MERCEDES-BENZ SL CLASS 2018 Owners Manual

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

The greater the combined weight of the occu-
pants, the lower the maximum luggage load.
Step 1
Example 1 Example 2
Combined max-
imum weight of
occupants and
cargo (data
from the Tire
and Loading
Information
placard) 1500 lbs
(680 kg) 1500 lbs
(680 kg)
Step 2
Example 1 Example 2
Number of peo-
ple in the vehi-
cle (driver and
occupants) 1 2
Weight of the
occupants Occu-
pant 1:
175 lbs
(80 kg) Occu-
pant 1:
175 lbs
(80 kg)
Occu-
pant 2:
195 lbs
(88 kg)
Gross weight
of all occupants 175 lbs
(80 kg) 370 lbs
(168 kg)
Step 3
Example 1 Example 2
Permissible
load (maxi-
mum gross
vehicle weight
rating from the
Tire and Load-
ing Information
placar dm inus
the gross
weight of all
occupants) 1500 lbs
(680 kg)

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

Tire labeling
Overview
C
Unifor mT ir eQ ualit yG radin gS tandard
( Y
page 278)D
DOT, Tire Identification Number
( Y
page 277)

description, dependin gont he manufacturer
(e.g. 245/40 ZR 18).
Rim diameter: rim diameter

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

requirements of the U.S. Department of Trans-
portation.
Manufacturer identificatio nc ode: manufac-
turer identification code D provides details on
the tire manufacturer. New tires have ac ode
with two symbols. Retreaded tires have ac ode
with four symbols.
For further informatio na bout retreaded tires,
see ( Y
pag e2 84).
Tire size: identifier