MERCEDES-BENZ CLA 2019 Owners Manual

Uniform Tire Quality Grading Standards
A uniform standard to grade the quality of tireswith regards to tread quality, tire traction andtemperature characteristics. The quality grad-ing assessment is made by the manufacturerfollowing specifications from the U.S. govern-ment. The ratings are molded into the sidewall ofthe tire.
Recommended tire pressures
The recommended tire pressure applies to thetires mounted at the factory.
The Tire and Loading Information placard con-tains the recommended tire pressures for coldtires on a fully loaded vehicle and for the maxi-mum permissible vehicle speed.
The tire pressure table contains the recommen-ded pressures for cold tires for various operat-ing conditions, i.e. differing load and speed con-ditions.
Increased vehicle weight due to optional
equipment
The combined weight of all standard andoptional equipment available for the vehicle,regardless of whether it is actually installed onthe vehicle or not.
Rim
This is the part of the wheel on which the tire ismounted.
GAWR (Gross Axle Weight Rating)
The GAWR is the maximum gross axle weightrating. The actual load on an axle must neverexceed the gross axle weight rating. The grossaxle weight rating can be found on the vehicleidentification plate on the B-pillar on the driver'sside.
Speed rating
The speed rating is part of the tire identification.It specifies the speed range for which the tire isapproved.
GVW (Gross Vehicle Weight)
The gross vehicle weight includes the weight ofthe vehicle including fuel, tools, the spare wheel,accessories installed, occupants, luggage andthe drawbar noseweight, if applicable. The grossvehicle weight must not exceed the gross vehi-cle weight rating GVWR as specified on the vehi-cle identification plate on the B-pillar on thedriver's side.
GVWR (Gross Vehicle Weight Rating)
The GVWR is the maximum permissible grossweight of a fully loaded vehicle (the weight of thevehicle including all accessories, occupants,fuel, luggage and the drawbar noseweight, ifapplicable). The gross vehicle weight rating isspecified on the vehicle identification plate onthe B-pillar on the driver's side.
Maximum loaded vehicle weight
The maximum weight is the sum of:
Rthe curb weight of the vehicle
Rthe weight of the accessories
Rthe load limit
Rthe weight of the factory installed optionalequipment
Kilopascal (kPa)
Metric unit for tire pressure. 6.9 kPa corre-sponds to 1 psi. Another unit for tire pressure isbar. 100 kilopascals (kPa) are the equivalent of1 bar.
Load index
In addition to the load-bearing index, the loadindex may also be imprinted on the sidewall ofthe tire. This specifies the load-bearing capacitymore precisely.
Curb weight
The weight of a vehicle with standard equipmentincluding the maximum capacity of fuel, oil andcoolant. It also includes the air-conditioning sys-tem and optional equipment if these are instal-led in the vehicle, but does not include passen-gers or luggage.
Maximum load rating
The maximum tire load is the maximum permis-sible weight in kilograms or lbs for which a tire isapproved.
Maximum permissible tire pressure
Maximum permissible tire pressure for one tire.
Maximum load on one tire
Maximum load on one tire. This is calculated bydividing the maximum axle load of one axle bytwo.
All about wheels and tires309
Wheels and tires
Z

PSI (pounds per square inch)
A standard unit of measure for tire pressure.
Aspect ratio
Relationship between tire height and tire widthin percent.
Tire pressure
This is pressure inside the tire applying an out-ward force to each square inch of the tire's sur-face. The tire pressure is specified in pounds persquare inch (psi), in kilopascal (kPa) or in bar.The tire pressure should only be corrected whenthe tires are cold.
Cold tire pressure
The tires are cold:
Rif the vehicle has been parked with the tiresout of direct sunlight for at least three hoursand
Rif the vehicle has not been driven further than1 mile (1.6 km)
Tread
The part of the tire that comes into contact withthe road.
Bead
The tire bead ensures that the tire sits securelyon the wheel. There are several steel wires in thebead to prevent the tire from coming loose fromthe wheel rim.
Sidewall
The part of the tire between the tread and thebead.
Weight of optional extras
The combined weight of those optional extrasthat weigh more than the replaced standardparts and more than 2.3 kg (5 lbs). Theseoptional extras, such as high-performancebrakes, level control, a roof rack or a high-per-formance battery, are not included in the curbweight and the weight of the accessories.
TIN (Tire Identification Number)
This is a unique identifier which can be used bya tire manufacturer to identify tires, for examplefor a product recall, and thus identify the pur-chasers. The TIN is made up of the manufactur-er's identity code, tire size, tire type code andthe manufacturing date.
Load bearing index
The load bearing index (also load index) is a codethat contains the maximum load bearing capa-city of a tire.
Traction
Traction is the result of friction between the tiresand the road surface.
Treadwear indicators
Narrow bars (tread wear bars) that are distrib-uted over the tire tread. If the tire tread is levelwith the bars, the wear limit of

