2017 MERCEDES-BENZ METRIS light

Load index
Load index (example)
In addition to the load-bearing index, load rat-
ing:may be imprinted after the letters that
identify speed rating on the sidewall of the tire
(
Ypage 291).
RIf no specification is given: no text (as in the
example above), represents a standard load
(SL) tire
RRF or Reinforced: represents a reinforced tire.
Alternatively, depending on the manufac-
turer, the designation XL (Extra Load) can be
used.
RLight Load: represents a light load tire
RC, D, E: represents a load range that depends
on the maximum load that the tire can carry at
a certain pressure
iTire data is vehicle-specific and may deviate
from the data in the example.
Maximum tire load
Example: maximum tire load
Maximum tire load :is the maximum permis-
sible weight for which the tire is approved.
Do not overload the tires by exceeding the
specified load limit. The maximum permissible load can be found on the vehicle's Tire and
Loading Information placard on the B-pillar on
the driver's side (
Ypage 288).
iThe actual values for tires are specific to
each vehicle and may deviate from the values
in the illustration.
DOT, Tire Identification Number (TIN)
U.S. tire regulations stipulate that every tire
manufacturer or retreader must imprint a TIN in
or on the sidewall of each tire produced.
The TIN is a unique identification number. The
TIN enables the tire manufacturers or retreaders
to inform purchasers of recalls and other safety-
relevant matters. It makes it possible for the
purchaser to easily identify the affected tires.
The TIN is made up of manufacturer identifica-
tion code ;, tire size =, tire type code ?and
manufacturing date A.
DOT (Department of Transportation): tire
symbol :indicates that the tire complies with
the requirements of the U.S. Department of
Transportation.
Manufacturer identification code: manufac-
turer identification code ;provides details on
the tire manufacturer. New tires have a code
with two symbols. Retreaded tires have a code
with four symbols.
Further information about retreaded tires
(
Ypage 277).
Tire size: identifier=describes the tire size.
Tire type code: tire type code?can be used by
the manufacturer as a code to describe specific
characteristics of the tire.
Date of manufacture: date of manufactureA
provides information about the age of a tire. The first and second positions represent the week of
manufacture, starting with "01" for the first cal-
endar week. Positions three and four represent
What you should know about wheels and tires293
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GVW (Gross Vehicle Weight)
The gross vehicle weight includes the weight of
the vehicle including fuel, tools, spare wheel,
accessories installed, occupants, luggage and
the drawbar noseweight if applicable. The gross
vehicle weight must never exceed the permissi-
ble gross weight (GVWR) specified on the
B-pillar on the driver's side (
Ypage 303).
GVWR (Gross Vehicle Weight Rating)
The GVWR is the maximum permitted gross
weight of the fully laden vehicle (weight of the
vehicle including all accessories, occupants,
fuel, luggage and the drawbar noseweight if
applicable). The permissible gross weight is
specified on the vehicle identification plate on
the B-pillar on the driver's side (
Ypage 303).
Maximum weight of the laden vehicle
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 optional
equipment
Kilopascal (kPa)
Metric unit for tire pressure. 6.9 kPa are the
equivalent of 1 psi. Another tire pressure unit is
bar. 100 kilopascals (kPa) are the equivalent of
1 bar.
Load index
In addition to the load bearing index, a load
index can be stamped onto the sidewall of the
tire. It specifies the load-bearing capacity of the
tire more precisely.
Curb weight
The weight of a vehicle with standard equipment
including the maximum filling capacity of fuel,
oil, and coolant. It also includes the air-condi-
tioning system and optional equipment if these
are installed on the vehicle, but does not include
passengers or luggage.
Maximum tire load
The maximum tire load in kilograms or pounds is
the maximum weight for which a tire is
approved.
Maximum permissible tire pressure
Maximum permissible tire pressure for one tire.
Maximum load on one tire
Maximum load on one tire. This is calculated by
dividing the maximum axle load of one axle by
two.
PSI (Pounds per square inch)
Standard unit of measurement for tire pressure.
Aspect ratio
Relationship between tire height and width in
percent.
Tire pressure
Pressure inside the tire applying an outward
force to every square inch of the tire's surface.
Tire pressure is specified in pounds per square
inch (psi), in kilopascal (kPa) or in bar. Tire pres-
sure should only be corrected when the tires are
cold.
Cold tire pressure
The tires are cold:
Rif the vehicle has been parked for at least
three hours without direct sunlight on the
tires, and
Rif the vehicle has not been driven further than
1 mile (1.6 km)
Tire tread
The part of the tire that comes into contact with
the road.
Tire bead
The tire bead ensures that the tire sits securely
on the wheel. There are several steel wires in the bead to prevent the tire from coming loose from
the wheel rim.
Sidewall
The part of the tire between the tread and the
tire bead.
Weight of optional extras
The combined weight of those optional extras
that weigh more than the replaced standard
parts and more than 2.3 kg (5 lbs). These
optional extras, such as high-performance
brakes, a roof rack or a high-performance bat-
tery, are not included in the curb weight and theweight of the accessories.
