2018 MERCEDES-BENZ SL ROADSTER battery

Maintenance and care......................258
Engine compartment ........................... 258
Overview of the engine compartment .. 261
ASSYST PLUS ...................................... 262
Care ..................................................... 263
Breakdown assistance .....................269
Where will I find...? .............................. 269
Flat tire ................................................ 271
Battery (vehicle) .................................. 275
Jump-starting ....................................... 278
Towing and tow-starting ...................... 280
Fuses ...................................................2 82
Wheels and tires............................... 285
Important safety notes ........................ 285
Operation ............................................ 285
Winter operation .................................. 287
Tire pressure ....................................... 288
Loading the vehicle .............................. 295
All about wheels and tires ................... 297
Changing a wheel ................................ 303
Wheel and tire combinations ...............3 08
Technical data................................... 310
Information regarding technical data ... 310
Vehicle electronics .............................. 310
Identification plates .............................3 11
Service products and filling capaci-
ties ...................................................... 312
Vehicle data ......................................... 317
Contents3

Engaging neutral ............................ 132
Engaging park position automati-
cally ............................................... 132
Engaging reverse gear ................... 132
Engaging the park position ............ 131
Gearshift recommendation ............ 138
Kickdown ....................................... 134
Manual shifting .............................. 136
Oil temperature (on-board com-
puter, Mercedes-AMG vehicles) ..... 197
Overview ........................................ 130
Problem (malfunction) ................... 139
Pulling away ................................... 124
Selector lever ................................ 130
Starting the engine ........................ 124
Steering wheel paddle shifters ...... 136
Transmission position display ........ 131
Transmission positions .................. 133
Automatic transmission emer-
gency mode ....................................... 139
B
Back button ....................................... 237
BAS (Brake Assist System) ................. 60
Battery (SmartKey)
Checking .......................................... 76
Important safety notes .................... 75
Replacing ......................................... 76
Battery (vehicle)
Charging ........................................ 277
Display message ............................ 214
Important safety notes .................. 275
Jump starting ................................. 278
Overview ........................................ 275
Belt
see Seat belts
Belt warning ......................................... 44
Blind Spot Assist
see Active Blind Spot Assist
Bluetooth
®
Searching for a mobile phone ........ 240
see also Digital Operator's Man-
ual .................................................. 236
Telephony ...................................... 239
Brake Assist System
see BAS (Brake Assist System) Brake Assist with cross-traffic
function
Function/notes ................................ 61
Important safety notes .................... 61
Brake fluid
Display message ............................ 206
Notes ............................................. 315
Brake force distribution
see EBD (electronic brake force
distribution)
Brake lamps
Adaptive ........................................... 65
Display message ............................ 212
Brakes
ABS .................................................. 60
Adaptive Brake Assist ...................... 64
BAS .................................................. 60
Brake Assist with cross-traffic
function ........................................... 61
Brake fluid (notes) ......................... 315
Display message ............................ 201
EBD .................................................. 69
High-performance brake system .... 148
Important safety notes .................. 146
Maintenance .................................. 147
Parking brake ................................ 142
Riding tips ...................................... 146
Warning lamp ................................. 228
Breakdown
see Flat tire
see Towing away
Breakdown assistance
Reflective safety jacket .................. 269
Where will I find...? ........................ 269
Brightness control (instrument
cluster lighting) ................................... 33
C
California
Important notice for retail cus-
tomers and lessees .......................... 25
Calling up a malfunction
see Display messages
Car
see Vehicle
Care
Car wash ........................................ 263
6Index

SD memory cardsee also Digital Operator's Man-
ual .................................................. 236
Selecting ........................................1 91
Search & Send
see also Digital Operator's Man-
ual ..................................................2 36
Seat
Correct driver's seat position ........... 95
Seat belts
Adjusting the driver's and front-
passenger seat belt ......................... 44
Correct usage .................................. 43
Fastening ......................................... 44
Important safety guidelines ............. 42
Introduction ..................................... 41
Releasing ......................................... 44
Seat belt guide ................................. 97
Switching belt adjustment on/off
(on-board computer) ...................... 197
Warning lamp ................................. 227
Warning lamp (function) ................... 44
Seats
Adjusting (electrically) ..................... 97
Adjusting the head restraint ............ 98
Belt guide ......................................... 97
Important safety notes .................... 95
Overview .......................................... 95
Seat heating problem ...................... 99
Seat ventilation problem ................ 100
Sliding forward/back ....................... 98
Storing settings (memory func-
tion) ............................................... 105
Switching AIRSCARF on/off .......... 100
Switching seat heating on/off ......... 99
Switching seat ventilation on/off .... 99
Selector lever
Positions ........................................ 130
Sensors (cleaning instructions) ....... 267
Service menu (on-board com-
puter) .................................................. 194
Service message
see ASSYST PLUS
Service products
Brake fluid ..................................... 315
Coolant (engine) ............................ 315
Engine oil ....................................... 314
Fuel ................................................ 313 Important safety notes .................. 312
Refrigerant (air-conditioning sys-
tem) ............................................... 316
Washer fluid ................................... 316
Setting the air distribution ............... 117
Setting the airflow ............................ 117
Se

