lock MERCEDES-BENZ SL CLASS 2018 Repair Manual

Display messages
Possible causes/consequences and P Solutions
Y Open/Clos eV ario-
Roo fC ompletel y The roo fisn ot locked.X
Pull ove ra nd stop th ev ehicl es afely as soo nasp ossible, payin g
attention to roa da nd traffic conditions.X
Push or pull and hold th er oo fs witch until th er oo fisf ull yo pen or
closed ( Y
page 78) .
Y Start Engine See
Operator' sM anual The on-boar dv oltag eist oo low.X
Start th ee ng ine.X
Afte ra pproximately te ns econds, repeat th eo pening or closin g
procedure ( Y
page 78).
The roo fh as been opened and closed several times in ar ow .T he roo f
drive has been switched off automatically for safet yr easons.
You can open and close th er oo fa gain after approximately te n
minutes. X
Switc ho ff th ei gnition and tur nitb ac ko n.X
Repeat th eo pening or closin gp rocedure ( Y
page 78).
Close Rea r Sid e Win ‐
dow s You leav et he vehicl ea nd at least on er ear side window is open .X
Clos et he side windows ( Y
page 75).

Safety systems Warning/
indicator
lamp Q Signal type
Possible causes/consequences and P Solutions
'M
Q ' (USA only) or M (Canada only): the red brake system warning lamp is
lit while the engine is running. Aw arning tone also sounds.
G WARNING
There is not enough brake fluid in the brake fluid reservoir.
The braking effect may be impaired.
There is ar isk of an accident.X
Pull over and stop the vehicle safely as soon as possible, paying attention to road
and traffic conditions. Do not continue driving under any circumstances. X
Secure the vehicle against rolling away ( Y
page 131).X
Do not add brake fluid. Adding more will not correct the malfunction. X
Consult aq ualified specialist workshop.X
Observe the additional display messages in the multifunction display.
'
Q USA only: the red brake system warning lamp is lit while the engine is running.
The multifunction display also shows ad isplay message with the & symbol.
The brake pads/linings have reached their wear limit. X
Visit aq ualified specialist workshop.
%
Q The yellow ABS warning lamp is lit while the engine is running.
ABS (anti-lock braking system) is malfunctioning.
If there is an additional warning tone, the EBD (electronic brake force distribution)
is malfunctioning.
Other driving systems and driving safety systems may also malfunction.
G WARNING
The brake system continues to function normally, but without the functions listed
above. The front and rear wheels could therefore lock if you brake hard, for exam-
ple.
The steerability and braking characteristics may be severely affected. The braking
distance in an emergency braking situation can increase.
If ESP ®
is not operational, ESP ®
is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident. X
Observe the additional display messages in the multifunction display. X
Drive on carefully. X
Visit aq ualified specialist workshop immediately.
If the ABS control unit is faulty, there is also ap ossibility that other systems, such
as the navigation system or the automatic transmission, will not be available.204
Warning and indicator lamps
On-board computer and displays

Stowage areas
Stowage spaces
Important safety notes
G WARNING
If object sint he passenger compartmen ta re
stowed incorrectly, they can slide or be
thrown around and hit vehicle occupants. In
addition, cup holders, open stowage spaces
and mobile phone brackets cannot always
retain all object st hey contain. There is ar isk
of injury, particularly in the event of sudden
braking or as udden change in direction.R
Always stow object ssot hat they cannot be
thrown around in such situations. R
Always make sure that object sdon ot pro-
trude from stowage spaces, parcel nets or
stowage nets. R
Close the lockable stowage spaces before
startin gaj ourney.R
Always stow and secure heavy, hard, poin-
ted, sharp-edged, fragile or bulky object si n
the trunk.
Glove box
X
To open: pull handle C and open glove box
flap D .X
To close: fold glove box flap D up until it
engages.
The glove box flap contains brackets for coins,
pens, and credit and service cards. The glove box can be locked and unlocked using
the mechanical key. X
To lock: insert the mechanical key into the
lock and turn it to position H .X
To unlock: insert the mechanical key into the
lock and turn it to position G .
Stowage compartment/telephone
compartment under the armrest
X
To open: push button C up and raise arm-
rest D .
The stowage compartmen tc an be locked and
unlocked centrally using the SmartKey
( Y
page 65).
i Depending on the vehicle equipment, aU SB
port and aM edia Interface is installed in the
stowage compartment. AM edia Interface is a
universal interface for mobile audio equip-
ment ,e .g. for an iPod ®
or MP3 Playe r.Stowage areas 219
Stowage and features Z

