Tire-change tool kit
........................... 326
TIREFIT kit .......................................... 328
Tires
Aspect ratio (definition) ................. 366
Average weight of the vehicle
occupants (definition) .................... 365
Bar (definition) ............................... 364
Changing a whee l.......................... 367
Characteristics .............................. 364
Checking ........................................ 345
Curb weight (definition) ................. 366
Definition of terms ......................... 364
Direction of rotation ...................... 367
Display message ............................ 267
Distribution of the vehicle occu-
pants (definition) ............................ 367
DOT (Department of Transporta-
tion) (definition) ............................. 365
DOT, Tire Identification Number
(TIN) ............................................... 364
GAWR (Gross Axle Weight Rating)
(definition) ..................................... 365
General notes ................................ 372
GVW (Gross Vehicle Weight) (def-
inition) ........................................... 365
GVWR (Gross Vehicle Weight Rat-
ing) (definition) .............................. 365
Important safety notes .................. 344
Increased vehicle weight due to
optional equipment (definition) ...... 365
Information on driving .................... 344
Kilopascal (kPa) (definition) ........... 365
Labeling (overview) ........................ 361
Load bearing index (definition) ...... 366
Load index ..................................... 363
Load index (definition) ................... 365
Maximum load on a tire (defini-
tion) ............................................... 366
Maximum loaded vehicle weight
(definition) ..................................... 365
Maximum permissible tire pres-
sure (definition) ............................. 366
Maximum tire load ......................... 363
Maximum tire load (definition) ....... 366
MOExtended tire s.......................... 346
Optional equipment weight (defi-
nition) ............................................ 366 PSI (pounds per square inch) (def-
inition) ........................................... 366
Replacing ....................................... 367
Service life ..................................... 346
Sidewall (definition) ....................... 366
Speed rating (definition) ................ 365
Storing ........................................... 367
Structure and characteristics
(definition) ..................................... 364
Temperature .................................. 360
TIN (Tire Identification Number)
(definition) ..................................... 366
Tire bead (definition) ...................... 366
Tire pressure (definition) ................ 366
Tire pressures (recommended) ...... 365
Tire size (data) ............................... 372
Tire size designation, load-bearing capacity, speed rating .................... 361
Tire tread ....................................... 345
Tire tread (definition) ..................... 366
Total load limit (definition) ............. 367
Traction ......................................... 360
Traction (definition) ....................... 366
Tread wear ..................................... 360
Uniform Tire Quality Grading
Standards ...................................... 359
Uniform Tire Quality Grading
Standards (definition) .................... 365
Wear indicator (definition) ............. 366
Wheel and tire combination ........... 374
Wheel rim (definition) .................... 365
see Flat tire
Top Tether ............................................ 67
Tow-starting
Emergency engine starting ............ 340
Important safety notes .................. 337
Towing away
Important safety guidelines ........... 337
Installing the towing eye ................ 338
Removing the towing eye ............... 339
With both axles on the ground ....... 339
With the rear axle raised ................ 339
Towing eye ......................................... 326
Transmission
see Automatic transmission
Transmission position display ......... 158
Transmission position display
(DIRECT SELECT lever) ...................... 158 Index
19
Observe the loading guidelines (Y
page 286).
The left-hand and right-hand rear seat backr- ests can be folded down separately to
increase the trunk capacity.
Folding the seat backrest forward i
Vehicles with memory function: when you
fold one or both parts of the rear seat back- rest forwards, the respective front seat
moves forward slightly, when necessary, inorder to avoid contact.
X Vehicles without memory function: if nec-
essary, move the driver's or front-
passenger seat forward.
X Open the trunk.
X Pull right-hand or left-hand rear seat back-
rest release handle :.
The corresponding rear seat backrest is
released. X
Fold rear seat backrest ;forwards.
X Move the driver's or front-passenger seat
back if necessary. Folding the seat backrest back !
Make sure that the seat belt does not
become trapped when folding the rear seat backrest back. Otherwise, it could be dam- aged. X
Move the driver's or front-passenger seat
forward if necessary.
X Fold rear seat backrest :back until it
engages.
