PSI (pounds per square inch) (def-
inition) ...........................................340
Replacing ....................................... 341
Service life ..................................... 322
Sidewall (definition) ....................... 340
Snow chains .................................. 323
Speed rating (definition) ................ 339
Storing ...........................................3 41
Structure and characteristics
(definition) ..................................... 338
Summer tires in winter .................. 323
Temperature .................................. 335
TIN (Tire Identification Number)
(definition) ..................................... 340
Tire bead (definition) ......................3 40
Tire pressure (definition) ................ 340
Tire pressures (recommended) ...... 339
Tire size (data) ............................... 345
Tire size designation, load-bearing
capacity, speed rating .................... 335
Tire tread ....................................... 322
Tire tread (definition) ..................... 340
Total load limit (definition) ............. 340
Traction ......................................... 334
Traction (definition) ....................... 340
Tread wear ..................................... 334
TWR (permissible trailer drawbar
noseweight) (definition) ................. 340
Uniform Tire Quality Grading
Standards ...................................... 334
Uniform Tire Quality Grading
Standards (definition) .................... 339
Wear indicator (definition) ............. 340
Wheel and tire combination ........... 345
Wheel rim (definition) .................... 339
see Flat tire
Top Tether ............................................ 57
Tow-starting
Emergency engine starting ............ 318
Important safety notes .................. 316
Towing a trailer
Axle load, permissible .................... 361
Cleaning the trailer tow hitch ......... 304
Coupling up a trailer ...................... 202
Decoupling a traile r ....................... 204
Dri
ving tips .................................... 200
ESP
®(Electronic Stability Pro-
gram) ............................................... 66 Important safety notes .................. 199
Installing the ball coupling ............. 201
Lights display message .................. 233
Mounting dimensions .................... 361
Parking Assist PARKTRONIC .......... 174
Power supply ................................. 205
Pulling away with a trailer .............. 128
Removing the ball coupling ............ 205
Trailer loads ................................... 361
Towing away
Important safety guidelines ........... 316
Installing the towing eye ................ 317
Notes for 4MATIC vehicles ............ 318
Removing the towing eye ............... 317
Transporting the vehicle ................ 318
With both axles on the ground ....... 317
Towing eye ......................................... 306
Traffic reports
see also Digital Operator's Man-
ual .................................................. 263
Traffic Sign Assist
Display message ............................ 239
Function/notes ............................. 190
Important safety notes .................. 190
Instrument cluster display ............. 190
Trailer coupling
see Towing a trailer
Trailer loads and drawbar nose-
weights ............................................... 204
Trailer towing
Active Blind Spot Assist ................. 197
Active Lane Keeping Assist ............ 199
Blind Spot Assist ............................ 193
Permissible trailer loads and
drawbar noseweights ..................... 204
Transfer case ..................................... 139
Transmission
see Automatic transmission
Transmission position display ......... 134
Transporting the vehicle .................. 318
Traveling uphill
Brow of hill ..................................... 156
Driving downhill ............................. 157
Maximum gradient-climbing capa-
bility ............................................... 156
Trim pieces (cleaning instruc-
tions) .................................................. 305
Index21
!The backrest is heavy. Therefore, take care
when folding it down. Make sure that the head
restraints are pushed all the way in so that the backrests and seat cushions are not dam-
aged.
Observe the loading guidelines (
Ypage 270).
The left-hand and right-hand rear seat backrests
can be folded forwards separately to increase
the cargo compartment capacity.
Folding the rear bench seat forwards
If the driver's or front-passenger seat is set for a
larger person, it may not be possible to fold the rear bench seat forward. In this case, move the
front seats as far forward as possible.
XFold down the outer head restraints and move
the center head restraint to the lowest posi-
tion (
Ypage 94).
XFold seat cushion :up.
XPull release handle ;up in the direction of
the arrow until backrest :is fully released.
XFold backrest :forward until it reaches the
cargo compartment position.
XGuide seat belts ;under respective clips :.
Folding the rear bench seat back
XFold seat backrest:back until it engages.
Make sure not to trap the seat belt while doing so.
XSwing seat cushion ;back.
XReadjust the head restraint if necessary
(Ypage 94).
XReadjust the head restraint if necessary. You
can find information about this in the Digital
Operator's Manual.