X
Press MB Info call button C .
This initiates ac all to the Mercedes-Benz Cus-
tomer Assistance Center.
The indicator lamp in MB Info call button C
flashes while the connection is being made.
The multifunction display shows the Con‐
necting Call message. The audio system is
muted.
If ac onnection can be made, the Call Con‐
nected message appears in the multifunction
display.
If am obile phone networ ka nd GPS reception
are available, the system transfers data to the
Mercedes-Benz Customer Assistance Center,
for example: R
curren tl ocation of the vehicleR
vehicle identification number
i The display of the multimedia system indi-
cates that ac all is active. During the call, you
can change to the navigation menu by press-
ing the NAVI button on COMAND ,f or exam-
ple.
Voice output is not available.
Av oice connection is established between the
Mercedes-Benz Customer Assistance Center
and the vehicle occupants.
You receive information about operating your
vehicle, about the nearest authorized
Mercedes-Benz Center and about other prod-
ucts and services from Mercedes-Benz.
USA only: you can find further information on
the mbrace system under "Owners Online" at
http://www.mbusa.com.
i The system has not been able to initiate an
MB Info call, if: R
the indicator lamp in MB Info call button C
is flashing continuously. R
no voice connection to the Mercedes-Benz
Customer Assistance Center was estab-
lished.
This can occur if the relevant mobile phone
networ kisn ot available, for example.
The Call Failed message appears in the
multifunction display. X
To end ac all: press the v button on the
multifunction steerin gw heel.
or X
Press the corresponding multimedia system
button for ending ap hone call. Call priority When service calls are active, e.g. Roadside
Assistance or MB Info calls, an emergenc yc all
can still be initiated. In this case, an emergency
call will take priority and override all other active
calls.
The indicator lamp of the respective button
flashes until the call is ended.
An emergenc yc all can only be terminated by the
Mercedes-Benz Customer Assistance Center.
All other calls can be ended by pressing: R
the v button on the multifunction steering
wheel R
the corresponding button on the audio sys-
tem or on COMAND for ending at elephone
call
i When ac all is initiated, the audio system is
muted. The mobile phone is no longer con-
nected to COMAND .H owever, if you want to
use your mobile phone, do so only when the
vehicle is stationary and in as afe location.
Vehicle Health Check With the Vehicle Health Check, the Customer
Assistance Center can provide improved sup-
port for problems with your vehicle. During an
existin gc all, vehicle data is transferred to the
Customer Assistance Center. The customer ser-
vice representative can use the received data to
decide what kind of assistanc eisr equired. You
are then ,f or example, guided to the nearest
Mercedes-Benz Servic eC enter or ar ecovery
vehicle is called.
If vehicle data needs to be transferred during an
MB Info call or aR oadside Assistance call, this is
initiated by the Customer Assistance Center.
You will see the Roadside Assistance Con‐
nected message in the COMAND display. If the
vehicle remot em alfunction diagnosis can be
started, the Request for vehicle diagno‐
sis received. Start vehicle diagnosis?
message appears in the display. X
Confirm the message with Yes .X
When the Vehicle diagnosis: Please
start ignition message appears, turn the
SmartKey to position H in the ignition lock
( Y
page 116). X
When the Please follow the instruc‐
tions received by phone and move
your vehicle to as afe position mes-Features 227
Stowage and features Z

Engine compartment
Hood
Important safety notes
G WARNING
If th eh ood is unlatched, it may open up when
th ev ehicle is in motion and bloc ky our view.
Ther eisar isk of an accident.
Never unlatch th eh ood while driving .B efore
ever yt ri p, ensure that th eh ood is locked.
G WARNING
When opening and closin gt he hood ,itm ay
suddenly fall int ot he closed position .T her ei s
ar isk of injury to person sw ithin range of
movemen toft he hood.
Open and close th eh ood only when no on ei s
within its range of movement.
G WARNING
Opening th eh ood when th ee ngine is over-
heated or when there is af ir eint he engine
compartmen tc oul de xpose you to hot gases
or other servic ep roducts. Ther eisar isk of
injury.
Let an overheate de ngine coo ld own before
opening th eh ood .Ift he re is af ir eint he
engine compartment, keep th eh ood closed
and contac tt he fir ed epartment.
G WARNING
The engine compartmen tc ontain sm oving
components. Certain components, suc ha s
th er adiator fan ,m ay continue to run or start
again suddenly when th ei gnition is off .T here
is ar isk of injury.
If you nee dtodoa ny work inside th ee ngine
compartment: R
switch off th ei gnitionR
never reac hi nt ot he area wher et he re is a
risk of danger from moving components,
suc hast he fan rotatio na rea R
remove jewelry and watches R
keep items of clothing and hair, for exam-
ple, away from moving parts
Opening th eh ood
G WARNING
Certain component sint he engine compart-
ment, suc hast he engine ,r adiator and parts
of th ee xhaust system, can become ver yh ot.
Workin gint he engine compartmen tp ose sa
risk of injury.
Wher ep ossible, let th ee ngine coo ld own and
touch only th ec omponent sd escribe dint he
following.
G WARNING
When th eh ood is open and th ew indshield
wiper sa re set in motion ,y ou can be injured by
th ew iper linkage. Ther eisar isk of injury.
Always switch off th ew indshield wiper sa nd
th ei gnition before opening th eh ood.
! Mak es ure that th ew indshield wiper sa re
no tf olded away from th ew indshield. You
coul do th erwise damag et he windshield wip-
ers or th eh ood.
X
Mak es ure that th ew indshield wiper sa re
turned off. X
Pull release lever C on th eh ood.
The hood is released.Engine compartment 233
Maintenance and care Z

