2018 MERCEDES-BENZ SL CLASS wheel

Example: current tire pressure display
For informatio nont he message display, refer to
the "Checking the tire pressure electronically"
sectio n( Y
page 269).
Important safety notes
G WARNING
Each tire ,i ncluding the spar e( if provided),
shoul dbec hecked at leas to nce am onth
when col da nd inflate dtot he pressure rec-
ommended by the vehicl em an ufacturer on
the Tire and Loading Informatio np la card on
the driver's door B-pillar or the tire pressure
labe lont he insid eoft he fuel fille rf lap. If your
vehicl eh as tire sofad if ferent size tha nt he
size indicated on the Tire and Loading Infor-
matio np la card or the tire pressure label, you
shoul dd et ermine the prope rt ire pressure for
thos et ires.
As an adde ds af ety feature, your vehicl eh as
been equipped with at ire pressure monitoring
system (TPMS )t ha ti llum inate sal ow tire pres-
sure telltale when one or mor eofy ou rt ires
ar es ig nificantl yu nderinflated .A ccordingly,
when the lo wt ire pressure telltale illuminates,
yo us houl ds top and check your tire sass oon
as possible, and inflate the mtot he proper
pressure. Driving on as ig nificantl yu nderin-
flated tire causes the tire to overheat and can
lead to tire failure. Underinflatio na ls o
reduce sf ue le fficiency and tire trea dl if e, and
ma ya ff ect the vehicle's handling and stop-
ping ability.
Please note tha tt he TPMS is not as ubst itute
for prope rt
ire ma intenance ,a nd it is the driv-
er' sr esponsibility to maintain correct tire
pressure, eve nifu nderinflatio nh as not
reache dt he level to trigge ri llum ination of the
TPMS lo wt ire pressure telltale. Your vehicl eh as also been equipped with a
TPMS malfunctio ni ndicator to indicate if the
system is not operating properly .T he TPMS
malfunctio ni ndicator is combine dw it ht he
lo wt ire pressure telltale .W he nt he system
detects am al function, the warning lamp will
flash for approximately am inute and then
remai nc ontinuously illuminated. This
sequence will be repeated every time the vehi-
cle is started as long as the malfunction
exists.
When the malfunctio ni ndicator is illuminated,
the system ma yn ot be able to detect or signal
lo wt ire pressure as intended. TPMS malfunc-
tions ma yo ccu rf or av ar iety of reasons,
including the installatio nofi ncompatible
replacement or alternate tire sorw heel so n
the vehicl et ha tp revent the TPMS fro mf un c-
tioning properly .A lway sc heck the TPMS mal-
functio nt elltale after replacing one or more
tire sorw heel sony ou rv ehicl etoe nsur et hat
the replacement or alternate tire sa nd wheels
allo wt he TPMS to continue to functio np rop-
erly.
It is the driver's responsibility to set the tire
pressure to tha tr ecommende df or col dt ires
which is suitabl ef or the operating situation
( Y
page 263) .N ote tha tt he correct tire pressure
for the curre nt operating situatio nm u s tf irst be
taught-i ntot he tire pressure monitor. If as ub -
stantia ll os sofp ressure occurs, the warning
threshold for the warning message is aligned to
the taught-i nr eference values. Restart the tire
pressure monitor after adjusting the pressure of
the col dt ire s( Y
page 270). The current pres-
sures ar es av ed as new reference values. As a
result, aw ar ning message will appear if the tire
pressure drops significantly.
The tire pressure monitor does not warn yo uo f
an incorrectly set tire pressure. Observe the
note sont he recommende dt ire pressure
( Y
page 263).
The tire pressure monitor is not able to warn you
of as udde nl os sofp ressure, e.g .ift he tire is
penetrated by af oreign object. In the event of a
sudden loss of pressure, bring the vehicl etoa
halt by braking carefully. Avoi da brup ts teering
movements.268
Tire pressure
Wheel sa nd tires

The tire pressure monitor has ay ellow warning
lamp in the instrument cluster for indicating
pressure loss or am alfunction. Whether the
warning lamp flashes or lights up indicates
whether at ire pressure is too low or the tire
pressure monitor is malfunctioning: R
if the warning lamp is lit continuously, the tire
pressure on one or more tires is significantly
too low. The tire pressure monitor is not mal-
functioning. R
if the warning lamp flashes for approximately
am inute and then remains lit constantly, the
tire pressure monitor is malfunctioning.
In addition to the warning lamp, am essage
appears in the multifunction display .O bserve
the information on display messages
( Y
page 196).