tting the date/time format
see also Digital Operator's Man-
ual .................................................. 236
Setting the language
see also Digital Operator's Man-
ual .................................................. 236
Setting the time
see also Digital Operator's Man-
ual .................................................. 236
Settings
Factory (on-board computer) ......... 197
On-board computer ....................... 194
SETUP (on-board computer,
Mercedes-AMG vehicles) .................. 198
Side impact air bag ............................. 46
Side marker lamp (display mes-
sage) ................................................... 212
Side windows
Cleaning ......................................... 266
Convenience closing feature ............ 87
Important safety information ........... 85
Opening/closing (all) ....................... 87
Opening/closing (front) ................... 86
Opening/closing (rear) .................... 86
Overview .......................................... 85
Problem (malfunction) ..................... 88
Resetting ......................................... 88
Reversing feature ............................. 86
SIRIUS services
see also Digital Operator's Man-
ual .................................................. 236
SmartKey
Changing the battery ....................... 76
Changing the programming ............. 74
Checking the battery ....................... 76
Display message ............................ 225
Door central locking/unlocking ....... 73
Important safety notes .................... 73
Loss ................................................. 77
Mechanical key ................................ 75
Opening/closing the roof ................ 90
Index17

Turn signalsDisplay message ............................ 212
Switching on/off ........................... 107
Two-way radio
Frequencies ................................... 310
Installation ..................................... 310
Transmission output (maximum) .... 310
Type identification plate
see Vehicle identification plate
U
Umbrella holder ................................. 243
Unlocking
Emergency unlocking ....................... 80
From inside the vehicle (central
unlocking button) ............................. 79
Upshift indicator (on-board com-
puter, Mercedes-AMG vehicles) ....... 197
USB devices
Connecting to the Media Inter-
face ...............................................2 41
V
Vehicle
Correct use ...................................... 28
Data acquisition ............................... 29
Display message ............................ 222
Electronics ..................................... 310
Equipment ....................................... 25
Individual settings .......................... 194
Limited Warranty .............................2 9
Loading .......................................... 295
Locking (in an emergency) ............... 80
Locking (SmartKey) .......................... 73
Lowering ........................................ 308
Maintenance .................................... 26
Parking for a long period ................ 144
Pulling away ................................... 124
Raising ........................................... 305
Reporting problems ......................... 28
Securing from rolling away ............ 305
Tow-starting ................................... 280
Towing away .................................. 280
Transporting .................................. 282
Unlocking (in an emergency) ........... 80
Unlocking (SmartKey) ...................... 73
Vehicle data ................................... 317 Vehicle battery
see Battery (vehicle)
Vehicle data ....................................... 317
Vehicle dimensions ........................... 317
Vehicle emergency locking ................ 80
Vehicle identification number
see VIN
Vehicle identification plate .............. 311
Vehicle level
Active Body Control (ABC) (except
Mercedes-AMG vehicles) ............... 163
Active Body Control (ABC)
(Mercedes-AMG vehicles) .............. 165
Display message ............................ 215
Vehicle tool kit .................................. 270
Video
Operating the DVD ......................... 191
see also Digital Operator's Man-
ual .................................................. 236
VIN
Seat ............................................... 312
Type plate ...................................... 311W
Warning and indicator lampsABS ................................................ 229
Active Brake Assist ........................ 234
Brake Assist ................................... 234
Brakes ........................................... 228
Check Engine ................................. 232
Coolant .......................................... 232
Distance Pilot DISTRONIC ............. 234
Distance warning ........................... 234
ESP
®.............................................. 229
ESP®OFF ....................................... 230
Fuel tank ........................................ 232
General notes ................................ 227
Parking brake ................................ 231
PASSENGER AIR BAG ...................... 41
Reserve fuel ................................... 232
Restraint system ............................ 231
Seat belt ........................................ 227
SPORT handling mode ................... 231
Tire pressure monitor .................... 235
Warning triangle ................................ 269
Warranty .............................................. 25
Index21