Workin gint he engine compartment poses a
risk of injury.
Where possible, let the engine cool down and
touch only the component sd escribed in the
following.
G WARNING
The cooling system is pressurized, particularly
when the motor is warm. If you open the cap,
you could be scalded if hot coolant sprays out.
There is ar isk of injury.
Let the engine cool down before you open the
cap. Wear gloves and eye protection. Slowly
open the cap to relieve pressure.
Example X
Park the vehicle on al evel surface.
Only check the coolant level when the vehicle
is on al evel surface and the engine has cooled
down. X
Turn the SmartKey to position H in the igni-
tion lock ( Y
page 116).
On vehicles with KEYLESS-GO, press the
Start/Stop button twice ( Y
page 116).X
Check the coolant temperature gage in the
multifunction display.
The coolant temperature must be below
158 ‡( 70 †).X
Turn the SmartKey to position

! Lock the car if you wash it in an automatic
car wash. Otherwise, the vehicle might be
damaged.
! Never clean your vehicle in aT ouchless
Automatic Car Wash as these use special
cleaning agents. These cleaning agents can
damage the paintwork or plastic parts.
If you have your vehicle cleaned in ah igh-
pressure automatic car wash, small amounts
of water may enter the vehicle.
! Make sure that the automatic transmission
is in position N when washing your vehicle in
at ow-through car wash. The vehicle could be
damage dift he transmission is in another
position.
! Make sure that: R
the side windows and the roof are com-
pletely closed R
the climate control blower is switched off R
the windshiel dw iper switch is at position 0
The vehicle could otherwise be damaged.
You can clean the vehicle at an automatic car
wash from the very start.
Preferably clean the vehicle at automatic car
washes that use textile washing elements with-
out brushes. This prevents fine scratches from
forming on the paintwork and film.
If the vehicle is very dirty, pre-wash it before
cleaning it in an automatic car wash.
After using an automatic car wash, wipe off wax
from the windshiel da nd the wiper blades. This
will prevent smears and reduce wiping noises
caused by residue on the windshield.
i Vehicles with decorative film: select aw ash
program without hot wax at the automatic car
wash.
Washing by hand In some countries, washing by hand is only
allowed at speciall ye quipped washing bays.
Observe the legal requirements in each country. X
Do not use hot water and do not wash the
vehicle in direct sunlight. X
Use as oft sponge to clean.X
Use am ild cleaning agent, such as ac ar
shampoo approved by Mercedes-Benz. X
Thoroughly hose down the vehicle with ag en-
tle jet of water. X
Do not point the water jet directly towards the
air inlet or the edges of decorative foils. X
Use plenty of water and rinse out the sponge
frequently. X
Rinse the vehicle with clean water and dry
thoroughly with ac hamois.X
Do not let the cleaning agent dry on the paint-
work or the decorative foils.
Carefully remove all deposits of road salt as
soon as possible when driving in winter.
Powe rw ashers
G WARNING
The water jet from ac ircular jet nozzle (dirt
blasters) can cause invisible exterior damage
to the tires or chassis components. Compo-
nent sd amage dint his way may fail unexpect-
edly .T here is ar isk of an accident.
Do not use power washers with circular jet
nozzles to clean the vehicle. Have damaged
tires or chassis component sr eplaced imme-
diately.
! Vehicles with decorative foil: parts of your
vehicle are covered with decorative foil. Main-
tain ad istance of at least 27.5 in (70 cm)
between the foil-wrappe dp arts of the vehicle
and the nozzle of the high pressure cleaner.
Information abou tt he correct distance is
available from the equipment manufacturer.
Move the power washer nozzle around when
cleaning your vehicle.
The water temperature of the high-pressure
cleaner must not exceed 140 °F (60 °C).
! Alway sm aintain ad istance of at least
11.8 in (30 cm) between the vehicle and the
power washer nozzle. Information abou tt he
correct distance is available from the equip-
ment manufacturer.
Move the power washer nozzle around when
cleaning your vehicle.
Do not aim directly at any of the following: R
tires R
door gaps, roof gaps, joints, etc. R
electrical components R
battery R
plug-type couplings R
lights Care 239
Maintenance and care Z

