winter tires MERCEDES-BENZ GLE 2019 Owners Manual

Stowage and features
......................295
Stowage areas .....................................2 95
Features .............................................. 304 Maintenance and care
......................321
Engine compartment ........................... 321
ASSYST PLUS ...................................... 325
Care ..................................................... 326 Breakdown assistance
.....................334
Where will I find...? .............................. 334
Flat tire ................................................ 335
Battery (vehicle) .................................. 340
Jump-starting ....................................... 343
Towing and tow-starting ..................... .345
Fuses ................................................... 349 Wheels and tires
............................... 351
Important safety notes ........................ 351
Operation ............................................ 351
Winter operation .................................. 353
Tire pressure ....................................... 354
Loading the vehicle .............................. 361
All about wheels and tires ................... 364
Changing a wheel ................................ 371
Wheel and tire combinations .............. .376
Emergency spare wheel ....................... 376 Technical data
................................... 381
Information regarding technical data ... 381
Vehicle electronics .............................. 381
Identification plates ............................ .382
Service products and filling capaci-
ties ...................................................... 383
Vehicle data ......................................... 390
Vehicle data for off-road driving .......... 392
Trailer tow hitch ................................... 394 Contents
3

Stowage net
....................................... 297
Summer tires
In winter ........................................3 53
Sun visor ............................................ 305
Suspension setting
AIRMATIC ...................................... 183
AMG adaptive sport suspension
system .......................................... .187
Suspension tuning
SETUP (on-board computer,
Mercedes-AMG vehicles) .............. .242
SUV
(Sport Utility Vehicle) ....................... 30
Switching air-recirculation mode
on/off ................................................. 131
Switching on media mode
Via the device lis t.......................... 293 T
Tachometer ........................................ 229
Tailgate
Display message ............................ 271
Emergency unlocking ....................... 88
Important safety notes .................... 84
Limiting the opening angle ............... 88
Opening dimensions ...................... 390
Opening/closing (automatically
from inside) ...................................... 87
Opening/closing (automatically
from outside) ................................... 86
Opening/closing (from outside) ....... 85
Power closing .................................. 84
Tank
see Fuel tank
Tank content
Fuel gauge ....................................... 37
Technical data
Capacities ...................................... 383
Information .................................... 381
Tires/wheels ................................. 376
Trailer loads ................................... 394
Vehicle data ................................... 390
Telephone
Accepting a call (multifunction
steering wheel) .............................. 236
Authorizing a mobile phone (con-
necting) ......................................... 291 Authorizing a mobile phone via the
device manager (connecting) ......... 292
Connecting a mobile phone
(device manager) ........................... 292
Connecting a mobile phone (gen-
eral information) ............................ 291
Display message ............................ 272
Menu (on-board computer) ............ 236
Number from the phone book ........ 236
Redialing ........................................ 236
Rejecting/ending a call ................. 236
see also Digital Operator's Man-
ual .................................................. 287
Temperature
Coolant (display in the instrumentcluster) .......................................... 230
Coolant (on-board computer,
Mercedes-AMG vehicles) ............... 241
Engine oil (on-board computer,
Mercedes-AMG vehicles) ............... 241
Outside temperature ...................... 229
Setting (climate control )................ 128
Transmission oil (on-board com-
puter, Mercedes-AMG vehicles) ..... 241
Through-loading feature ................... 298
Timing (RACETIMER) ......................... 242
Tire pressure
Calling up (on-board computer) ..... 358
Checking manually ........................ 357
Display message ............................ 268
Maximum ....................................... 357
Not reached (TIREFIT) .................... 339
Notes ............................................. 356
Reached (TIREFIT) .......................... 339
Recommended ............................... 354
Tire pressure loss warning system
General notes ................................ 357
Important safety notes .................. 358
Restarting ...................................... 358
Tire pressure monitor
Checking the tire pressure elec-
tronically ........................................ 360
Function/note s............................. 358
General notes ................................ 358
Important safety notes .................. 359
Radio type approval for the tire
pressure monitor ........................... 361
Restarting ...................................... 361 Index
21

Warning lamp ................................. 286
Warning message .......................... 360
Tire pressure table ............................355
TIREFIT kit
Important safety notes .................. 337
Storage location ............................ 335
Tire pressure not reached .............. 339
Tire pressure reached .................... 339
Using ............................................. 338
Tires
Aspect ratio (definition) ................. 370
