2018 MERCEDES-BENZ SL CLASS tire pressure

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

An electronic speed limite rp revents your vehi-
cle from exceeding as peed of 130 mph
(21 0k m/h).
The speed rating of tire sm ounted at the factory
ma ybeh ig he rt ha nt he maximu ms peed tha tt he
electronic speed limite rp er mits.
Make sure tha ty ou rt ire sh av et he required
speed rating ,e .g .w he nb uyin gn ew tires. The
required speed rating for your vehicl ec an be
found in the "tires "s ectio n( Y
page 284).
Further informatio na bout reading tire data can
be obtained from any qualified specialist work-
shop.
Load index
In additio ntot he load-bearing index, load
index C ma ya ls obei mprinte dont he sidewall
of the tire .Y ou will find thi sa fte rt he letter that
identifie st he speed rating ( Y
page 275).R
If no specification is given: no text (a sint he
exampl ea bo ve), represents as tandard load
(SL) tire R
XL or Extra Load: represents ar einforced tireR
Light Load: represents al ig ht load tireR
C, D, E: represents al oa dr an ge tha td epen ds
on the maximu ml oa dt ha tt he tire can carry at
ac ertain pressure
i Tire data is vehicle-specific and ma yd ev iate
from the data in the example. Maximum load rating
Maximu mt ire load C is the maximu mp er mis-
sibl ew eigh tf or which the tire is approved.
Do not overload the tire sbye xceeding the
specified load limit. The maximu mp er missible
load can be found on the vehicle's Tire and
Loading Informatio np la card on the B-pillar on
the driver's side ( Y
page 271).
i The actual values for tire sa re vehicle-spe-
cifi ca nd ma yd ev iate from the values in the
illustration.
DOT, Tire Identificatio nN umbe r( TIN)US tire regulations stipulate tha te very tire man-
ufacturer or retreader must imprint aT IN in or on
the sidewall of each tire produced.
The TIN is au niqu ei de ntificatio nn umber. The
TIN enables the tire manufacturer sorr etreaders
to inform purchaser sofr ecall sa nd othe rs af ety-
relevant matters .Itm ak es it possibl ef or the
purchaser to easily identify the affecte dt ires.
The TIN is made up of manufacturer identifica-
tio nc ode D ,t ire size

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

These tires have been specially adapted for
use with the control systems, such as ABS or
ESP ®
,a nd are marked as follows:R
MO = M ercedes-Benz OriginalR
MOE = M ercedes-Benz Original Extended
(tires featuring run-flat characteristics) R
MO1 = M ercedes-Benz Original (only cer-
tain AMG tires)
Mercedes-Benz Original Extended tires may
only be used on wheels that have been spe-
cifically approved by Mercedes-Benz.
Only use tires, wheels or accessories tested
and approved by Mercedes-Benz .C ertain
characteristics, e.g. handling, vehicle noise
emissions or fuel consumption, may other-
wise be adversely affected. In addition, when
driving with al oad, tire dimension variations
could cause the tires to come into contact
with the bodywork and axle components .T his
could result in damage to the tires or the vehi-
cle.
Mercedes-Benz accepts no liability for dam-
age resulting from the use of tires, wheels or
accessories other than those tested and
approved.
Information on tires, wheels and approved
combinations can be obtained from any quali-
fied specialist workshop.
! Retreaded tires are neither tested nor rec-
ommended by Mercedes-Benz ,s ince previ-
ous damage cannot alway sbed etected on
retreaded tires. As ar esult, Mercedes-Benz
cannot guarantee vehicle safety if retreaded
tires are mounted. Do not mount used tires if
you have no information about their previous
usage.
The recommended pressures for various oper-
ating conditions can be found: R
on the Tire and Loading Information placard
on the B-pillar on the driver's side R
in the tire pressure table on the fuel filler flap
Observe the notes on recommended tire pres-
sures under various operating conditions
( Y
page 263).
Check tire pressures regularly, and only when
the tires are cold. Comply with the maintenance
recommendations of the tire manufacturer in
the vehicle document wallet. Notes on the vehicle equipment –a lway se quip
the vehicle: R
with tires of the same size on ag iven axle (left
and right) R
with the same type of tires at ag iven time
(summer tires, winter tires, MOExtended
tires)
Exception: it is permissible to mount ad iffer-
ent type or make in the event of af lat tire.
Observe t he
"MOExtended tires (tires with
run-flat characteristics)" section
( Y
page 247).
Vehicles equipped with MOExtended tires are
not equipped with aT IREFIT kit at the factory. It
is therefor er ecommended that you additionally
equip your vehicle with aT IREFIT kit if you mount
tires that do not feature run-flat characteristics,
e.g. winter tires. AT IREFIT kit may be obtained
from aq ualified specialist workshop.
Emergency spar ew heel
Important safety notes
G WARNING
The wheel or tire size as well as the tire type of
the spare wheel or emergenc ys pare wheel
and the wheel to be replaced may differ.
Mountin gane mergenc ys pare wheel may
severely impair the driving characteristics.
There is ar isk of an accident.
To avoid hazardous situations: R
adapt your driving style accordingly and
drive carefully. R
never mount more than one spare wheel or
emergenc ys pare wheel that differs in size. R
only use as pare wheel or emergenc ys pare
wheel of ad ifferent size briefly. R
do not switch ESP ®
off.R
have as pare wheel or emergenc ys pare
wheel of ad ifferent size replaced at the
nearest qualified specialist workshop.
Observe that the wheel and tire dimensions
as well as the tire type must be correct.
When using an emergenc ys pare wheel or spare
wheel of ad ifferent size, you must not exceed
the maximum speed of 50 mph (80 km/h).Emergency spar ew heel 285
Wheels and tires Z