H Environmenta ln ote
Hav et he used tir es ealan tb ottle disposed of
professionally, e.g .ataq ualifie ds pecialist
workshop.
If tir ep ressure of 20 0k Pa (2.0 ba r/ 29 psi )h as
bee na chieved after am aximu mp eriod of ten
minutes: X
Switch off the tire inflation compressor. X
Unscrew the filler hose from the valve of the
faulty tire. X
Stow the tire sealant bottle and the tire infla-
tion compressor. X
Pull away immediately .X
Stop after driving for approximately ten
minutes and check the tire pressure with the
tire inflation compressor.
The tire pressure must now be at least
130 kPa (1.3 bar/19 psi).
G WARNING
If the required tire pressure is not reached
after driving for as hort period, the tire is too
badly damaged. The tire sealant cannot repair
the tire in this instance. Damaged tires and a
tire pressure that is too low can significantly
impair the vehicle's braking and driving char-
acteristics. There is ar isk of accident.
Do not continue driving. Contact aq ualified
specialist workshop.
i In cases such as the one mentioned above,
contact an authorized Mercedes-Benz Cen-
ter. Or call 1-800-FOR-MERCede s( in the
USA) or 1-800-387-0100 (in Canada). X
Correct the tire pressure if it is still at least
130 kPa (1.3 bar/19 psi) .S ee the Tire and
Loading Information placard on the driver's
side B-pillar or the tire pressure tabl eint he
fuel filler fla pf or values.X
To increase the tire pressure: switch on the
tire inflation compressor. X
To reduce the tire pressure: depress pres-
sure release button C next to pressure
gauge D . X
When the tire pressure is correct, unscrew the
filler hose from the valve of the sealed tire. X
Screw the valve cap onto the tire valve of the
sealed tire.
X
To remove the tire sealant bottle from the tire
inflation compressor, press together the lock-
ing tabs on the yellow cap. X
Pul lt he tire sealant bottle out of the tire infla-
tion compressor.
The filler hose remains attache dtot he tire
sealant bottle. X
Drive to the nearest qualified specialist work-
shop and have the tire change dt here.X
Have the tire sealant bottle and the filler hose
replaced as soon as possibl eataq ualified
specialist workshop. X
Have the tire sealant bottle replaced every
four years at aq ualified specialist workshop.250
Flat tire
Breakdow na ssistance

Battery (vehicle)
Important safety notes Specia lt ool sa nd expert knowledg ea re required
when working on the battery ,e .g .r emova la nd
installation. Yo us houl dt herefore have al lw or k
involving the battery carrie do ut at aq uali fied
specialist workshop.
G WARNING
Wor kc arrie do ut incorrectly on the battery
can lead ,f or example, to as hort circui ta nd
thu sd amag et he vehicl ee le ctronics .T hi sc an
lead to functio nr estrictions applying to
safety-relevant systems, e.g .t he lighting sys-
tem, the ABS (anti-lock braking system )ort he
ESP ®
(Electronic Stability Program). The oper-
ating safety of your vehicl em ay be restricted.
Yo uc ould lose contro loft he vehicle, for
example: R
when braking R
in the event of abrupt steering maneuvers
and/or when the vehicle's speed is not
adapted to the roa dc onditions
There is ar is kofana ccident.
In the event of as hort circui tora similar inci-
dent, contact aq uali fied specialist workshop
immediately. Do not drive any further .Y ou
shoul dh av ea ll work involving the battery car-
rie do ut at aq uali fied specialist workshop.
For further informatio na bout ABS and ESP ®
,
see ( Y
page 57 )a nd ( Y
page 60).
G WARNING
Electrostati cb uild -u pc an lead to the creation
of sparks, which could ignite the highl ye xplo-
sive gases of ab at tery .T here is ar is kofa n
explosion.
Before handling the battery ,t ouch the vehicle
body to remove any existing electrostatic
build-up.
The highl yf lammabl eg as mixture form sw he n
charging the battery as well as when jump-start-
ing. Alway sm ak es ur et ha tn either yo un or the bat-
tery is electrostaticall yc harged. Ab uild -u po f
electrostatic charge can be caused ,f or exam-
ple: R
by wearing clothing made from synthetic
fibers R
du etof rictio nb et ween clothing and seats R
if yo up us horp ul lt he battery across the car-
pe toro the rs yn theti cm at erialsR
if yo uw ip et he battery with ac loth
G WARNING
During the charging process ,ab at tery produ-
ces hydrogen gas. If as hort circui to ccurs or
sparks are created ,t he hydrogen ga sc an
ignite .T here is ar is kofane xplosion.R
Make sure tha tt he positive terminal of a
connected battery does not come into con-
tact with vehicl ep ar ts.R
Never place meta lo bj ects or tool sonab at -
tery. R
It is important tha ty ou observe the descri-
be do rder of the battery terminal sw he n
connecting and disconnecting ab at tery.R
Whe nj ump-starting ,m ak es ur et ha tt he
battery pole sw it hi de ntical polarity are
connected. R
It is particularly important to observe the
describe do rder when connecting and dis-
connecting the jumper cables. R
Never connect or disconnect the battery
terminal sw hile the engine is running.
G WARNING
Battery aci disc austic .T here is ar is kofi njury.
Avoi dc ontact with skin, eyes or clothing. Do
not inhal ea ny battery gases .Don ot lean over
the battery .K ee pc hildren away from batter-
ies. Wash away battery aci di mmediatel yw it h
plenty of clean water and see km edica la tten-
tion.
H Environmental note
Batterie sc ontain pollu-
tants .Itisi llegal to dispose
of them with the householdBattery (vehicle) 251
Breakdo wn assis tance Z

