight of all
occupants)
1500 lbs(680kg)
"750 lbs(340kg) =
750 lbs(340kg)
1500 lbs(680kg)
"540 lbs(245kg)
=960 lbs(435kg)
1500 lbs(680kg)
"150 lbs(68 kg) =
1350 lbs(612kg)
Vehicle identificationplate
Even if youhavecalculatedthe totalcargo
carefully, youshouldstill make sure thatthe
gross vehicle weight rating and the gross axle
weight rating are not exceeded. Details can
be found on the vehicle identification plate on
the B-pillar on the driver's side of the vehicle
(Ypage 345).
Permissible gross vehicle weight:the
gross weight of the vehicle, all passengers,
load and trailer load/noseweight (if
applicable) must not exceed the permissible
gross vehicle weight.
Gross axle weight rating:the maximum
permissible weight that can be carried by one
axle (front or rear axle).
To ensure that your vehicle does not exceed
the maximum permissible values (gross
vehicle weight and maximum gross axle
weight rating), have your loaded vehicle
(including driver, occupants, cargo, and full
trailer load if applicable) weighed on a
suitable vehicle weighbridge.
All about wheelsand tires
Uniform Tire Quality Grading
Standards
Overview of Tire Quality Grading
Standards
Uniform Tire Quality Grading Standards are
U.S. governmentspecifications. Their
purpose is to provide drivers with uniform
reliableinformation on tire performance data.
Tire manufacturers have to grade tires using
three performance factors:tread wear
grade,traction grade and$temperature
grade. These regulations do not apply to
Canada.Nevertheless, all tires sold in North
America are provided with the corresponding
quality grading markings on the sidewall of
the tire.
Where applicable, the tire grading
information can be found on the tire sidewall
between the tread shoulder and maximum
tire width.
All about wheels and tires349
Wheels and tires
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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

All-weather tires and winter tires
IndexSpeed rating
QM+S1up to 100mph (160km/h)
TM+S1up to 118mph (190km/h)
HM+S1up to 130mph (210km/h)
VM+S1up to 149mph (240km/h)
iNot all tires withtheM+S markingprovide
thedriving characteristics of wintertires.
In addition to theM+S marking, wintertires
also have thesnowflake symbol on
the tirewall. Tires with this marking fulfill
the requirements of the Rubber
Manufacturers Association (RMA) and the
Rubber Association of Canada (RAC)
regarding the tiretraction on snow. They
have been especially developed for driving
on snow.
An electronic speed limiter preventsyour
vehicle fromexceeding the following speeds:
Rallvehicles (exceptAMG vehicles):
130 mph (210 km/h)
RAMG vehicles: 155 mph (250 km/h)
RAMG vehicles with PerformancePackage:
186 mph (300 km/h)
R
The speed rating of tires mounted at the
factory may be higher than the maximum
speed that the electronic speed limiter
permits.
Make sure that your tires have the required
speed rating, e.g. when buying new tires. The
required speed rating for your vehicle can be
found in the "Tires" section (Ypage 362).
Further information about reading tire data
can be obtained from any qualified specialist
workshop.
Load index
In addition to the load bearing index, load
indexmay be imprinted after the letters
that identify speed index%on the sidewall
of the tire (Ypage 351).
RIf no specification is given: no text (as in the
example above), representsastandard
load (SL)tire
RXL or Extra Load: representsareinforced
tire
RLightLoad: representsalight load tire
RC, D, E: representsaload range that
depends on the maximum load that the tire
can carry atacertain pressure
iTire data is vehicle-specific and may
deviate from the data in the example.
Maximumload rating
Maximum tire loadis the maximum
permissible weight for which the tire is
approved.
1Or M+Sfor winter tires.
All about wheelsand tires353
Wheels and tires
Z