Average weight of the vehicle
occupants (definition) .................... 369
Bar (definition) ............................... 369
Changing a wheel .......................... 371
Characteristics .............................. 369
Checking ........................................ 351
Curb weight (definition) ................. 370
Definition of terms ......................... 369
Direction of rotatio n...................... 372
Display message ............................ 268
Distribution of the vehicle occu-
pants (definition) ............................ 371
DOT (Department of Transporta-
tion) (definition) ............................. 369
DOT, Tire Identification Number
(TIN) ............................................... 368
GAWR (Gross Axle Weight Rating)
(definition) ..................................... 369
GTW (Gross Trailer Weight) (defi-
nition) ............................................ 370
GVW (Gross Vehicle Weight) (def-
inition) ........................................... 370
GVWR (Gross Vehicle Weight Rat-
ing) (definition) .............................. 370
Important safety notes .................. 351
Increased vehicle weight due to
optional equipment (definition) ...... 369
Information on driving .................... 351
Kilopascal (kPa) (definition) ........... 370
Labeling (overview) ........................ 366
Load bearing index (definition) ...... 371
Load index ..................................... 368
Load index (definition) ................... 370
M+S tire s....................................... 353
Maximum load on a tire (defini-
tion) ............................................... 370 Maximum loaded vehicle weight
(definition) ..................................... 370
Maximum permissible tire pres-
sure (definition) ............................. 370
Maximum tire load ......................... 368
Maximum tire load (definition) ....... 370
MOExtended tire s.......................... 353
Optional equipment weight (defi-
nition) ............................................ 371
PSI (pounds per square inch) (def-
inition) ........................................... 370
Replacing ....................................... 371
Service life ..................................... 352
Sidewall (definition) ....................... 371
Snow chains .................................. 353
Speed rating (definition) ................ 370
Storing ........................................... 372
Structure and characteristics
(definition) ..................................... 369
Summer tires in winter .................. 353
Temperature .................................. 365
TIN (Tire Identification Number)
(definition) ..................................... 371
Tire bead (definition) ...................... 370
Tire pressure (definition) ................ 370
Tire pressures (recommended) ...... 369
Tire size (data) ............................... 376
Tire size designation, load-bearing capacity, speed rating .................... 366
Tire tread ....................................... 352
Tire tread (definition) ..................... 370
Total load limit (definition) ............. 371
Traction ......................................... 365
Traction (definition) ....................... 371
Tread wear ..................................... 365
TWR (permissible trailer drawbar
noseweight) (definition) ................. 371
Uniform Tire Quality Grading
Standards ...................................... 364
Uniform Tire Quality Grading
Standards (definition) .................... 369
Wear indicator (definition) ............. 371
Wheel and tire combination ........... 376
Wheel rim (definition) .................... 369
see Flat tire
Top Tether ............................................ 62
Tow-starting
Emergency engine starting ............ 349 22
Index

Windows
see Side windows
Windshield
Defrosting ...................................... 129
Infrared reflective .......................... 320
Windshield washer fluid
see Windshield washer system
Windshield washer system
Adding washer flui d....................... 325
Important safety notes .................. 389
Windshield wipers
Problem (malfunction) ................... 121
Rear window wipe r........................ 118
Replacing the wiper blades ............ 118
Replacing the wiper blades
(MAGIC VISION CONTROL) ............ 119
Switching on/of f........................... 117
Winter driving
Slippery road surfaces ................... 164
Winter operation
Overview ........................................ 353
Radiator cover ............................... 322
Winter tires
M+S tire s....................................... 353
Wiper blades
Cleaning ......................................... 330
Replacing ....................................... 118
Replacing (rear window )................ 120
Replacing (windshield) ................... 118
Wooden trim (cleaning instruc-
tions) .................................................. 332
Workshop
see Qualified specialist workshop Z
ZONE function Switching on/of f........................... 129 Index
25

Driving safety systems
Overview of driving safety systems
In this section, you will find information about
the following driving safety systems:
R ABS (Anti-lock BrakingSystem)
(Y page 66)
R BAS (Brake AssistSystem) (Y page 67)
R Active Brake Assist (Y page 67)
R ESP ®
(E lectronic StabilityProgram)
(Y page 70)
R EBD (Electronic Brake forceDistribution)
(Y page 72)
R ADAPTIVE BRAKE (Y page 72)
R Active Brake Assist with cross-traffic function
(Y page 72)
R Active Steering Assist STEER CONTROL
(Y page 75) Important safety notes
If you fail to adapt your driving style or if you are
inattentive, the driving safety systems can nei-
ther reduce the risk of an accident nor override the laws of physics. Driving safety systems are
merely aids designed to assist driving. You are
responsible for maintaining the distance to the
vehicle in front, for vehicle speed, for braking in
good time, and for staying in lane. Always adapt your driving style to suit the prevailing road and
weather conditions and maintain a safe distance from the vehicle in front. Drive carefully.
