2017 MERCEDES-BENZ C-Class COUPE traction control

Snow chains
GWARNING
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 arisk of an accident.
To avoid hazardous situations:
Rnever install snow chains to the front
wheels
Ralways install snow chains in pairs to the
rear wheels.
For safety reasons, Mercedes-Benz recom-
mends that you only use snow chains that have
been specially approved for your vehicle by
Mercedes-Benz, or are of acorresponding
standard of quality. For more information,
please contact aqualified specialist workshop.
If you inten dtomount snow chains, please bear
the following points in mind:
RSnow chains may not be mounted on all
wheel/tire combinations .Permissible wheel-
tire combination s(
Ypage 340).
ROnly use snow chains when driving on roads
completely covered by snow. Remove the
snow chains as soon as possible when you
come toaroad that is not snow-covered.
RLocal regulations may restrict the use of snow
chains. Observe the appropriate regulations if
you wish to mount snow chains.
RDo not exceed the maximum permissible
speed of 31 mph (50 km/h).
ROn vehicles with AIRMATIC, you must drive at
raised vehicle level if snow chains have been
installed (
Ypage 172).
RWhen snow chains are installed, never use
Active Parking Assist (Ypage 177).
You may wish to deactivate ESP®when pulling
away with snow chains installed:
RAll vehicles (except Mercedes ‑AMG vehicles)
(Ypage 67)
RMercedes‑AM Gvehicles (Ypage 68)
You can thereby allow the wheels to spin in a
controlled manner, achieving an increased driv- ing force (cuttin gaction).
Tire pressure
Tire pressures pecifications
Important safety notes
GWARNING
Underinflated or overinflated tires pose the
following risks:
Rthe tires may burst, especially as the load
and vehicle speed increase.
Rthe tires may wear excessively and/or
unevenly, which may greatly impair tire
traction.
Rthe driving characteristics, as well as steer-
ing and braking, may be greatly impaired.
There is arisk of an accident.
Follow recommended tire inflation pressures
and check the pressure of all the tires includ-
ing the spare wheel:
Rmonthly, at least
Rif the load changes
Rbefore beginning along journey
Runder different operating conditions, e.g.
off-road driving
If necessary, correct the tire pressure.
The data on the Tire and Loading Information
placard and tire pressure table shown here are
examples. Tire pressure specifications are vehi-
cle-specific and may deviate from the data
shown here. The tire pressure specifications
that are valid for your vehicle can be found on
the Tire and Loading Information placard and
tire pressure table on the vehicle.
General notes
The recommended tire pressures for the tires
mounted at the factory can be found on the
labels described here.
Further information on tire pressures can be
obtained at aqualified specialist workshop.
Tire pressure319
Wheels and tires
Z