If the rear seat backrest is not engaged and
locked, this will be shown in the multifunc-
tion display in the instrument cluster. A
warning tone also sounds.
X Move the driver's or front-passenger seat
back if necessary.
i You should always engage the rear seat
backrests if you do not need the through-
loading feature. This will prevent unauthor-
ized access to the trunk from the vehicle
interior. Securing cargo
Cargo tie-down rings General notes
Observe the following notes on securing
loads:
R Observe the loading guidelines
(Y page 286).
R Secure the load using the cargo tie-down
rings. 290
Stowage areasStowage and features
R
Always stow objects so that they cannot be
thrown around in such situations.
R Always make sure that objects do not pro-
trude from stowage spaces, parcel nets or
stowage nets.
R Close the lockable stowage spaces while
driving.
R Always stow and secure heavy, hard, poin-
ted, sharp-edged, fragile or bulky objects in
the trunk/cargo compartment.
Observe the loading guidelines (Y page 286).
! Make sure that any bottles weighing more
than 1.1 lb(0.5 kg) that are stored in the
bottle holder, rest on the vehicle floor. The bottle holder could otherwise be damaged. X
Press the outer edge of button :and slide
in the direction of the arrow until the bottle
fits into the opening.
X Insert the bottle into the bottle holder.
The bottle holder is suitable for bottles with a
capacity of 25 fl. oz. (0.7 l) to 54 fl. oz. (1.5 l).
The bo ttle holder does not secure the bottles;
it merely prevents them from tipping over. Sun visors
Overview G
WARNING
If the mirror cover of the vanity mirror is folded up when the vehicle is in motion, you could be
blinded by incident light. There is a risk of an
accident. Always keep the mirror cover folded down
while driving.
:
Mirror light
; Bracket
= Retaining clip, e.g. for a car park ticket
? Vanity mirror
A Mirror cover
Vanity mirror in the sun visor Mirror light
:only functions if the sun visor
is clipped into bracket ;and mirror cover A
has been folded up.
Glare from the side X
Fold down sun visor :.
X Pull sun visor :out of retainer ;.
X Swing sun visor :to the side.
X Slide sun visor :horizontally as required. Features
295Stowage an d features Z
Flat tire
Preparing the vehicle
Your vehicle may be equipped with: R MOExtended tires (tires with run-flat prop-
erties) (Y page 327)
Vehicle preparation is not necessary on
vehicles with MOExtended tires
R a TIREFIT kit (Y page 326)
R an emergency spare wheel (Y page 379)
Vehicles equipped with MOExtended tires are
not equipped with a TIREFIT kit at the factory. It is therefore recommended that you addi-
tionally 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 work-
shop.
Information on changing/mounting a wheel
(Y page 367).
X Stop the vehicle on solid, non-slippery and
level ground, as far away as possible from
traffic.
X Switch on the hazard warning lamps.
X Secure the vehicle against rolling away
(Y page 170).
X If possible, bring the front wheels into the
straight-ahead position.
X Vehicles with AIRMATIC: make sure that
"normal" level is selected (Y page 193).
X Switch off the engine.
X Remove the SmartKey from the ignition
lock.
or, on vehicles with KEYLESS‑GO: X Open the driver's door.
The on-board electronics now have status
0. This is the same as the SmartKey having
been removed.
X Remove the Start/Stop button from the
ignition lock (Y page 150).
X Make sure that the passengers are not
endangered as they do so. Make sure that
no one is near the danger area while a
wheel is being changed. Anyone who is not directly assisting in the wheel change
should, for example, stand behind the bar-
rier.
X Get out of the vehicle. Pay attention to traf-
fic conditions when doing so.
X Close the driver's door. MOExtended tires (tires with run-flat
properties)
General notes With MOExtended tires (tires with run flat
characteristics), you can continue to drive
your vehicle even if there is a total loss of
pressure in one or more tires. The affected
tire must not show any clearly visible damage.
You can recognize MOExtended tires by the
MOExtended marking which appears on the
sidewall of the tire. You will find this marking next to the tire size designation, the load-
bearing capacity and the speed index
(Y page 361).