The driving safety systems described only work
as effectively as possible when there is ade-
quate contact between the tires and the road
surface. Pay particular attention to the informa- tion regarding tires, recommended minimum
tire tread depths etc. in the "Wheels and tires"
section (Y page 351).
In wintry driving conditions, always use winter
tires (M+S tires )and if necessary, snow chains.
Only in this way will the driving safety systems
described in this section work as effectively as
possible. ABS (Anti-lock Braking System)
General information ABS regulates brake pressure in such a way that
the wheels do not lock when you brake. This
allows you to continue steering the vehicle when braking.
The 0025 ABS warning lamp in the instrument
cluster lights up when the ignition is switched
on. It goes out when the engine is running.
ABS works from a speed of about 5 mph
(8 km/h), regardless of road-surface conditions.
ABS works on slippery surfaces, even when you only brake gently.
Important safety notes i
Observe the "Important safety notes" sec-
tion (Y page 66). G
WARNING
If ABS is faulty, the wheels could lock when
braking. The steerability and braking charac-
teristics may be severely impaired. Addition-
ally, further driving safety systems are deac-
tivated. There is an increased danger of skid- ding and accidents.
Drive on carefully. Have ABS checked imme-
diately at a qualified specialist workshop.
When ABS is malfunctioning, other systems,
including driving safety systems, will also
become inoperative. Observe the information
on the ABS warning lamp (Y page 277) and dis-
play messages which may be shown in the
instrument cluster (Y page 245).
Brakes X
If ABS intervenes: continue to depress the
brake pedal vigorously until the braking sit-
uation is over.
X To make a full brake application: depress
the brake pedal with full force.
If ABS intervenes when braking, you will feel a
pulsing in the brake pedal.
The pulsating brake pedal can be an indication
of hazardous road conditions, and functions as a
reminder to take extra care while driving. 66
Driving safety systemsSafety

R
you switch on the turn signals. In this event,
the warnings are suppressed for a certain
period of time.
R a driving safety system intervenes, such as
ABS, BAS or ESP ®
.
When Adaptive
Adaptive is selected, no warning vibra-
tion occurs if:
R you switch on the turn signals. In this event,
the warnings are suppressed for a certain
period of time.
R a driving safety system intervenes, e.g.
ABS, BAS or ESP ®
.
R you accelerate hard, e.g. kickdown.
R you brake hard.
R you steer actively, e.g. swerve to avoid an
obstacle or change lanes quickly.
R you cut the corner on a sharp bend.
Towing a trailer
When you attach a trailer, make sure you have
correctly established the electrical connection.
This can be accomplished by checking the trailer
lighting. Lane-correcting brake application does not take place when towing a trailer. Active Lane
Keeping Assist is not activated and the lines in
the assistance graphic are gray. Off-road driving systems
4MATIC (permanent four-wheel drive) 4MATIC ensures that all four wheels are perma-
nently driven. Together with ESP ®
and 4ETS, it
improves the traction of your vehicle whenever
a drive wheel spins due to insufficient grip.
If you fail to adapt your driving style, 4MATIC can
neither reduce the risk of accident nor override
the laws of physics. 4MATIC cannot take
account of road, weather and traffic conditions. 4MATIC is only an aid. You are responsible for
the distance to the vehicle in front, for vehicle
speed, for braking in good time and for staying in
your lane.
! Never tow the vehicle with one axle raised.