Securing loads
Cargo tie-down rings
GWARNING
The Top Tether anchorages cannot secure a
load. If you secure a load with the Top Tether
anchorages, the Top Tether anchorages could
be pulled out during braking, abrupt changes
in direction or in the event of an accident. The
load could slip, tip over or be flung around and
274Stowage areas
Stowage and features
RAlways stow objects in such a way that they
cannot be tossed about in these or similar
situations.
RAlways make sure that objects do not pro-
trude out of the stowage spaces, luggage
nets or stowage nets.
REnsure that closable stowage spaces are
shut before beginning your journey.
RAlways stow and secure heavy, hard, poin-
ted, sharp-edged, fragile or large objects in
the cargo compartment.
Observe the loading guidelines (
Ypage 270).
!Only use the cup holders for containers of
the right size and which have lids. The drinks
could otherwise spill.
!Do not expose drinks bottles in the cup
holder in the center console to continuous,
strong and direct sunlight. The passenger
compartment in the area of the center con-
sole can otherwise be damaged by the con-
centrated and reflected sunlight.
Do not keep the KEYLESS-GO key in the tem-
perature-controlled cup holder (
Ypage 278).
Otherwise, the KEYLESS-GO key will not be rec-
ognized.
The stowage compartments in the doors provide
space for bottles with a capacity of up to
34 fl. oz. (1.0 l).
The bottles are not secured or prevented from
tipping over. Therefore, do not place any open
drink containers in the stowage compartments.
Cup holder in the front-compartment
center console
:Cover
;Cup holder
XTo open: slide cover :to its foremost posi-
tion.
XTo close: pull cover :back as far as it will go.
You can remove the cup holder's rubber mat for
cleaning. Clean with clear, lukewarm water only.
Temperature-controlled cup holder in
the front-compartment center console
:Cup holder
;Residual heat indicator lamp
=Switch
The temperature-controlled cup holder can be
used to keep cold drinks cool and warm drinks
warm.
XTurn the SmartKey to position 2in the ignition
lock.
XTo switch on the cooling function: press
and hold button =until the blue indicator
lamp on the button lights up.
XTo switch on the heating function: press
and hold button =until the red indicator
lamp on the button lights up.
XTo switch off the function: press and hold
button =until the indicator lamp on the but-
ton goes out.
When the heating function is used, the metal
insert of the cup holder is heated. Once a certain
temperature is reached, residual heat indicator
lamp ;lights up. This means that the metal
insert of the cup holder is hot. For this reason,
you must not reach into the cup holder metal
insert.
Do not use hard or sharp objects to clean the
cup holder. Use only a soft cloth to clean it.
278Features
Stowage and features
XVehicles with the AIRMATIC package:
make sure that the normal vehicle level is
selected (
Ypage 171).
XSwitch off the engine.
XVehicles without KEYLESS-GO:remove the
SmartKey from the ignition lock.
XVehicles with KEYLESS-GO: open the driv-
er's door.
The on-board electronics now have status 0.
This is the same as the SmartKey having been
removed.
XVehicles with KEYLESS-GO: remove the
Start/Stop button from the ignition lock
(
Ypage 125).
XMake sure that the engine cannot be started
via your smartphone (Ypage 127).
XMake sure that the passengers are not endan-
gered 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 barrier.
XGet out of the vehicle. Pay attention to traffic
conditions when doing so.
XClose the driver's door.
XUnload heavy luggage.
iOnly operate the tire inflation compressor
using a 12 V socket, even if the ignition is
turned off (
Ypage 280).
An emergency cut-out ensures that the on-
board voltage does not drop too low. If the on-
board voltage is too low, the power to the
sockets is automatically cut. This ensures
that there is sufficient power to start the
engine.
MOExtended tires (tires with run-flat
properties)
General notes
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. 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-bear-
ing capacity and the speed index (
Ypage 335). MOExtended tires may only be used in conjunc-
tion 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:
Robserve the instructions in the display mes-
sages (Ypage 244).
Rcheck the tire for damage.
Rif driving on, observe the following notes.
The driving distance possible in run-flat mode is
approximately 50 miles (80 km) when the vehi-
cle 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:
Rvehicle speed
Rroad condition
Routside temperature
The driving distance possible in run-flat mode
may be reduced by extreme driving conditions
or maneuvers, or it can be increased through a
moderate style of driving.
