2019 MERCEDES-BENZ CLA Owners Manual

1500 lbs (680 kg).This is for illustration purposes only.Make sure you are using the actual loadlimit for your vehicle stated on your vehicle's Tire and Loading Information placard (Ypage 301).
The greater the combined weight of the occupants, the lower the maximum luggage load.
Step 1
Example 1Example 2Example 3
Combined maximumweight of occupantsand cargo (data fromthe Tire and LoadingInformation placard)
1500 lbs (680 kg)1500 lbs (680 kg)1500 lbs (680 kg)
Step 2
Example 1Example 2Example 3
Number of people inthe vehicle (driver andoccupants)
531
Distribution of theoccupantsFront: 2
Rear: 3
Front: 1
Rear: 2
Front: 1
Weight of the occu-pantsOccupant 1: 150 lbs(68 kg)
Occupant 2: 180 lbs(82 kg)
Occupant 3: 160 lbs(73 kg)
Occupant 4: 140 lbs(63 kg)
Occupant 5: 120 lbs(54 kg)
Occupant 1: 200 lbs(91 kg)
Occupant 2: 190 lbs(86 kg)
Occupant 3: 150 lbs(68 kg)
Occupant 1: 150 lbs(68 kg)
Gross weight of alloccupants750 lbs (340 kg)540 lbs (245 kg)150 lbs (68 kg)
Step 3
Example 1Example 2Example 3
Permissible load (maxi-mum gross vehicleweight rating from theTire and Loading Infor-mation placard minusthe gross weight of alloccupants)
1500 lbs (680 kg)

Permissible Gross Vehicle Weight Rating(GVWR):the gross weight of the vehicle, all pas-sengers, load and trailer load/noseweight (ifapplicable) must not exceed the permissiblegross vehicle weight.
Gross Axle Weight Rating (GAWR):the maxi-mum permissible weight that can be carried byone axle (front or rear axle).
To ensure that your vehicle does not exceed themaximum permissible values (gross vehicleweight and maximum gross axle weight rating),have your loaded vehicle (including driver, occu-pants, cargo, and full trailer load if applicable)weighed on a suitable vehicle weighbridge.
All about wheels and tires
Uniform Tire Quality Grading Stand-
ards
Overview of Tire Quality Grading Stand-
ards
Uniform Tire Quality Grading Standards are U.S.government specifications. Their purpose is toprovide drivers with uniform reliable informationon tire performance data. Tire manufacturershave to grade tires using three performance fac-tors:Ctread wear grade,Dtraction grade and

Observe the legally required minimum tire treaddepth (Ypage 291). Winter tires can reduce thebraking distance on snow-covered surfaces incomparison with summer tires. The braking dis-tance is still much further than on surfaces thatare not icy or covered with snow. Take appro-priate care when driving.
Further information on winter tires (M+S tires)(Ypage 292).
Temperature
GWARNING
The temperature grade for this tire is estab-
lished for a tire that is properly inflated and
not overloaded. Excessive speed, underinfla-
tion, or excessive loading, either separately or
in combination, can cause excessive heat
build-up and possible tire failure.
The temperature grades are A (the highest), B,and C, representing the tire's resistance to thegeneration of heat and its ability to dissipateheat when tested under controlled conditionson a specified indoor laboratory test wheel. Sus-tained high temperature can cause the materialof the tire to degenerate and reduce tire life, andexcessive temperature can lead to sudden tirefailure. The grade C corresponds to a level ofperformance which all passenger car tires mustmeet under the Federal Motor Vehicle SafetyStandard No. 109. Grades B and A representhigher levels of performance on the laboratorytest wheel than the minimum required by law.
Tire labeling
Overview
CUniform Tire Quality Grading Standards(Ypage 309)
DDepartment of Transportation, Tire Identifi-cation Number (Ypage 308)

tire load rating and speed rating required for
your vehicle.
CTire width
DNominal aspect ratio in %

the size description, depending on the man-ufacturer (e.g. 245/40 ZR18).
The service specification is made up of load-bearing index

Maximum tire loadCis the maximum permis-sible weight for which the tire is approved.
Do not overload the tires by exceeding thespecified load limit. The maximum permissibleload can be found on the vehicle's Tire andLoading Information placard on the B-pillar onthe driver's side (Ypage 301).
iThe actual values for tires are vehicle-spe-cific and may deviate from the values in theillustration.
DOT, Tire Identification Number (TIN)
US tire regulations stipulate that every tire man-ufacturer or retreader must imprint a TIN in or onthe sidewall of each tire produced.
The TIN is a unique identification number. TheTIN enables the tire manufacturers or retreadersto inform purchasers of recalls and other safety-relevant matters. It makes it possible for thepurchaser to easily identify the affected tires.
The TIN is made up of manufacturer identifica-tion codeD, tire size

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