This may damage the transfer case. Damage
of this sort is not covered by the Mercedes-
Benz Limited Warranty. All wheels must
remain either on the ground or be fully raised. Observe the instructions for towing the vehi-
cle with all wheels in full contact with the
ground. !
A function or performance test should only
be carried out on a two-axle dynamometer.
Before you operate the vehicle on such a
dynamometer, please consult a qualified
workshop. You could otherwise damage the
drive train or the brake system.
i In wintry driving conditions, the maximum
effect of 4MATIC can only be achieved if you
use winter tires (M+S tires), with snow chains
if necessary.
Further information about "Driving off-road"
(Y page 165).
DSR (Downhill Speed Regulation) General notes
DSR is an aid to assist you when driving down-
hill. It keeps the speed of travel at the speed
selected on the on-board computer. The steeper
the downhill gradient, the greater the DSR brak- ing effect on the vehicle. When driving on flat
stretches of road or on an uphill gradient, the
DSR braking effect is minimal or nonexistent.
DSR controls the vehicle’s speed when it is acti-
vated and the transmission is in position 005B,005E
or 005C. You can drive at a higher or a lower speed
than that set on the on-board computer at any
time by accelerating or braking.
Important safety notes G
WARNING
If the speed driven and the set speed deviate and you activate DSR on a slippery road sur-
face, the wheels may lose traction. There is an
increased danger of skidding and accidents.
Before switching DSR on, please take into
consideration the road surface and the differ- ence between driving speed and the set
speed.
If you fail to adapt your driving style, DSR can
neither reduce the risk of accident nor override the laws of physics. DSR cannot take account of
road, weather and traffic conditions. DSR is only
an aid. You are responsible for the distance to
the vehicle in front, for vehicle speed, for brak-
ing in good time and for staying in your lane.
You are always responsible for keeping control
of the vehicle and for assessing whether the
downhill gradient can be managed. DSR may not always be able to keep to the set speed, depend- 214
Driving systemsDriving an
d parking

To avoid damage to the vehicle, deactivate
Active Distance Assist DISTRONIC and the
HOLD function in the following or similar sit-
uations:
R when towing the vehicle
R in the car wash
! Never clean your vehicle in a Touchless
Automatic Car Wash as these use special
cleaning agents. These cleaning agents can
damage the paintwork or plastic parts.
! Make sure that:
R the side windows and the sliding sunroof
are fully closed.
R that the blower of the ventilation/heating
system is switched off (OFF button has
been pressed).
R the windshield wiper switch is at position
005A.
The vehicle may otherwise be damaged.
! In car washes with a towing mechanism,
make sure that the automatic transmission is
in transmission position 005C; otherwise, the
vehicle could be damaged.
R Vehicles with a SmartKey:
Do not remove the SmartKey from the igni-
tion lock. Do not open the driver's door or
front-passenger door when the engine is
switched off. Otherwise, the automatic
transmission selects park position 005Dauto-
matically and locks the wheels. You can
prevent this by shifting the automatic trans- mission to 005Cbeforehand.
R Vehicles with KEYLESS-GO:
Do not open the driver's door or front-
passenger door when the engine is
switched off. Otherwise, the automatic
transmission selects park position 005Dauto-
matically and locks the wheels.
Observe the following to make sure that the
automatic transmission stays in position 005C:
X Make sure the vehicle is stationary and the
ignition is switched off.
X Turn the SmartKey to position in the ignition
lock 0048(Ypage 135).
Use the SmartKey instead of the Start/Stop
button on vehicles with KEYLESS-GO.
X Depress and hold the brake pedal.
X Shift the automatic transmission to position
005C. X
Release the brake pedal.
X Release the electric parking brake.
X Switch off the ignition and leave the SmartKey
in the ignition lock.
You can wash the vehicle in an automatic car
wash from the very start.
If the vehicle is very dirty, pre-wash it before
cleaning it in an automatic car wash.
After using an automatic car wash, wipe off wax
from the windshield and the wiper blades. This
will prevent smears and reduce wiping noises
caused by residue on the windshield.
Washing by hand In some countries, washing by hand is only
allowed at specially equipped washing bays.
Observe the legal requirements in all countries
concerned.