Snow chains mus tn ot be mounted on emer-
gency spare wheels.
General notes You can as kf or information regarding permitted
emergency spare wheel satana ut horized
Mercedes-Benz Center.
You shoul dr egularl yc heck the pressure of the
emergency spare wheel ,p ar ticularly prior to
long trips, and correct the pressure as neces-
sary ( Y
page 263). The value on the wheel is
valid.
An emergency spare wheel may also be moun-
ted against the direction of rotation. Observe
the time restriction on us easw el last he speed
limitation specified on the emergency spare
wheel.
Replace the tire sa fte rs ix years at the latest,
regardless of wear. Thi sa ls oa pplies to the
emergency spare wheel.
Whe ny ou are driving with the collapsibl es pare
wheel mounted, the tire pressure loss warning
system or the tire pressure monitor canno tf unc-
tion reliably. Only restart the tire pressure loss
warning system or tire pressure monitor when
the defectiv ew he el ha sb ee nr eplaced with a
new wheel.
Vehicles with tire pressure monitor: after
mounting an emergency spare wheel ,t he sys-
tem may stil ld is play the tire pressure of the
removed wheel for af ew minutes. The value dis-
played for the mounted emergency spare wheel
is not the same as the current tire pressure of
the emergency spare wheel.
Removin gt he emergenc ys pare wheel
Vehicles with ac olla psibl es pare wheelThe collapsibl es pare wheel can be found in the
stowag ew el lu nder the trunk floor ( Y
page 221). X
Turn retaining screw D counter-clockwise
and remove it. X
Remove collapsibl es pare wheel C .
Alway so bserve the instructions and safety
notes in the "Mounting aw he el "s ection
( Y
page 281).
Stowin gt he emergenc ys pare wheel
! Only place the collapsibl es pare wheel in the
vehicl ew he nitisd ry .O therwise, moisture
may get into the vehicle.
Take the following step stos tow au se dc ollaps-
ible spare wheel .O therwise, the collapsible
spare wheel will not fit in the trunk in the inten-
ded manner. Mercedes-Benz recommend st hat
yo uh av et his work carrie do ut at aq uali fied
specialist workshop. X
Unscre wt he valve cap from the valve. X
If possible ,u nscrew the valve insert from the
valve and release the air.
Fully deflating the tire sc an take af ew
minutes. X
Screw the valve insert back into the valve. X
Screw the valve cap back on. X
Pull the protectiv es heet provided with the
spare wheel ove rt he collapsibl es pare wheel.X
Stow the collapsibl es pare wheel in the emer-
gency spare wheel well under the trunk. X
Use the retaining scre wtop ie rce the protec-
tive sheet and fasten the collapsibl es pare
wheel in place.
Inflating the collapsibl es pare wheel
! Inflate the collapsibl es pare wheel using the
tire inflation compressor before lowering the286
Emergenc ys pare wheel
Wheels and tires