rubbish. They must be col-
lected separately and dis-
posed of in an environmen-
tall yr esponsible recycling
system.
Dispose of batterie sina n
environmentally responsi-
ble manner. Take dis-
charge db atterie stoaq uali-
fied specialist workshop or
to ac ollection point for
used batteries.
! Have the battery checked regularl yata
qualified specialist workshop.
Observe the service interval sint he Mainte-
nance Booklet or contact aq ualified specialist
workshop for more information.
! Always have work on batterie sc arrie do ut at
aq ualified specialist workshop.
Shoul di t, in exceptiona lc ircumstances, be
absolutel yn ecessary to disconnect the 12-
volt battery yourself, please observe the fol-
lowing: R
Secure the vehicl etop revent it from rolling
away. R
Switch off the ignition. R
Disconnect the negative terminal first and
then the positive terminal.
The transmission is locked in position ]
after disconnecting the battery.
After the work has been done, install the bat-
tery and replace the cover of the positive ter-
minal clamp firmly.
Comply with safety precautions and take pro-
tective measures when handling batteries.
Ris kofe xplosion.
Fire, open flame sa nd smoking are
prohibited when handling the bat-
tery. Avoid creating sparks.
Battery acid is caustic. Avoid contact
with skin, eye sorc lothing.
Wea rs uitable protective clothing,
especially gloves, apro na nd face-
guard. Rinse any acid spills immediately
with clea rw ater. Contact ap hysician
if necessary.
Wea re ye protection.
Keep children away.
Observe this Operator's Manual.
For safety reasons, Mercedes-Benz recom-
mends that you only use batterie sw hich have
been tested and approved for you rv ehicl eb y
Mercedes-Benz. These batterie sp rovide
increase di mpact protection to prevent vehicle
occupants from suffering acid burns should the
battery be damaged in the event of an accident.
In order for the battery to achieve the maximum
possible service life ,itm ust alway sbes uffi-
ciently charged.
Like other batteries, the vehicl eb attery may
discharge over time if you do not use the vehicle.
In this case, have the battery disconnected at a
qualified specialist workshop .Y ou can also
charge the battery with ac harge rr ecommended
by Mercedes-Benz. Contact aq ualified special-
ist workshop for further information.
Have the battery condition of charge checked
more frequently if you use the vehicl em ainl yf or
short trips or if you leave it standing idl ef or a
lengthy period. Consult aq ualified specialist
workshop if you wis htol eave you rv ehicle
parked for al ong perio doft ime.
Remove the SmartKey if you park the vehicle
and do not require any electrica lc onsumers.
The vehicl ew il lt hen use very little energy ,t hus
conserving battery power.
If the powe rs upply has been interrupted ,e .g. if
you reconnect the battery ,y ou wil lh ave to:R
reset the function for automatically folding
the exterior mirrors in/out by folding the mir-
rors out once ( Y
pag e9 1)R
set the clock
On vehicles with am ultimedia system, the
time is set automatically.252
Battery (vehicle)
Breakdown assistance