What you should know about wheels and tires295
Wheels and tires
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Mounting a wheel
Vehicle preparation
XStop the vehicle as far away as possible from
traffic and on a level, firm and non-slip sur-
face.
XIf your vehicle poses a risk to approaching
traffic, switch on the hazard warning lamps.
XApply the parking brake.
XTurn the front wheels to the straight-ahead
position.
XShift the transmission to position P.
XSwitch off the engine.
XPassengers should leave the vehicle. Make
sure that the passengers are not endangered
as they do so.
XMake sure that no one is near the danger area
while the wheel is being changed. Anyone
who is not directly assisting in the wheel
change should, for example, stand behind the
barrier.
XPlace the warning triangle or warning lamp at
a suitable distance.
Observe the legal requirements on the cor-
rect use of the warning triangle or warning
lamp for the country in which you are cur-
rently driving
XSecure the vehicle to prevent it from rolling
away.
Observe the safety notes on parking under
"Driving and parking" (
Ypage 133)
XOn level terrain: place chocks or other suit-
able objects under the front and rear of the
wheel that is diagonally opposite the wheel to
be changed.
XOn slight inclines: place chocks or other
suitable objects under the wheels on the front and rear axles opposite the wheel to be
changed.
XIf included in the vehicle equipment, take the
tire-changing tool kit out of the vehicle tool kit
(
Ypage 270).
Apart from some country-specific variants,
vehicles are not equipped with tire-changing
tools. Some tools for changing a wheel are
specific to the vehicle. Consult a qualified
specialist workshop for more information on
which tools are required to perform a wheel
change on your vehicle.
XIf included in the vehicle equipment, remove
the spare wheel from the spare wheel bracket (
Ypage 301). Observe the safety notes listed
under "Spare wheel" (Ypage 301).
XCarefully remove the hub caps.
XUsing lug wrench :, loosen the wheel bolts
on the wheel to be changed counter-clock-
wise by about one full turn. Do not remove the
wheel bolts.
Raising the vehicle
GWARNING
If you do not position the jack correctly at the
appropriate jacking point of the vehicle, the
jack could tip over with the vehicle raised.
There is a risk of injury.
Only position the jack at the appropriate jack-
ing point of the vehicle. The base of the jack
must be positioned vertically, directly under
the jacking point of the vehicle.
GWARNING
On uphill and downhill slopes, the jack could
tip over with the vehicle raised. There is a risk
of injury.
Do not change wheels on uphill or downhill
gradients. Notify a qualified specialist work-
shop.
!Only position the jack on the jacking points
intended for this purpose. You could other-
wise damage the vehicle.
Observe the following when raising the vehicle:
RTo raise the vehicle, only use the vehicle-spe-
cific jack that has been tested and approved
by Mercedes-Benz. If the jack is used incor-
Changing wheels297
Wheels and tires
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Only use wheel bolts that have been designed
for the wheel and the vehicle. For safety rea-
sons, Mercedes-Benz recommends that you
only use wheel bolts which have been approved
for Mercedes-Benz vehicles and the respective
wheel.
!On vehicles equipped with a tire pressure
monitor, electronic components are located
in the wheel.
Tire-mounting tools should not be used near
the valve. This could damage the electronic
components.
Only have tires changed at a qualified spe-
cialist workshop.
XClean the wheel and wheel hub contact sur-
faces.
XSlide the new wheel onto the wheel hub and
push it on.
XScrew in the wheel bolts and tighten them
lightly.
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.
:—AWheel bolts
XPlace the adapter and the ratchet on the hex-
agon head nut of the jack such that the let-
tering AB/DOWN is visible.
XTurn the ratchet in the AB/DOWNdirection
until the vehicle is once again standing firmly
on the ground.
XPut the jack aside.
XTighten the wheel bolts evenly in a crosswise
pattern in the sequence indicated (: toA).
Tighten the wheel bolts to the following tight-
ening torques:
RSteel wheel 147 lb-ft(200 Nm)
RAlloy wheel 133 lb-ft(180 Nm)
XTurn the jack back to its out-of-use position.
XStow the jack and the rest of the tire-change
tool kit in the vehicle again.
XWheel with hub cap: position the opening for
the tire valve in the hub cap over the tire valve.
XPush the edge of the hub cap with both hands
against the wheel until it clicks into place.
Make sure the hub cap retaining catches
engage on the steel wheel.
XIf included in the vehicle equipment, secure
the faulty wheel in the spare wheel bracket
(
Ypage 301). Otherwise, transport the faulty
wheel in the cargo compartment.
XCheck the tire pressure of the newly mounted
wheel and adjust it if necessary.
Observe the recommended tire pressure
(
Ypage 280).
Vehicles with the tire pressure monitor sys-
tem: all mounted wheels must be equipped
with functioning sensors.
XRetighten the wheel bolts or wheel nuts to the
specified tightening torque after the vehicle
has been driven for 30 miles (50 km).
Changing wheels299
Wheels and tires
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