MOExtended tires may only be used in con-
junction with an active tire pressure loss
warning system or with an active tire pressure
monitor.
If a pressure loss warning message
appears in the multifunction display:
R observe the instructions in the display mes-
sages (Y page 267).
R check the tire for damage.
R if driving on, observe the following notes.
The driving distance possible in run-flat mode is approximately 50 miles (80 km) when the
vehicle is partially laden and approximately
18 miles (30 km) when the vehicle is fully
laden.
In addition to the vehicle load, the driving dis- tance possible depends upon:
R vehicle speed
R road condition
R outside temperature Flat tire
327Roadside Assistance
Determining the correct load limit
Step-by-step instructions The following steps have been developed as
required of all manufacturers under Title 49,
Code of U.S. Federal Regulations, Part 575
pursuant to the "National Traffic and Motor
Vehicle Safety Act of 1966".
X Step 1: Locate the statement "The com-
bined weight of occupants and cargo
should never exceed XXX kg or XXX lbs." on your vehicle’s Tire and Loading Information
placard.
X Step 2: Determine the combined weight of
the driver and passengers that will be riding
in your vehicle.
X Step 3: Subtract the combined weight of
the driver and passengers from XXX kilo-
grams or XXX lbs.
X Step 4: The resulting figure equals the
available amount of cargo and luggage load
capacity. For example, if the "XXX" amount
equals 1400 lbs and there will be five
150-lb passengers in your vehicle, the
amount of available cargo and luggage load
capacity is 650 lbs (1400 - 750 (5 x 150) = 650 lbs).
X Step 5: Determine the combined weight of
luggage and cargo being loaded on the
vehicle. That weight may not safely exceed
the available cargo and luggage load capa- city calculated in step 4. Loading the vehicle
357Wheels andtires Z
Tire labeling
Overview :
Uniform Tire Quality Grading Standards
(Y page 365)
; Department of Transportation, Tire Iden-
tification Number (Y page 364)
= Maximum load rating (Y page 363)
? Maximum tire pressures (Y page 350)
A Manufacturer
B Tire material (Y page 364)
C Tire size designation, load-bearing capa-
city and speed rating (Y page 361)
D Load index (Y page 363)
E Tire name
The markings described above are on the tire in addition to the tire name (sales designa-
tion) and the manufacturer's name.
i Tire data is vehicle-specific and may devi-
ate from the data in the example.
Tire size designation, load-bearing
capacity and speed rating G
WARNING
Exceeding the stated tire load-bearing capa-
city and the approved maximum speed could
lead to tire damage or the tire bursting. There is a risk of accident. Therefore, only use tire types and sizes
approved for your vehicle model. Observe the
tire load rating and speed rating required for
your vehicle. :
Tire width
; Nominal aspect ratio in %
= Tire code
? Rim diameter
A Load bearing index
B Speed rating
General: depending on the manufacturer's
standards, the size imprinted in the tire wall
may not contain any letters or may contain
one letter that precedes the size description.
If there is no letter preceding the size descrip-
tion (as shown above): these are passenger
vehicle tires according to European manufac-
turing standards.
If "P" precedes the size description: these are
passenger vehicle tires according to U.S.
manufacturing standards.
If "LT" precedes the size description: these
are light truck tires according to U.S. manu-
facturing standards.
If "T" precedes the size description: compact emergency wheels with high tire pressure
that are only designed for temporary use in an
emergency.
Tire width: tire width:shows the nominal
tire width in millimeters.
Aspect ratio: aspect ratio;is the size ratio
between the tire height and tire width and is
shown in percent. The aspect ratio is calcu- All about
wheels and tires
361Wheels and tires Z
lated by dividing the tire width by the tire
height.
Tire code: tire code=specifies the tire type.
"R" represents radial tires; "D" represents
diagonal tires; "B" represents diagonal radial
tires.
Rim diameter: rim diameter?is the diam-
eter of the bead seat, not the diameter of the
rim flange. The rim diameter is specified in
inches (in).
Load-bearing index: load-bearing indexA
is a numerical code that specifies the maxi-
mum load-bearing capacity of a tire.