Tire-mounting tools should not be used nearthe valve. This could damage the electroniccomponents.
Only have tires changed at a qualified spe-cialist workshop.
Observe the instructions and safety notes in the"Changing a wheel" section (Ypage 310).
The wear patterns on the front and rear tiresdiffer, depending on the operating conditions.Rotate the wheels before a clear wear patternhas formed on the tires. Front tires typicallywear more on the shoulders and the rear tires inthe center.
On vehicles that have the same size front andrear wheels, you can rotate the wheels accord-ing to the intervals in the tire manufacturer'swarranty book in your vehicle documents. If nowarranty book is available, the tires should berotated every 3,000 to 6,000 miles (5,000 to10,000 km). Depending on tire wear, this maybe required earlier. Do not change the directionof wheel rotation.
Clean the contact surfaces of the wheel and thebrake disc thoroughly every time a wheel is rota-ted. Check the tire pressure and, if necessary,restart the tire pressure loss warning system(Canada only) or the tire pressure monitor (USAonly).
Direction of rotation
Tires with a specified direction of rotation haveadditional benefits, e.g. if there is a risk of hydro-planing. These advantages can only be gained ifthe tires are installed corresponding to thedirection of rotation.
An arrow on the sidewall of the tire indicates itscorrect direction of rotation.
Storing wheels
Store wheels that are not being used in a cool,dry and preferably dark place. Protect the tiresfrom oil, grease, gasoline and diesel.
Mounting a wheel
Preparing the vehicle
XStop the vehicle on solid, non-slippery andlevel ground.
XApply the electric parking brake manually.
XBring the front wheels into the straight-aheadposition.
XShift the transmission to position].
XSwitch off the engine.
XVehicles without KEYLESS-GO:remove theSmartKey from the ignition lock.
XVehicles with KEYLESS-GO start-functionor KEYLESS-GO:open the driver's door.The vehicle electronics are now in position

Securing the vehicle to prevent it from
rolling away
If your vehicle is equipped with a wheel chock, itcan be found in the tire-change tool kit(Ypage 274).
The folding wheel chock is an additional safetymeasure to prevent the vehicle from rollingaway, for example when changing a wheel.
XFold both plates upC.
XFold out lower plateD.
XGuide the lugs on the lower plate fully into theopenings in base plate

XUsing lug wrenchC, loosen the bolts on thewheel you wish to change by about one fullturn. Do not unscrew the bolts completely.
Jacking points
The jacking points are located just behind thefront wheel housings and just in front of the rearwheel housings (arrows).
Mercedes-AMG vehicles and vehicles withAMG Line:to protect the vehicle body, the vehi-cle has covers installed next to the jackingpoints on the outer sills.
Covers, front (example: vehicles with AMG Line)
XMercedes-AMG vehicles and vehicleswith AMG Line:fold coverDupwards.
XTake ratchet wrench

bolts to come loose. As a result, you could
lose a wheel while driving. There is a risk of
accident.
Never oil or grease wheel bolts. In the event of
damage to the threads, contact a qualified
specialist workshop immediately. Have the
damaged wheel bolts or hub threads
replaced/renewed. Do not continue driving.
GWARNING
If you tighten the wheel bolts or wheel nuts
when the vehicle is raised, the jack could tip
over. There is a risk of injury.
Only tighten the wheel bolts or wheel nuts
when the vehicle is on the ground.
Always pay attention to the instructions andsafety notes in the "Changing a wheel" section(Ypage 310).
Only use wheel bolts that have been designedfor the wheel and the vehicle. For safety rea-sons, Mercedes-Benz recommends that youonly use wheel bolts which have been approvedfor Mercedes-Benz vehicles and the respectivewheel.
!To prevent damage to the paintwork, holdthe wheel securely against the wheel hubwhile screwing in the first wheel bolt.
XClean the wheel and wheel hub contact sur-faces.
XPlace the new wheel on the wheel hub andpush it on.
XTighten the wheel bolts until they are finger-tight.
Lowering the vehicle
GWARNING
The wheels could work loose if the wheel nuts
and bolts are not tightened to the specified
tightening torque. There is a risk of accident.
Have the tightening torque immediately
checked at a qualified specialist workshop
after a wheel is changed.
XPlace the ratchet wrench onto the hexagonnut of the jack so that the lettersABare visi-ble.
XTurn the ratchet wrench until the vehicle isonce again standing firmly on the ground.
XPlace the jack to one side.
XTighten the wheel bolts evenly in a crosswisepattern in the sequence indicated (Cto