The driving dista
nce possible in run-flat mode is
counted from the moment the tire pressure loss
warning appears in the multifunction display.
You must not exceed a maximum speed of
50 mph (80 km/h).
When replacing one or all tires, please observe
the following specifications for your vehicle's
tires:
Rsize
Rtype and
Rthe "MOExtended" mark
Vehicles equipped with MOExtended tires are
not equipped with a TIREFIT kit at the factory. 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
GWARNING
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.
Flat tire307
Breakdown assistance
Z
Maximum permissible gross vehicle
weight rating
XSpecification for maximum gross vehicle
weight:is listed in the Tire and Loading
Information placard: "The combined weight of occupants and cargo should never exceed
XXX kilograms or XXX lbs."
The gross weight of all vehicle occupants, load
and luggage must not exceed the specified
value.
iThe specifications shown on the Tire and
Loading Information placard in the illustration are examples. The maximum permissible
gross vehicle weight rating is vehicle-specific
and may differ from that in the illustration.
You can find the valid maximum permissible
gross vehicle weight rating for your vehicle on
the Tire and Loading Information placard.
Number of seats
Maximum number of seats :indicates the
maximum number of occupants allowed to
travel in the vehicle. This information can be
found on the Tire and Loading Information plac-
ard.
iThe specifications shown on the Tire and
Loading Information placard in the illustration
are examples. The number of seats is vehicle-
specific and can differ from the details shown.
The number of seats in your vehicle can be
found on the Tire and Loading Information
placard.
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 pur-
suant to the "National Traffic and Motor Vehicle
Safety Act of 1966".
XStep 1: Locate the statement "The combined
weight of occupants and cargo should never
exceed XXX kg or XXX lbs." on your vehicle’s
Tire and Loading Information placard.
XStep 2: Determine the combined weight of
the driver and passengers that will be riding in your vehicle.
XStep 3: Subtract the combined weight of the
driver and passengers from XXX kilograms or
XXX lbs.
XStep 4: The resulting figure equals the avail-
able amount of cargo and luggage load capa-
city. For example, if the "XXX" amount equals
1400 lbs and there will be five 150-lb pas-
sengers in your vehicle, the amount of avail-
able cargo and luggage load capacity is
650 lbs (1400 - 750 (5 x 150) = 650 lbs).
XStep 5: Determine the combined weight of
luggage and cargo being loaded on the vehi-
cle. That weight may not safely exceed the
available 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 varying
seating configurations and number and size of occupants. The following examples use a load limit of
332Loading the vehicle
Wheels and tires
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 ofãin (4 mm) on all four winter tires.
Observe the legally required minimum tire tread
depth (
Ypage 322). 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)
(
Ypage 323).
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 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.
Tire labeling
Overview
:Uniform Tire Quality Grading Standards
(Ypage 339)
;Department of Transportation, Tire Identifi-
cation Number (Ypage 338)
=Maximum load rating (Ypage 338)
?Maximum tire pressures (Ypage 327)
AManufacturer
BTire material (Ypage 338)
CTire size designation, load-bearing capacity
and speed rating (Ypage 335)
DLoad index (Ypage 337)
ETire name
The markings described above are on the tire in
addition to the tire name (sales designation) and
the manufacturer's name.
iTire data is vehicle-specific and may deviate
from the data in the example.
Tire size designation, load-bearing
capacity and speed rating
GWARNING
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
All about wheels and tires335
Wheels and tires
Z
tire load rating and speed rating required for
your vehicle.
:Tire width
;Nominal aspect ratio in %
=Tire code
?Rim diameter
ALoad bearing index
BSpeed 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. man-
ufacturing standards.
If "LT" precedes the size description: these are
light truck tires according to U.S. manufacturing
standards.
If "T" precedes the size description: compact
emergency wheels with high tire pressure that
are only designed for temporary use in an emer-
gency.
Tire width: tire width:shows the nominal tire
width in millimeters.
Height-width ratio: aspect ratio;is the size
ratio between the tire height and tire width and
is shown in percent. The aspect ratio is calcula-
ted by dividing the tire width by the tire height.
Tire code:tire code =specifies the tire type.