Do not overload the tires by exceeding the
specified load limit. The maximum permissi-
ble load can be found on the vehicle's Tire and Loading Information placard on the B-pillar on
the driver's side (Y page 355).
Example:
Load-bearing index 91 indicates a maximum
load of 1,356 lb (615 kg) that the tires can
bear. For further information on the maximum
tire load in kilograms and lbs, see
(Y page 363).
For further information on the load bearing
index, see "Load index" (Y page 363).
Speed rating: speed ratingBspecifies the
approved maximum speed of the tire.
i Tire data is vehicle-specific and may devi-
ate from the data in the example.
Regardless of the speed rating, always
observe the speed limits. Drive carefully and
adapt your driving style to the traffic condi-
tions.
Summer tires Index Speed rating
Q up to 100 mph (160 km/h)
R up to 106 mph (170 km/h)
S up to 112 mph (180 km/h)
T up to 118 mph (190 km/h) Index Speed rating
H up to 130 mph (210 km/h)
V up to 149 mph (240 km/h)
W up to 168 mph (270 km/h)
Y up to 186 mph (300 km/h)
ZR...Y up to 186 mph (300 km/h)
ZR...(..Y) over 186 mph
(300 km/h) ZR over 149 mph
(240 km/h) R
Optionally, tires with a maximum speed of
over 149 mph (240 km/h) may have "ZR" in the size description, depending on the
manufacturer (e.g. 245/40 ZR 18).
R If a service specification is available, the
maximum speed is limited according to the
speed rating in the service specification.
Example: 245/40 ZR18 97 Y.In this exam-
ple, "97 Y" is the service specification. The letter "Y" represents the speed rating. The
maximum speed of the tire is limited to
186 mph (300 km/h).
If the size description of your tire includes
"ZR" and there are no service specifica-
tions, ask the tire manufacturer in order to
find out the maximum speed.
R The size description for all tires with maxi-
mum speeds of over 186 mph (300 km/h)
must include "ZR", andthe service specifi-
cation must be given in parentheses. Exam- ple: 275/40 ZR 18 (99 Y). Speed rating
"(Y)" indicates that the maximum speed of
the tire is over 186 mph (300 km/h). Ask
the tire manufacturer about the maximum
speed.
All-weather tires and winter tires Index Speed rating
Q M+S
1 up to 100 mph (160 km/h)
T M+S
1 up to 118 mph (190 km/h)
1
Or M+S ifor winter tires. 362
All about wheels and tiresWheels and tires
Curb weight
The weight of a vehicle with standard equip-
ment including the maximum capacity of fuel, oil and coolant. It also includes the air-condi-
tioning system and optional equipment if
these are installed in the vehicle, but does not include passengers or luggage.
Maximum load rating
The maximum load rating is the maximum
permissible weight in kilograms or lbs 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)
A standard unit of measure for tire pressure.
Aspect ratio
Relationship between tire height and tire
width in percent.
Tire pressure
Pressure inside the tire applying an outward
force to every square inch of the tire's sur-
face. The tire pressure is specified in pounds
per square inch (psi), in kilopascal (kPa) or in
bar. The tire pressure should only be correc-
ted when the tires are cold.
Cold tire pressure
The tires are cold:
R if the vehicle has been parked without
direct sunlight on the tires for at least three
hours and
R if the vehicle has not been driven further
than 1 mile (1.6 km) Tread
The part of the tire that comes into contact
with the road.
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 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, level control, a roof rack or a high-
performance battery, are not included in the
curb weight and the weight of the accesso-
ries.
TIN (Tire Identification Number)
This is a unique identifier which can be used
by a tire manufacturer to identify tires, for
example for a product recall, and thus identify the purchasers. The TIN is made up of the
manufacturer's identity code, tire size, tire
type code and the manufacturing date.
Load bearing index
The load bearing index (also load index) is a
code that contains the maximum load bearing
capacity of a tire.
Traction
Traction is the result of friction between the
tires and the road surface.
Tread wear indicators
Narrow bars (tread wear bars) that are dis-
tributed over the tire tread. If the tire tread is level with the bars, the wear limit of áin
(1.6 mm) has been reached. 366
All about wheels and tiresWheels and tires