Diagnostics connection
The diagnosticsconnection is only intended fo r
th econnection of diagnostic equipmen tat a
qualified specialis tworkshop .
GWARNING
If you connec tequipmen tto adiagnostic s
connection in th evehicle, it may affec tth e
operation of vehicle systems .As aresult ,th e
operatin gsafet yof th evehicle could be affec -
ted. There is aris kof an accident.
Only connec tequipmen tto adiagnostic scon-
nection in th evehicle, whic his approved fo r
your vehicle by Mercedes-Benz.
GWARNING
Objects in th edriver's footwell may restric t
th eclearanc earound th epedals or bloc k a
depressed pedal. Thi sjeopardizes th eoper-
atin gand road safet yof th evehicle. There is a
ris kof an accident.
Stow all objects securely in th evehicle so that
they do no tget into th edriver's footwell.
Whe nusin gfloormat sor carpets, mak esur e
that they are properly secure dso that they do
no tslip or obstruct th epedals. Do no tplac e
severa lfloormat sor carpet son to pof on e
another.
!If th eengin eis switched of fand equipmen t
on th ediagnostic sconnection is used ,th e
starter battery may discharge.
Connectin gequipmen tto th ediagnostic scon-
nection can lead to emission smonitorin ginfor-
mation bein greset ,fo rexample. Thi smay lead
to th evehicle failin gto mee tth erequirements of
th enext emission stest durin gth emain inspec-
tion .
Qualified specialist workshop
An authorized Mercedes-Ben zCente ris aquali-
fie dspecialis tworkshop .It has th enecessary
specialis tknowledge ,tools and qualification sto
correctl ycarry out th ewor krequire don your
vehicle. Thi sis especially th ecas efo rwor krel -
evant to safety.
Observ eth enote sin th eMaintenance Booklet .Always hav
eth efollowin gwor kcarrie dout at an
authorized Mercedes-Ben zCenter:
Rwor krelevant to safet y
Rserviceand maintenance wor k
Rrepair work
Ralterations, installation wor kand modifica-
tion s
Rworkon electronic component s
Correct use
If you remov eany warnin gstickers ,you or oth-
ers could fail to recogniz ecertain dangers.
Leave warnin gstickers in position .
Observ eth efollowin ginformation when drivin g
your vehicle:
Rth esafet ynote sin this manual
Rtechnical dat afo rth evehicle
Rtraffic rule sand regulation s
Rlaws and safetystandard spertainin gto moto r
vehicles
Problem swit hyou rvehicle
If you should experience aproblem wit hyour
vehicle, particularly on ethat you believe may
affec tit s saf eoperation ,we urg eyou to contact
an authorized Mercedes-Ben zCente rimmedi-
ately to hav eth eproblem diagnosed and recti -
fied. If th eproblem is no tresolved to your sat -
isfaction ,please discus sth eproblem again wit h
an authorized Mercedes-Ben zCente ror ,if nec-
essary, contact us at on eof th efollowin g
addresses.
In th eUSA
Customer Assistanc eCente r
Mercedes-Ben zUSA, LL C
3 Mercedes Drive
Montvale, NJ 07645-0350
In Canad a
Customer Relation sDepartmen t
Mercedes-Ben zCanada, Inc.
98 Vanderhoo fAvenue
Toronto ,Ontario M4 G4C9
Reporting safet ydefect s
USAonly:
28Operating safety
Introduction

XBrake immediately to defuse the situation.
or
XTake evasive action provided it is safe to do
so.
Active Brake Assist with cross-traffic function
can also brake the vehicle automatically under
the following conditions:
Rthe driver and front-passenger have their seat
belts fastened
and
Rthe vehicle speed is between approximately
4 mph (7 km/h) and 124 mph (200 km/h)
Up to a speed of approximately 44 mph
(70 km/h), Active Brake Assist with cross-traffic
function may react to:
Rstationary objects in the path of your vehicle,
e.g. stopped or parked vehicles
Rpedestrians in the path of your vehicle
iIf there is an increased risk of a collision,
preventive passenger protection measures
(PRE-SAFE
®) are triggered (Ypage 55).
If the risk of collision with the vehicle in front
remains and you do not brake, take evasive
action or accelerate significantly, the vehicle
may perform automatic emergency braking, up
to the point of full brake application. Automatic emergency braking is not performed until imme-
diately prior to an imminent accident.
You can prevent the intervention of Active Brake
Assist with cross-traffic function at any time by:
Rdepressing the accelerator pedal further
Ractivating kickdown
Rreleasing the brake pedal.
The braking application of Active Brake Assist
with cross-traffic function is ended automati-
cally if:
Ryou maneuver to avoid the obstacle
Rthere is no longer a risk of collision
Ran obstacle is no longer detected in front of
your vehicle.
STEER CONTROL
General information
STEER CONTROL helps you by transmitting a
noticeable steering force to the steering wheel
in the direction required for vehicle stabilization. This steering assistance is provided in particular
if:
Rboth right wheels or both left wheels are on a
wet or slippery road surface when you brake
Rthe vehicle starts to skid
Important safety notes
iObserve the "Important safety notes" sec-
tion (Ypage 60).
No steering support is provided from STEER
CONTROL, if:
RESP®is deactivated
RESP®is malfunctioning
Rthe steering is faulty
If ESP®is malfunctioning, you will be assisted
further by the electrical power steering.
Protection against theft
Immobilizer
XTo activate with the SmartKey: remove the
SmartKey from the ignition lock.
XTo activate with KEYLESS-GO: switch the
ignition off and open the driver's door.
XTo deactivate: switch on the ignition.
The immobilizer prevents your vehicle from
being started without the correct SmartKey.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. The
engine can be started by anyone with a valid
SmartKey that is left inside the vehicle.
iThe immobilizer is always deactivated when
you start the engine.
In the event that the engine cannot be started
(yet the vehicle's battery is charged), the sys- tem is not operational. Contact an authorized
Mercedes-Benz Center or call
1-800-FOR-MERCedes (in the USA) or
1-800-387-0100 (in Canada).
Protection against theft71
Safety
Z