It may take up to ten minutes for am alfunction
of the tire pressure monitor to be indicated. A
malfunction will be indicated by the tire pres-
sure warning lamp flashing for approximately
one minute and then remaining lit. When the
malfunction has been rectified, the tire pressure
warning lamp goes out after af ew minutes of
driving.
The tire pressure values indicated by the on-
board computer may differ from those meas-
ured at ag as station with ap ressure gage. The
tire pressures shown by the on-board computer
refer to those measured at sea level. At high
altitudes, the tire pressure values indicated by a
pressure gage are higher than those shown by
the on-board computer. In this case, do not
reduce the tire pressures.
The operation of the tire pressure monitor can
be affected by interferenc ef rom radio transmit-
ting equipment (e.g. radio headphones, two-way
radios) that may be being operated in or near the
vehicle.
Checking the tire pressur ee lectroni-
cally X
Make sure that the SmartKey is in position H
( Y
page 116) in the ignition lock. X
Press the Y or e button on the steering
wheel to select the Serv. menu.X
Press the c or d button to select
Tire Pressure .X
Press v .
The current tire pressure of each tire is shown
in the multifunction display. If the vehicle has been parked for over
20 minutes, the Tire pressure will be
displayed after driving af ew minutes
message appears.
After at each-in process, the tire pressure mon-
itor automatically detect sn ew wheels or new
sensors. As long as ac lear allocation of the tire
pressure value to the individual wheels is not
possible, the Tire Pressure Monitor Active
display message is shown instead of the tire
pressure display .T he tire pressures are already
being monitored.
If an emergenc ys pare wheel is mounted, the
system may continue to show the tire pressure
of the wheel that has been removed for af ew
minutes. Be aware that the value displayed for
the position where the emergenc ys pare wheel
is fitted is not the same as the current tire pres-
sure of the emergenc ys pare wheel.
Tire pressur em onitor warning mes-
sages The tire pressure monitor detect sap ressure
loss in one or more tires: R
If the tire pressure monitor detect sap ressure
loss in one or more tires, aw arning message
is shown in the multifunction display .T he yel-
low tire pressure warning lamp then lights up. R
If the Please Correct Tire Pressure
message appears in the multifunction display,
the tire pressure in at least one tire is too low.
The tire pressure must be corrected when the
opportunit ya rises. R
If the Check Tires message appears in the
multifunction display ,t he tire pressure in at
least one tire has dropped significantly. The
tires must be checked. R
If the Warning Tire Malfunction message
appears in the multifunction display ,t he tire
pressure in at least one tire has dropped sud-
denly. The tires must be checked.
Observe the instructions and safety notes in the
display messages in the "Tires" section
( Y
page 196).
If the wheel positions on the vehicle are rotated,
the tire pressures may be displayed for the
wrong positions for as hort time. This is rectified
after af ew minutes of driving, and the tire pres-
sures are displayed for the correc tp ositions.Tir ep re ssure 269
Wheels and tires Z

Restarting the tire pressure monitor Whe ny ou restart the tire pressure monitor, all
existing warning messages are deleted and the
warning lamps go out. The monitor uses the cur-
rentl ys et tire pressures as the reference values
for monitoring. In most cases, the tire pressure
monitor will automaticall yd etect the new refer-
ence value sa fte ry ou have changed the tire
pressure. However, yo uc an also set reference
value sm anually as described here. The tire
pressure monitor then monitors the new tire
pressure values. X
Set the tire pressure to the value recommen-
ded for the corresponding driving situation on
the Tire and Loading Information placard on
the driver' ss id eB -pillar ( Y
page 263).
Additiona lt ire pressure value sf or different
load sc an also be found on the tire pressure
table on the inside of the fue lf ille rf lap
( Y
page 263).X
Make sure that the tire pressure is correct on
al lf ou rw he els.X
Ensur et hat the SmartKey is in position H in
the ignition lock. X
Press the Y or e button on the steering
wheel to select the Serv. menu.X
Press the c or d button to select
Tire Pressure .X
Press v .
The multifunction display shows the current
tire pressure for the individual tire sort he
Tire pressure will be displayed
afte rd riving af ew minutes message.X
Press the d button.
The Use Current Pressures as New Ref‐
erence Values message appears in the mul-
tifunction display.
If you wish to confirm the restart: X
Press v .
The Tire Press. Monitor Restarted mes-
sage appears in the multifunction display.
After driving for af ew minutes, the system
checks whethe rt he current tire pressures are
within the specified range. The new tire pres-
sures are then accepted as reference values
and monitored.
