MERCEDES-BENZ GLC 2019 Owners Manual

too low. The tire pressure monitor is not mal-functioning.
Rif the warning lamp flashes for around aminute and then remains lit constantly, thetire pressure monitor is malfunctioning.
In addition to the warning lamp, a messageappears in the multifunction display. Observethe information on display messages(Ypage 250).
It may take up to ten minutes for a malfunctionof the tire pressure monitor to be indicated. Amalfunction will be indicated by the tire pres-sure warning lamp flashing for approximatelyone minute and then remaining lit. When themalfunction has been rectified, the tire pressurewarning lamp goes out after a few minutes ofdriving.
The tire pressure values indicated by the on-board computer may differ from those meas-ured at a gas station with a pressure gauge. Thetire pressures shown by the on-board computerrefer to those measured at sea level. At highaltitudes, the tire pressure values indicated by apressure gauge are higher than those shown bythe on-board computer. In this case, do notreduce the tire pressures.
The operation of the tire pressure monitor canbe affected by interference from radio transmit-ting equipment (e.g. radio headphones, two-wayradios) that may be being operated in or near thevehicle.
Checking the tire pressure electroni-
cally
XMake sure that the SmartKey is in positionH(Ypage 131) in the ignition lock.
XPress

the Tire and Loading Information placard onthe B-pillar on the driver's side.
You can find more tire pressures for variousoperating conditions in the tire pressure tableinside the filler flap.
Observe the information on tire pressurewhen doing so (Ypage 333).
XMake sure that the tire pressure is correct onall four wheels.
XMake sure that the SmartKey is in positionHin the ignition lock (Ypage 131).
XPress

CB-pillar, driver's side
Maximum permissible gross vehicle
weight rating
XSpecification for maximum gross vehicleweightCis listed in the Tire and LoadingInformation placard: "The combined weight ofoccupants and cargo should never exceedXXX kg or XXX lbs."
The gross weight of all vehicle occupants, loadand luggage must not exceed the specifiedvalue.
iThe specifications shown on the Tire andLoading Information placard in the illustrationare examples. The maximum permissiblegross vehicle weight rating is vehicle-specificand may differ from that in the illustration.You can find the valid maximum permissiblegross vehicle weight rating for your vehicle onthe Tire and Loading Information placard.
Number of seats
Maximum number of seatsCindicates themaximum number of occupants allowed totravel in the vehicle. This information can befound on the Tire and Loading Information plac-ard.
iThe specifications shown on the Tire andLoading Information placard in the illustrationare examples. The number of seats is vehicle-specific and can differ from the details shown.The number of seats in your vehicle can befound on the Tire and Loading Informationplacard.
Determining the correct load limit
Step-by-step instructions
The following steps have been developed asrequired of all manufacturers under Title 49,Code of U.S. Federal Regulations, Part 575 pur-suant to the "National Traffic and Motor VehicleSafety Act of 1966".
XStep 1:Locate the statement "The combinedweight of occupants and cargo should neverexceed XXX kg or XXX lbs." on your vehicle'sTire and Loading Information placard.
XStep 2:Determine the combined weight ofthe driver and passengers that will be riding inyour vehicle.
XStep 3:Subtract the combined weight of thedriver and passengers from XXX kilograms orXXX lbs.
XStep 4:The resulting figure equals the avail-able amount of cargo and luggage load capa-city. For example, if the "XXX" amount equals1400 lbs andthere will be five 150-lb pas-sengers in your vehicle, the amount of avail-
Loading the vehicle341
Wheels and tires
Z

able cargo and luggage load capacity is650 lbs (1400 - 750 (5 x 150) = 650 lbs).
XStep 5:Determine the combined weight ofluggage and cargo being loaded on the vehi-
cle. That weight may not safely exceed theavailable cargo and luggage load capacity cal-culated in step 4.
Example: steps 1 to 3
The following table shows examples on how to calculate total and cargo load capacities with varyingseating configurations and number and size of occupants. The following examples use a load limit of1500 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 340).
The greater the combined weight of the occupants, the lower the maximum luggage load.
Step 1
Example 1Example 2Example 3
Combined maximumweight of occupantsand load (data from theTire and Loading Infor-mation 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)
342Loading the vehicle
Wheels and tires

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)

iThe actual values for tires are vehicle-spe-cific and may deviate from the values in theillustration.
Treadwear
The treadwear grade is a comparative ratingbased on the wear rate of the tire when testedunder controlled conditions on a specified U.S.government course. For example, a tire graded150 would wear one and one-half times as wellon the government course as a tire graded 100.
The relative performance of tires depends uponthe actual conditions of their use, however, andmay depart significantly from the norm due tovariations in driving habits, service practicesand differences in road characteristics and cli-mate.
Traction
GWARNING
The traction grade assigned to this tire is
based on straight-ahead braking traction
tests, and does not include acceleration, cor-
nering, hydroplaning, or peak traction char-
acteristics.
!Avoid wheelspin. This can lead to damage tothe drive train.
The traction grades – from highest to lowest –are AA, A, B and C. Those grades represent thetire's ability to stop on wet pavement as meas-ured under controlled conditions on specifiedgovernment test surfaces of asphalt and con-crete. A tire marked C may have poor tractionperformance.
The safe speed on a wet, snow covered or icyroad is always lower than on dry road surfaces.
You should pay special attention to road condi-tions when temperatures are around freezingpoint.
Mercedes-Benz recommends a minimum treaddepth of

Tire labeling
Overview
CUniform Tire Quality Grading Standard(Ypage 348)
DDOT, Tire Identification Number(Ypage 347)

"ZR" in the size description, depending on themanufacturer (e.g. 245/40 ZR 18).
Rim diameter:rim diameter

The speed rating of tires mounted at the factorymay be higher than the maximum permissiblespeed permitted by the electronic speed limiter.
Make sure that your tires have the requiredspeed rating, e.g. when buying new tires. Youcan find information on this under "Tires"(Ypage 354).
Further information about reading tire data canbe obtained from any qualified specialist work-shop.
Load index
In addition to the load-bearing index, loadindexCmay also be imprinted on the sidewallof the tire. You will find this after the letter thatidentifies the speed rating (Ypage 345).
RIf no specification is given: no text (as in theexample above), represents a standard load(SL) tire
RXL or Extra Load: represents a reinforced tire
RLight Load: represents a light load tire
RC, D, E: represents a load range that dependson the maximum load that the tire can carry ata certain pressure
iTire data is vehicle-specific and may deviatefrom the data in the example.
Maximum load rating
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 340).
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

requirements of the U.S. Department of Trans-portation.
Manufacturer identification code:manufac-turer identification codeDprovides details onthe tire manufacturer. New tires have a codewith two symbols. Retreaded tires have a codewith four symbols.
For further information about retreaded tires,see (Ypage 354).
Tire size:identifier