X Do not use hot water and do not wash the
vehicle in direct sunlight.
X Use a soft sponge to clean.
X Use a mild cleaning agent, such as a car
shampoo approved by Mercedes-Benz.
X Thoroughly hose down the vehicle with a gen-
tle jet of water.
X Do not point the water jet directly towards the
air inlets.
X Use plenty of water and rinse out the sponge
frequently.
X Rinse the vehicle with clean water and dry
thoroughly with a chamois.
X Do not let the cleaning agent dry on the paint-
work.
When using the vehicle in winter, remove all
traces of road salt deposits carefully and as
soon as possible.
Power washers G
WARNING
The water jet from a circular jet nozzle (dirt
blasters) can cause invisible exterior damage to the tires or chassis components. Compo-
nents damaged in this way may fail unexpect-edly. There is a risk of an accident.
Do not use power washers with circular jet
nozzles to clean the vehicle. Have damaged Care
327Maintenance and care
Z

be used as a temporary measure. Make sure
that you use the proper size and type (sum-
mer or winter tire).
i Vehicles equipped with MOExtended tires
are not equipped with a TIREFIT kit at the fac- tory. It is therefore recommended that you
additionally equip your vehicle with a TIREFIT
kit if you mount tires that do not feature run- flat properties, e.g. winter tires. A TIREFIT kit
may be obtained from a qualified specialist
workshop.
Important safety notes G
WARNING
When driving in emergency mode, the driving characteristics deteriorate, e.g. when corner-
ing, accelerating quickly and when braking.
There is a risk of an accident.
Do not exceed the stated maximum speed.
Avoid abrupt steering and driving maneuvers,
and driving over obstacles (curbs, potholes,
off-road). This applies in particular to a laden
vehicle.
Stop driving in emergency mode if:
R you hear banging noises.
R the vehicle starts to shake.
R you see smoke and smell rubber.
R ESP ®
is intervening constantly.
R there are tears in the sidewalls of the tire.
After driving in emergency mode, have the
wheel rims checked at a qualified specialist
workshop with regard to their further use. The defective tire must be replaced in every case. TIREFIT kit
Important safety notes TIREFIT is a tire sealant.
You can use TIREFIT to seal punctures of up to
0.16 in (4 mm), particularly those in the tire
tread. You can use TIREFIT at outside tempera-
tures down to 00F84 ‡ (00F820 †). G
WARNING
In the following situations, the tire sealant is
unable to provide sufficient breakdown assis- tance, as it is unable to seal the tire properly:
R there are cuts or punctures in the tire larger
than those mentioned above.
R the wheel rim is damaged.
R you have driven at very low tire pressures or
on a flat tire.
There is a risk of an accident.
Do not drive the vehicle. Contact a qualified
specialist workshop. G
WARNING
The tire sealant is harmful and causes irrita-
tion. It must not come into contact with your
skin, eyes or clothing or be swallowed. Do not inhale TIREFIT fumes. Keep tire sealant away
from children. There is a risk of injury.
If you come into contact with the tire sealant,
observe the following:
R Rinse off the tire sealant from your skin
immediately with water.
R If the tire sealant comes into contact with
your eyes, immediately rinse them thor-
oughly with clean water.
R If tire sealant is swallowed, immediately
rinse your mouth out thoroughly and drink
plenty of water. Do not induce vomiting,
and seek medical attention immediately.
R Immediately change out of clothing which
has come into contact with tire sealant.
R If an allergic reaction occurs, seek medical
attention immediately.
! Do not operate the tire inflation compressor
for longer than eight minutes at a time without a break. It may otherwise overheat.
The tire inflation compressor can be operatedagain once it has cooled down.
Comply with the manufacturer’s safety instruc-
tions on the sticker on the tire inflation com-
pressor. Flat tire
337Breakdown assistance Z

MOExtended tires (tires with run-flat
properties)
With MOExtended tires (tires with run flat char-
acteristics), you can continue to drive your vehi- cle even if there is a total loss of pressure in one
or more tires.
MOExtended tires may only be used in conjunc-
tion with an active tire pressure loss warning
system or with an active tire pressure monitor
and on wheels specifically tested by Mercedes- Benz.