Wheel and tire combinations
General notes
You can ask for information regarding permittedwheel/tire combinations at an authorizedMercedes-Benz Center.
You should regularly check the pressure of theemergency spare wheel, particularly prior tolong trips, and correct the pressure as neces-sary (Ypage 293). The value on the wheel isvalid.
!For safety reasons, Mercedes-Benz recom-mends that you only use tires and wheelswhich have been approved by Mercedes-Benzspecifically for your vehicle.
These tires have been specially adapted foruse with the control systems, such as ABS or
ESP®, and are marked as follows:
RMO = Mercedes-Benz Original
RMOE = Mercedes-Benz Original Extended(tires featuring run-flat characteristics)
RMO1 = Mercedes-Benz Original (only cer-tain AMG tires)
Mercedes-Benz Original Extended tires mayonly be used on wheels that have been spe-cifically approved by Mercedes-Benz.
Only use tires, wheels or accessories testedand approved by Mercedes-Benz. Certaincharacteristics, e.g. handling, vehicle noiseemissions or fuel consumption, may other-wise be adversely affected. In addition, whendriving with a load, tire dimension variationscould cause the tires to come into contactwith the bodywork and axle components. Thiscould result in damage to the tires or the vehi-cle.
Mercedes-Benz accepts no liability for dam-age resulting from the use of tires, wheels oraccessories other than those tested andapproved.
Information on tires, wheels and approvedcombinations can be obtained from any quali-fied specialist workshop.
!Retreaded tires are neither tested nor rec-ommended by Mercedes-Benz, since previ-ous damage cannot always be detected onretreaded tires. As a result, Mercedes-Benzcannot guarantee vehicle safety if retreadedtires are mounted. Do not mount used tires ifyou have no information about their previoususage.
The recommended pressures for various oper-ating conditions can be found:
Ron the Tire and Loading Information placardon the B-pillar on the driver's side
Rin the tire pressure table in the fuel filler flap
Observe the notes on recommended tire pres-sures under various operating conditions(Ypage 293).
Check tire pressures regularly, and only whenthe tires are cold. Comply with the maintenancerecommendations of the tire manufacturer inthe vehicle document wallet.
Notes on the vehicle equipment – always equipthe vehicle:
Rwith tires of the same size on a given axle (leftand right)
Rwith the same type of tire (summer tires,MOExtended tires, winter tires)
Exception: it is permissible to install a differ-ent type or make in the event of a flat tire.Observe the "MOExtended tires (tires withrun-flat characteristics" section (Ypage 275).
Vehicles equipped with MOExtended tires arenot equipped with a TIREFIT kit at the factory. Itis therefore recommended that you additionallyequip your vehicle with a TIREFIT kit if you mounttires that do not feature run-flat properties, e.g.winter tires. A TIREFIT kit may be obtained froma qualified specialist workshop.
Emergency spare wheel
Important safety notes
GWARNING
The wheel or tire size as well as the tire type of
the spare wheel or emergency spare wheel
and the wheel to be replaced may differ.
Mounting an emergency spare wheel may
severely impair the driving characteristics.
There is a risk of an accident.
To avoid hazardous situations:
Radapt your driving style accordingly and
drive carefully.
Rnever mount more than one spare wheel or
emergency spare wheel that differs in size.
Ronly use a spare wheel or emergency spare
wheel of a different size briefly.
Emergency spare wheel315
Wheels and tires
Z