If you wish to cance lt he restart:X
Press 8 .
The tire pressure value ss tore datt he last
restart will continu etobem onitored. Radio type approval for the tire pres-
sure monitor Country Radio type approval number
USA FCC ID: MRXMW2433A
FCCIC ID:MRXGG4 Thi sd evice
complies with part 15 of the FCC
rules and with license exempt
RSS standard sofI ndustry Can-
ada. Operation is subject to the
following conditions .( 1) This
device may not cause harmful
interference, and (2) Thi sd evice
mus ta ccept any interference
received, including interference
that may cause undesired oper-
ation. Le present apparei le st
conforme d'industri eC an ada
applicables au xa ppar eils radio
exempts de licence. L'exploita-
tion est authorisee au xd eu xc on-
ditions suivantes. (1) L'appareil
ne doi tp as produire de brouil-
lage, et (2) L'autisatue rdel 'ap-
parei ld oi ta ccepter tou tb rouil-
lage radioelectriqu es ubi, meme
si le brouillag ee st susceptible
d'e nc ompromettre le fonc-
tionnement. WARNING :C ha nges
or modifications not expressly
approved by the party responsi-
bl ef or compliance could voi dt he
user' sa ut hority to operate the
equipment. The term "IC:" before
the radio certification number
only signifies Canad at echnical
specifications were met.
FCC ID:MRXMC34MA4 This
device complies with part 15 of
the FCC rules and with license
exempt RSS standard sofI ndus-
try Canada. Operation is subject
to the following conditions .( 1)
Thi sd evice may not cause harm-
ful interference, and (2) This
device mus ta ccept any interfer-
ence received, inclu ding interfer-
e nce that may cause undesired
operation. Le present appareil
est conforme d'industri eC an ada
applicables au xa ppar eils radio
exempts de licence. L'exploita-
tion est authorisee au xd eu xc on-
ditions suivantes. (1) L'appareil270
Tire pressure
Wheel sa nd tires

Country Radio type approval number
ne doit pas produire de brouil-
lage, et (2) L'autisatuer de l'ap-
pareil doit accepter tout brouil-
lage radioelectrique subi, meme
si le brouillage est susceptible
d'en compromettre le fonc-
tionnement. WARNING: Changes
or modifications not expressly
approved by th ep art yr esponsi-
ble for compliance could void the
user' sa uthorit yt oo perate the
equipment .T he ter m" IC: "b efore
th er adio certification number
onl ys ignifies Canada technical
specifications were met.
Canada IC: 2546A-MW2433A
IC:2546A-GG4 This devic ec om-
plies with part 15 of th eF CC
rules and with licens ee xempt
RSS standards of Industry Can-
ada. Operatio niss ubject to the
following conditions. (1) This
devic em ay not cause harmful
interference, and (2) This device
must accept any interference
received ,i ncludin gi nterference
that may cause undesire do per-
ation. Le present appareil est
conforme d'industrie Canada
applicables aux appareils radio
exempt sdel icence. L'exploita-
tio ne st authorisee aux deux con-
dition ss uivantes .( 1) L'appareil
ne doit pas produire de brouil-
lage, et (2) L'autisatuer de l'ap-
pareil doit accepter tout brouil-
lage radioelectrique subi, meme
si le brouillage est susceptible
d'en compromettre le fonc-
tionnement. WARNING: Changes
or modifications not expressly
approved by th ep art yr esponsi-
ble for compliance could void the
user' sa uthorit yt oo perate the
equipment .T he ter m" IC: "b efore
th er adio certification number
onl ys ignifies Canada technical
specifications were met.
IC: 2546A-MC34MA4 Loading th ev ehicle
Instruction labels for tires and loads
G WARNING
Overloade dt ires can overheat ,c ausing a
blowout .O verloade dt ires can also impair the
steerin ga nd driving characteristic sa nd lead
to brak ef ailure. Ther eisar isk of accident.
Observe th el oad rating of th et ires. The load
rating must be at least half of th eG AWR of
your vehicle .N ever overload th et ires by
exceedin gt he maximum load.
Two instruction labels on your vehicle show the
maximum possible load.
(1) The Tire and Loadin gI nf ormation placar di s
on th eB -p illar on th ed river' ss ide. The Tire
and Loadin gI nf ormation placar ds hows the
maximum permissible number of occu-
pant sa nd th em aximum permissible vehicle
load. It also contain sd etails of th et ir es izes
and corresponding pressures for tires
mounted at th ef actory.