Notes on driving with MOExtended tires with a
flat tire (Y page 336).
i Vehicles equipped with MOExtended tires
are not equipped with a TIREFIT kit at the fac- tory. It is therefore recommended that you
additionally equip your vehicle with a TIREFIT
kit if you mount tires that do not feature run- flat properties, e.g. winter tires. A TIREFIT kit
may be obtained from a qualified specialist
workshop. Winter operation
General notes
Have your vehicle winter-proofed at a qualified
specialist workshop at the onset of winter.
Observe the notes in the "Changing a wheel"
section (Y page 371). Driving with summer tires
At temperatures below 45 ‡ (+7 †), the elas-
ticity of summer tires and therefore also the
traction and braking capability are reduced con-
siderably. Change the tires on your vehicle to
M+S tires. Using summer tires at very cold tem- peratures could cause cracks to form, thereby
damaging the tires permanently. Mercedes-
Benz cannot accept responsibility for this type
of damage. G
WARNING
Damaged tires can cause tire inflation pres-
sure loss. As a result, you could lose control of your vehicle. There is a risk of accident.
Check the tires regularly for signs of damage
and replace any damaged tires immediately. M+S tires
G
WARNING
M+S tires with a tire tread depth of less than
00CF in (4 mm) are not suitable for use in winter
and do not provide sufficient traction. There is
a risk of an accident.
M+S tires with a tread depth of less than 00CFin
(4 mm) must be replaced immediately.
At temperatures below 45 ‡(+7 †), use winter
tires or all-season tires. Both types of tire are
identified by the M+S marking.
Only winter tires bearing the 004Dsnowflake
symbol in addition to the M+S marking provide
the best possible grip in wintry road conditions.
Only these tires will allow driving safety systems
such as ABS and ESP ®
to function optimally in
winter. These tires have been developed specif-
ically for driving in snow.
Use M+S tires of the same make and tread on all wheels to maintain safe handling characteris-
tics.
Always observe the maximum permissible
speed specified for the M+S tires you have
mounted.
Once the winter tires are mounted:
X Check the tire pressures (Y page 357).
X Restart the tire pressure monitor
(Y page 358).
X Vehicles for Canada: restart the tire pres-
sure loss warning system (Y page 358).
Information about driving with an emergency
spare wheel (Y page 376). Snow chains
G
WARNING
If snow chains are installed to the front
wheels, they may drag against the vehicle
body or chassis components. This could
cause damage to the vehicle or the tires.
There is a risk of an accident. Winter operation
353Wheels and tires
Z

All passenger car tires must conform to the stat-
utory safety requirements in addition to these
grades.
i The actual values for tires are vehicle-spe-
cific and may deviate from the values in the
illustration.
Treadwear The treadwear grade is a comparative rating
based on the wear rate of the tire when tested
under controlled conditions on a specified U.S.
government course. For example, a tire graded
150 would wear one and one-half times as well
on the government course as a tire graded 100.
The relative performance of tires 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 cli-
mate.
Traction G
WARNING
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 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 on wet pavement as meas-
ured under controlled conditions on specified
government test surfaces of asphalt and con-
crete. A tire marked C may have poor traction
performance.
The safe speed on a wet, snow covered or icy
road is always lower than on dry road surfaces.
You should pay special attention to road condi-
tions when temperatures are around freezing
point.
Mercedes-Benz recommends a minimum tread
depth of 00CFin (4 mm) on all four winter tires.
Observe the legally required minimum tire tread
depth (Y page 352). Winter tires can reduce the
braking distance on snow-covered surfaces in
comparison with summer tires. The braking dis-
tance is still much further than on surfaces that are not icy or covered with snow. Take appro-
priate care when driving.
Further information on winter tires (M+S tires)
(Y
page 353).
Temperature G
WARNING
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 the
generation of heat and its ability to dissipate
heat when tested under controlled conditions
on a specified indoor laboratory test wheel. Sus- tained high temperature can cause the material
of the tire to degenerate and reduce tire life, and excessive temperature can lead to sudden tire
failure. The grade C corresponds to a level of
performance which all passenger car tires must
meet under the Federal Motor Vehicle Safety
Standard No. 109. Grades B and A represent
higher levels of performance on the laboratory
test wheel than the minimum required by law. All about wheels and tires
365Wheels and tires Z