100 kilopascals (kPa)are the equivalent of
1bar.
DOT (Department of Transportation)
DOT marked tires fulfill the requirements of
the United States Department of
Transportation.
Normal occupant weight
The numberofoccupants for which the
vehicleisdesigned multipliedby
68 kilograms (150 lb).
Uniform Tire Quality GradingStandards
Auniform standard to grade the quality of
tireswithregards to treadquality,tire traction
and temperaturecharacteristics. Ratingsare
determinedbytire manufacturersusing U.S.
government testing procedures. The ratings
aremoldedinto the sidewall of the tire.
Recommendedtire pressure
The recommendedtire pressure appliesto
the tiresmounted at the factory.
The Tire and Loading Informationplacard
containsthe recommendedtirepressures for
cold tires onafully loaded vehicle and for the
maximum permissible vehicle speed.
The tirepressure table containsthe
recommendedpressures for cold tires for
various operating conditions, i.e. differing
load and speed conditions.
Increased vehicle weight duetooptional
equipment
This is the combined weight of all standard
and optional equipmentavailablefor the
vehicle, regardless of whetheritisactually
installed on the vehicle or not.
Rim
This is the part of the wheel on which the tire
is mounted.
GAWR (Gross Axle Weight Rating)
The GAWR is the maximum gross axle weight
rating. The actual load on an axle must never
exceed the gross axle weight rating. The
gross axle weight rating can be found on the
vehicle identification plate on the B-pillar on
the driver's side.
Speed rating
The speed rating is part of the tire
identification. It specifies the speed range for
which the tire is approved.
GVW (Gross Vehicle Weight)
The gross vehicle weight includes the weight
of the vehicle including fuel, tools, the spare
wheel, accessories installed, occupants,
luggage and the drawbarnoseweight, if
applicable. The gross vehicle weight must not
exceed the gross vehicle weight rating GVWR
as specified on the vehicle identification plate
on the B-pillar on the driver's side.
GVWR (Gross Vehicle Weight Rating)
The GVWR is the maximum permissible gross
weight ofafully loaded vehicle (the weight of
the vehicle including all accessories,
occupants, fuel, luggage and the drawbar
noseweight, if applicable). The gross vehicle
weight rating is specified on the vehicle
identification plate on the B-pillar on the
driver's side.
Maximumloaded vehicle weight
The maximum weight is thesum of:
Rthecurbweight of thevehicle
Rtheweight of theaccessories
Rtheload limit
Rtheweight of thefactory installedoptional
equipment
Kilopascal (kPa)
Metric unit for tirepressure. 6.9kPa
correspondsto1psi. Another unit for tire
pressure is bar. Thereare 100kilopascals
(kPa) to1bar.
Load index
In addition to theload-bearing index,theload
index may also be imprinted on thesidewall
of thetire. This specifiesthe load-bearing
capacity more precisely.
All about wheels and tires355
Wheels and tires
Z

GWARNING
If you tighten the wheelbolts or wheelnuts
when the vehicleisraised, the jack couldtip
over. There isarisk of injury.
Only tighten the wheelbolts or wheelnuts
when the vehicleisonthe ground.
Always pay attention to the instructions and
safety notes in the "Changingawheel"
section (Ypage357).
Only use wheelbolts that have been designed
for the wheeland the vehicle. For safety
reasons, Mercedes-Benz recommends that
you only use wheelbolts which have been
approved for Mercedes-Benz vehicles and the
respective wheel.
!AMG vehicle with ceramic brake
discs:during removaland repositioning of
the wheel, the wheelrim can strike the
ceramic-brake disc and damage it.
Therefore, take precautions and have a
second personassist you. Alternatively,
you can useasecond alignment bolt.
!To prevent damage to the paintwork, hold
the wheel securely against the wheel hub
while screwing in the first wheel bolt.
Positioningawheel (example: vehicle with anemergency spare wheel)
XCleanthe wheel and wheel hub contact
surfaces.
XSlide the wheel to be mounted onto the
alignment bolt and push it on.
XTighten the wheel bolts until they are
finger-tight.
XUnscrew the alignment bolt.
XTighten the last wheel bolt until it is finger-
tight.
XVehicles withacollapsible spare
wheel:inflate thecollapsible spare wheel
(Ypage 368).
Only then lower thevehicle.
Lowering thevehicle
GWARNING
The wheels could work loose if thewheel nuts
and boltsare not tightenedtothe specified
tightening torque. There isarisk of accident.
Have the tightening torque immediately
checked ataqualified specialist workshop
afterawheel is changed.
!Vehicles withacollapsible spare
wheel:before lowering thevehicle, inflate
thecollapsible spare wheel with thetire
inflationcompressor. The wheel rim could
otherwise be damaged.
Tighteningthe wheel nuts (example: vehicle withan emergencyspare wheel)
XTurn the crank of the jack counter-
clockwise until the vehicle is once again
standingfirmly on the ground.
XPlace the jack to one side.
XTighten the wheel bolts evenly in a
crosswise pattern in the sequence
indicated (to). The specified
tightening torque is96 lb-ft(130 Nm).
XTurn the jack back to its initial position.
Changingawheel361
Wheels and tires
Z