(2) The vehicle identification plat eisont he
B-pillar on th ed river' ss ide. The vehicle
identification plat ei nform sy ou of th eg ross
vehicle weight rating .Itism ade up of the
vehicle weight ,a ll vehicle occupants, the
fuel and th ec argo. You can also fin di nfor-
mation about th em aximum gross axle
weight rating on th ef ront and rear axle.
The maximum gross axle weight rating is
th em aximum weight that can be carried by
one axle (front or rear axle) .N ever exceed
th em aximum load or th em aximum gross
axle weight rating for th ef ront or rear axle.
C
B-pillar ,d river' ss ideLoading th ev ehicle 271
Wheels and tires Z

Maximum permissible gross vehicle
weight rating X
Specification for maximu mg ross vehicle
weight C is listed in the Tire and Loading
Informatio np lacard: "The combined weight of
occupants and cargo should never exceed
XXX kilograms or XXX lbs."
The gross weight of all vehicl eo ccupants, load
and luggage must not exceed the specified
value.
i The specifications show nont he Tire and
Loading Informatio np lacard in the illustration
are examples. The maximu mp ermissible
gross vehicl ew eight rating is vehicle-specific
and may diffe rf rom that in the illustration.
You can find the vali dm aximu mp ermissible
gross vehicl ew eight rating for you rv ehicl eo n
the Tire and Loading Informatio np lacard.
Number of seats
Maximu mn umber of seats C indicates the
maximu mn umber of occupants allowe dt o
travel in the vehicle. This information can be
found on the Tire and Loading Informatio np lac-
ard. i The specifications show nont he Tire and
Loading Informatio np lacard in the illustration
are examples. The number of seats is vehicle-
specific and can diffe rf rom the details shown.
The number of seats in you rv ehicl ec an be
found on the Tire and Loading Information
placard.
Determinin gt he correct load limit
Step-by-ste pi nstructionsThe following steps have been developed as
required of all manufacturers under Title 49,
Cod eofU .S. Federa lR egulations, Part 575 pur-
suant to the "National Traffi ca nd Motor Vehicle
Safety Act of 1966". X
Step 1: Locate the statement "The combined
weight of occupants and cargo should never
exceed XXX kg or XXX lbs." on you rv ehicle’s
Tire and Loading Informatio np lacard.X
Step 2: Determine the combined weight of
the drive ra nd passengers that wil lber iding in
you rv ehicle. X
Step 3: Subtract the combined weight of the
drive ra nd passengers from XXX kilograms or
XXX lbs. X
Step 4: The resulting figure equals the avail-
abl ea mount of cargo and luggage loa dc apa-
city. For example, if the "XXX "a mount equals
1400 lbs and there wil lbef ive 150-lb pas-
sengers in you rv ehicle, the amount of avail-
abl ec argo and luggage loa dc apacity is
650 lbs (1400 -7 50 (5 x1 50) = 6 50 lbs).X
Step 5: Determine the combined weight of
luggage and cargo being loaded on the vehi-
cle. That weight may not safel ye xceed the
available cargo and luggage loa dc apacity cal-
culated in step 4.
Example :s teps 1to3The following table show se xamples on how to
calculate total and cargo loa dc apacities with
varying seating configurations and number and
size of occupants. The following examples use a
loa dl imi tof1 500 lbs (680 kg). This is for illus-
tration purposes only. Make sure you are
using the actua ll oa dl imi tf or you rv ehicl es tated
on you rv ehicle's Tire and Loading Information
placard ( Y
pag e2 71).272
Loading the vehicle
Wheels and tires

Quality grades can be found ,w here applicable,
on the tire sidewall between tread shoulde ra nd
maximum sectio nw id th.
Example: R
Treadwear grade: 200R
Tractio ng rade: AAR
Temperature grade: A
All passenge rc ar tires must conform to the stat-
utory safety requirements in additio ntot hese
grades.
i The actua lv alues for tires are vehicle-spe-
cific and may deviate from the values in the
illustration.
Treadwear The treadwea rg rad eisac omparativ er ating
based on the wea rr ate of the tire whe nt ested
unde rc ontrolled conditions on as pecified U.S.
government course. For example, at ire graded
150 would wea ro ne and one-half times as well
on the government test track as at ire graded
100.
The relative performance of tires depends upon
the actua lc onditions of their use ,h owever, and
may depart significantly from the norm du et o
variations in driving habits, service practices
and differences in road characteristics and cli-
mate.