"R" represents radial tires; "D" represents diag-
ona l ti
res; "B" represents diagonal radial tires.
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).
Rim diameter:
rim diameter?is the diameter
of the bead seat, not the diameter of the rim
flange. The rim diameter is specified in
inches (in).
Load-bearing index: load-bearing indexAis a
numerical code that specifies the maximum
load-bearing capacity of a tire.
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 331).
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 (
Ypage 338).
For further information on the load bearing
index, see "Load index" (
Ypage 337).
Speed rating:speed rating Bspecifies the
approved maximum speed of the tire.
iTire data is vehicle-specific and may deviate
from the data in the example.
Rega rdle
ss of the speed rating, always observe
the speed limits. Drive carefully and adapt your
driving style to the traffic conditions.
Summer tires
IndexSpeed rating
Qup to 100 mph (160 km/h)
Rup to 106 mph (170 km/h)
Sup to 112 mph (180 km/h)
Tup to 118 mph (190 km/h)
Hup to 130 mph (210 km/h)
Vup to 149 mph (240 km/h)
Wup to 168 mph (270 km/h)
Yup to 186 mph (300 km/h)
ZR...Yup to 186 mph (300 km/h)
ZR...(..Y)over 186 mph (300 km/h)
ZRover 149 mph (240 km/h)
ROptionally, tires with a maximum speed of
over 149 mph (240 km/h) may have "ZR" in
336All about wheels an d tires
Wheels and tires
Bar
Metric unit for tire pressure. 14.5038 pounds
per square inch (psi) and 100 kilopascals (kPa)
are the equivalent of 1 bar.
DOT (Department of Transportation)
DOT-marked tires fulfill the requirements of the
U S Department of Transportation.
Normal occupant weight
The number of occupants for which the vehicle
is designed multiplied by 68 kilograms (150 lbs).
Uniform Tire Quality Grading Standards
A uniform standard to grade the quality of tires
with regards to tread quality, tire traction and
temperature characteristics. The quality grad-
ing assessment is made by the manufacturer
following specifications from the U.S. govern-
ment. The ratings are molded into the sidewall of
the tire.
Recommended tire pressures
The recommended tire pressure applies to the
tires mounted at the factory.
The Tire and Loading Information placard con-
tains the recommended tire pressures for cold
tires 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 and
optional equipment available for the vehicle,
regardless of whether it isactua
lly installed on
the vehicle or not.
Rim
This is the part of the wheel on which the tire is
mounted.
GAWR (Gross Axle Weight Rating)
The GAWR is the maximum gross axle weight
rating. The actual load on an axle must never
exceed the gross axle weight rating. The gross
axle weight rating can be found on the vehicle
identification plate on the B-pillar on the driver's
side.
Speed rating
The speed rating is part of the tire identification.
It specifies the speed range for which the tire is
approved.
GTW (Gross Trailer Weight)
The GTW is the weight of a trailer including the
weight of the load, luggage, accessories etc. on
the trailer.
GVW (Gross Vehicle Weight)
The gross vehicle weight includes the weight of the vehicle including fuel, tools, the spare wheel,
accessories installed, occupants, luggage and
the drawbar noseweight, if applicable. The gross
vehicle weight must not exceed the gross vehi-
cle weight rating GVWR as specified on the vehi-
cle identification plate on the B-pillar on the
driver's side.
GVWR (Gross Vehicle Weight Rating)
The GVWR is the maximum permissible gross
weight of a fully loaded vehicle (the weight of the
vehicle including all accessories, occupants,
fuel, luggage and the drawbar nosew
eight, if
applicable). The gross vehicle weight rating is
specified on the vehicle identification plate on
the 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 optional
equipment
Kilopascal (kPa)
Metric unit for tire pressure. 6.9 kPa corre-
sponds to 1 psi. Another unit for tire pressure is
bar. 100 kilopascals (kPa) are the equivalent of
1 bar.
Load index
In addition to the load-bearing index, the load
index may also be imprinted on the sidewall of
the tire. This specifies the load-bearing capacity
more precisely.
Curb weight
The weight of a vehicle with standard equipment
including the maximum capacity of fuel, oil and
coolant. It also includes the air-conditioning sys-
All about wheels and tires339
Wheels and tires
Z