Rdo not switch ESP®off.
Rhave a spare wheel or emergency spare
wheel of a different size replaced at the
nearest qualified specialist workshop.
Observe that the wheel and tire dimensions
as well as the tire type must be correct.
When using an emergency spare wheel or sparewheel of a different size, you must not exceedthe vehicle's maximum design speed of 50 mph(80 km/h).
You should regularly check the pressure of theemergency spare wheel, particularly prior tolong trips, and correct the pressure as neces-sary (Ypage 293). The value on the wheel isvalid.
Snow chains must not be mounted on emer-gency spare wheels.
General notes
You can ask for information regarding permittedemergency spare wheels at an authorizedMercedes-Benz Center.
An emergency spare wheel may also be moun-ted against the direction of rotation. Observethe time restriction on use as well as the speedlimitation specified on the emergency sparewheel.
Replace the tires after six years at the latest,regardless of wear. This also applies to theemergency spare wheel.
Tire pressure loss warning system (Canadaonly):as long as you are driving with the emer-gency spare wheel mounted, the tire pressureloss warning system cannot function reliably.Only restart the tire pressure loss warning sys-tem when the defective wheel has beenreplaced with a new wheel.
Vehicles with tire pressure monitor (USAonly):after an emergency spare wheel has beenmounted, the system may still display the tirepressure of the removed wheel for a fewminutes. The value displayed for the mountedemergency spare wheel is not the same as thecurrent tire pressure of the emergency sparewheel.
Removing the emergency spare wheel
Vehicles with the "Minispare" emergency sparewheel
The "Minispare" emergency spare wheel issecured in emergency spare wheel bagCin thetrunk.
XOpen the trunk lid
XRelease securing strapsDon emergencyspare wheel bagC.
XRemove emergency spare wheel bagCwiththe "Minispare" emergency spare wheel.
XOpen emergency spare wheel bagCandremove the "Minispare" emergency sparewheel.
Observe the instructions and safety notes in the"Changing a wheel" section (Ypage 311).
316Emergency spare wheel
Wheels and tires

Information regarding technical data
iThe data stated here specifically refers to avehicle with standard equipment. Consult anauthorized Mercedes-Benz Center for thedata for all vehicle variants and trim levels.
Vehicle electronics
Installing two-way radios and mobile
phones (RF transmitters)
GWARNING
The electromagnetic radiation from two-way
radios can interfere with the vehicle electron-
ics if two-way radios are manipulated or ret-
rofitted incorrectly. This could jeopardize the
operating safety of the vehicle. There is a risk
of an accident.
You should have all work on electrical and
electronic components carried out at a quali-
fied specialist workshop.
GWARNING
If you incorrectly operate two-way radios in
the vehicle, the electromagnetic radiation
may interfere with the vehicle electronics, for
example if:
Rthe two-way radio is not connected to an
exterior antenna
Rthe exterior antenna is not correctly moun-
ted or is not low-reflection
This could jeopardize the operating safety of
the vehicle. There is a risk of an accident.
Have the low-reflection exterior antenna
installed at a qualified specialist workshop.
Always connect two-way radios to the low-
reflection exterior antenna when operating in
the vehicle.
!The operating permit may be invalidated ifthe instructions for installation and use oftwo-way radios are not observed.
In particular, the following conditions must becomplied with:
Ronly approved wavebands may be used
Robserve the maximum permissible outputin these wavebands
Ronly approved antenna positions may beused
Excessive levels of electromagnetic radiationmay cause damage to your health and the healthof others. Using an exterior antenna takes intoaccount current scientific discussions relatingto the possible health hazards that may resultfrom electromagnetic fields.
Approved antenna positions
CFront roof area
DRear roof area

The maximum transmission output (PEAK) at thebase of the antenna must not exceed the fol-lowing values:
Frequency bandMaximumtransmissionoutput
Short wave
3 - 54 MHz
100 W
4 m waveband
74 - 88 MHz
30 W
2 m waveband
144 - 174 MHz
50 W
Trunked radio system/Tetra
380 - 460 MHz
10 W
70 cm waveband
400 - 460 MHz
35 W
Mobile communications(2G/3G/4G)10 W
The following can be used in the vehicle withoutrestrictions:
RRF transmitters with a maximum transmis-sion output of up to 100 mW
RRF transmitters with transmitter frequenciesin the 380 - 410 MHz frequency band and amaximum transmission output of up to 2 W(trunked radio system/Tetra)
RMobile phones (2G/3G/4G)
There is no restriction for antenna positions onthe outside of the vehicle for the following fre-quency bands:
RTrunked radio system/Tetra
R70 cm waveband
R2G/3G/4G
Identification plates
Vehicle identification plate with vehi-
cle identification number (VIN)
XOpen the driver's door.You will see vehicle identification plateC.
Example: vehicle identification plate (USA only)
CVIN
DPaint code
Example: vehicle identification plate (Canada only)
CVIN
DPaint code
iThe data shown on the vehicle identificationplate is used only as an example. This data is
318Identification plates
Technical data