Vehicleidentificatio nplate
Even if yo uhavec alculate dthe totalc argo care-
fully ,you shoul dstillm ake sure thatt he gross
vehicl eweigh trating and the gross axl eweigh t
rating are not exceeded .Detail scan be found on
the vehicl eide ntificatio nplate on the B-pillar on
the driver' ssideoft he vehicl e(
Ypage 326).
Permissibl eGrossVehicl eWeight Rating
(GVWR): the gross weight of the vehicle, al lpas -
sengers ,loa da nd traile rload/n oseweight (if
applicable) must not exceed the permissible
gross vehicl eweigh t.
Gros sAxleW eight Ratin g(GAWR): the maxi-
mump ermissibl eweigh tthatc an be carrie dby
one axl e(front or rea raxle).
To ensure thaty ourvehicl edoesn ot exceed the
maximu mpermissibl evalue s(gros sv ehicle
weight and maximu mgross axl eweigh trating),
have your loaded vehicl e(including driver, occu-
pants, cargo, and ful ltraile rloa difa pplicable)
weighed on asuitabl evehicl eweigh bridge.
Alla bout wheels and tires
Uniform Tire Quality Grading Stand-
ards
Overvie wofTire Quality Grading Stand-
ards
Uniform Tire Quality Grading Standard sare U.S.
government specifications. Their purpose is to
provid edrivers with uniform reliabl einformation
on tire performanc edata. Tire manufacturers
have to grade tire susing thre eperformanc efac-
tors: :trea dwearg rade, ;tractio ngrade and
= temperature grade .These regulations do not
appl ytoC anada. Nevertheless ,alltire ssoldi n
North America are provided with the corre- sponding quality grading marking
sonthe side-
wall of the tire.
Quality grade scan be found, where applicable,
on the tire sidewall between trea dshoulde rand
maximu msection width.
Example:
RTreadwear grade: 200
RTraction grade:AA
RTemperature grade: A
All passenger car tire smustc onform to the stat-
utory safety requirements in additio ntothese
grades.
iThe actual value sfor tire sare vehicle-spe-
cifi cand mayd eviate from the value sinthe
illustration.
Treadwear
The treadwea rgrade is acomparative rating
based on the wear rate of the tire when tested
under controlled conditions on aspecified U.S.
government course.F or example,atire graded
150 woul dwearo ne and one-hal ftime sasw ell
on the government test trac kasat ire graded
100.
The relative performance of tire sdepen ds upon
the actual conditions of thei ruse,h owever, and
mayd epartsignificantly from the norm du eto
variations in driving habits, service practices
and difference sinroadc haracteristic sand cli-
mate.
Traction
GWARNING
The tractio ngrade assigned to thist ire is
based on straight-ahea dbraking traction
tests ,and does not includ eacceleration, cor-
nering, hydroplaning, or peak tractio nchar-
acteristics.
!Avoi dwheelspin.T hisc an lead to damage to
the drive train.
The tractio ngrade s–from highest to lowest –
are AA, A, Band C. Those grade srepresent the
tire's ability to stop on we tpavement as meas-
ured under controlled conditions on specified
government test surfaces of asphalt and con-
crete .Atire marked Cmayhave poor traction
performance.
Al la bout wheels and tires329
Wheel sand tires
Z

PSI (pounds per squareinch)
Astandard unit of measure for tire pressure.
Aspect ratio
Relationship between tire height and tire width
in percent.
Tire pressure
This is pressure inside the tire applying an out-
ward force to each 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 corrected when
the tires are cold.
Cold tire pressure
The tires are cold:
Rif the vehicle has been parked with the tires
out of direct sunlight for at least three hours
and
Rif the vehicle has not been driven further than
1m ile (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 5lbs (2.3 kg). These
optional extras, such as high-performance
brakes, level control, aroof rack or ahigh-per-
formanceb attery, are not included in the curb
weight and the weight of the accessories.
TIN (Tire Identification Number)
This is aunique identifier which can be used by
at ire manufacturer to identify tires, for example
for aproduct recall, and thus identify the pur-
chasers. The TIN is made up of the manufactur-
er's identity code, tire size, tire type code and
the manufacturing date.
Load bearing index
The load bearing index (also load index) is acode
that contains the maximum load bearing capa-
city of atire.
Traction
Traction is the result of friction between the tires
and the road surface.
Treadwear indicators
Narrow bars (tread wear bars) that are distrib-
uted over the tire tread. If the tire tread is level
with the bars, the wear limit of áin (1.6 mm)
has been reached.
Occupant distribution
The distribution of occupants in avehicle at their
designated seating positions.
Total load limit
Nominal load and luggage load plus 68 kg
(15 0lbs)m ultiplied by the number of seats in
the vehicle.
Changing awheel
Flat tire
The "Breakdown assistance" section
(Ypage 300) contains information and notes on
how to deal with aflat tire. Information on driv-
ing with MOExtended tires in the event of aflat
tire can be found under "MOExtended tires (tires
with run-flat characteristics" (
Ypage 301).
Rotating the wheels
GWARNING
Interchanging the front and rear wheels may
severely impair the driving characteristics if
the wheels or tires have different dimensions. The wheel brakes or suspension components
may also be damaged. There is arisk of acci-
dent.
Rotate front and rear wheels only if the wheels and tires are of the same dimensions.
!On vehicles equippedw ithatire pressure
monitor ,electronic components are located
in the wheel.
Changing awheel335
Wheels and tires
Z