Traction
G WARNING
The tractio ng rad ea ssigne dtot his tire is
based on straight-ahead braking traction
tests, and doe sn ot include acceleration, cor-
nering, hydroplaning ,orp ea kt ractio nc har-
acteristics.
! Avoid wheelspin. Thi sc an lea dtod amage to
the driv et rain.
The tractio ng rades –f rom highest to lowest –
are AA, A, Ba nd C. Thos eg rades represent the
tire's ability to stop on wet pavement as meas-
ure du nde rc ontrolled conditions on specified
government test surfaces of asphal ta nd con-
crete. At ire marked Cm ay have poo rt raction
performance.
The safe spee donaw et, snow covere dori cy
road is always lower than on dry road surfaces. You should pay specia la ttentio ntor oa dc ondi-
tions whe nt emperatures are around freezing
point.
Mercedes-Benz recommends am inimum tread
depth of

Speed rating The speed rating is part of the tire identification.
It specifies the speed range for which the tire is
approved.
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 af ully loaded vehicle (the weight of the
vehicle including all accessories, occupants,
fuel, luggage and the drawbar noseweight, if
applicable). The gross vehicle weight rating is
specified on the vehicle identification plate on
the B-pillar on the driver's side.
Maximu ml oaded vehicle weightThe maximum weight is the sum of: R
the curb weight of the vehicle R
the weight of the accessories R
the load limit R
the weight of the factory installed optional
equipment
Kilopascal (kPa) Metric unit for tire pressure. 6.9 kPa corre-
sponds to 1p si. Another unit for tire pressure is
bar. 100 kilopascals (kPa) are the equivalent of
1b ar.
Load index
In addition to the load-bearing index, the load
index may also be imprinted on the sidewal lo f
the tire. This specifies the load-bearing capacity
more precisely.
Curb weight
The weight of av ehicle with standard equipment
including the maximum capacity of fuel, oil and
coolant. It also includes the air-conditioning sys-
tem and optional equipment if these are instal-
led in the vehicle, but does not include passen-
gers or luggage. Maximu ml oad ratingThe maximum load rating is the maximum per-
missible weight in kilograms or lbs for which a
tire is approved.
Maximu mp ermissible tire pressureMaximum permissible tire pressure for one tire.
Maximu ml oad on one tireMaximum load on one tire. This is calculated by
dividing the maximum axle load of one axle by
two.
PSI (pounds per squar ei nch)As tandard 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: R
if the vehicle has been parked with the tires
out of direct sunlight for at least three hours
and R
if 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.All about wheel sa nd tires 279
Wheels and tires Z

An arrow on the sidewall of the tire indicates its
correct direction of rotation.
Storin gw heelsStore wheels tha ta re not being used in ac ool,
dry and preferably dark place .P rotect the tires
from oil, grease, gasoline and diesel.
Mounting aw heel
Preparin gt he vehicleX
Stop the vehicl eons olid ,n on-slippery and
level ground. X
Apply the electri cp ar king brake manually.X
Bring the front wheels into the straight-ahead
position. X
Shift the transmission to position ] .X
Switch off the engine. X
Vehicles withou tK EYLESS -GO: remove the
SmartKe yf rom the ignition lock.X
Vehicles with KEYLESS-GO: open the driv-
er' sd oo r.
The vehicl ee le ctronics now have status 0 .
Thi sist he same as the SmartKe yh av ing been
removed. X
Vehicles with KEYLESS-GO: remove the
Start/Stop button from the ignition lock
( Y
page 116). X
If included in the vehicl ee quipment ,r emove
the tire-change tool kit from the vehicle. X
Safeguar dt he vehicl ea gain st rolling away.
i Due to difference sinv ehicl ee quipment ,n ot
al lv ehicles ar ee quippe dw it hat ire-change
tool kit. For informatio nonw hi ch tool sa re
required to perfor maw heel change on your
vehicle, consult an authorize dM ercedes-
Benz Center.
Necessary tire-changing tool sc an include, for
example: R
Jack R
Wheel chock R
Lu gw rench Securin gt he vehicle to preven titf rom
rolling away
If your vehicl eise quippe dw it haw heel chock, it
can be found in the tire-change tool kit
( Y
page 245).
The folding whee lc hoc ki sana ddit ional safety
measure to prevent the vehicl ef rom rolling
away ,f or exampl ew he nc hanging aw heel .X
Fol db ot hp la te su pwar ds C .X
Fol do ut lowe rp la te D .X
Guid et he lugs on the lowe rp la te full yi nto the
openings in base plate