Locking/unlocking centrally
You can start, lock or unlock the vehicle using
KEYLESS-GO. To do this, you only need carry the
SmartKey with you. You can combine the func-
tions of KEYLESS-GO with those of a conven-
tional SmartKey. Unlock the vehicle by using
KEYLESS-GO, for instance, and lock it using the
&button on the SmartKey.
The driver's door and the door at which the han-
dle is used, must both be closed. The SmartKey
must be outside the vehicle. When locking or
unlocking with KEYLESS-GO, the distance
between the key and the corresponding door
handle must not be greater than 3 ft (1 m).
A check which periodically establishes a radio
connection between the vehicle and the Smart-
Key determines whether a valid SmartKey is in
the vehicle. This occurs, for example:
Rwhen starting the engine
Rwhile driving
Rwhen using HANDS-FREE ACCESS
Rwhen the external door handles are touched
XTo unlock the vehicle: touch the inner sur-
face of the door handle.
XTo lock the vehicle: touch sensor surface :
or ;.
Make sure that you do not touch the inner
surface of the door handle.
XConvenience closing feature: touch
recessed sensor surface ;for an extended
period.
Further information on the convenience clos-
ing feature (
Ypage 87).
Deactivating and activating
If you do not intend to use a SmartKey for an
extended period of time, you can deactivate the
KEYLESS-GO function of the key. The SmartKey will then use very little power, thereby conserv-
ing battery power. For the purposes of activa-
tion/deactivation, the vehicle must not be
nearby.
XTo deactivate: press the&button on the
SmartKey twice in rapid succession.
The battery check lamp (
Ypage 76) of the
SmartKey flashes twice briefly and lights up
once, then KEYLESS-GO is deactivated.
XTo activate: press any button on the Smart-
Key.
or
XInsert the SmartKey into the ignition lock.
KEYLESS-GO and all of its associated features
are available again.
Changing the settings of the locking
system
You can change the settings of the locking sys-
tem. This means only the driver's door, the lock-
able stowage compartments in the vehicle inte-
rior and the fuel filler flap are unlocked when the
vehicle is unlocked. This is useful if you fre-
quently travel alone.
XTo change the setting: press and hold down
the % and& buttons simultaneously
for about six seconds until the battery indica-
tor lamp (
Ypage 76) flashes twice.
If the setting of the locking system is changed
within the signal range of the vehicle, pressing
the & or% button:
Rlocks or
Runlocks the vehicle
The SmartKey now functions as follows:
XTo unlock: press the%button once.
XTo unlock centrally: press the%button
twice.
XTo lock centrally: press the&button.
The KEYLESS-GO function is changed as fol-
lows:
XTo unlock the driver's door: touch the inner
surface of the door handle on the driver's
door.
XTo unlock centrally: touch the inner surface
of the driver or front-passenger door handle.
XTo lock centrally: touch the outer sensor
surface on one of the door handles.
74SmartKey
Opening and closing

XTo restore the factory settings:press and
hold down the %and& buttons simul-
taneously for approximately six seconds until
the battery check lamp (
Ypage 76) flashes
twice.
Mechanical key
General notes
If the vehicle can no longer be locked or
unlocked with the SmartKey or with KEYLESS-
GO, use the mechanical key.
If you use the mechanical key to unlock and
open the driver's door or the trunk lid, the anti-
theft alarm system will be triggered. Switch off
the alarm (
Ypage 72).
Removing the mechanical key
XPush release catch :in the direction of the
arrow and at the same time remove mechan- ical key ;from the SmartKey.
For further information about:
Runlocking the driver's door (Ypage 80)
Runlocking the trunk (Ypage 85)
Rlocking the vehicle (Ypage 80)
Inserting the mechanical key
XPush mechanical key ;completely into the
SmartKey until it engages and release
catch :is back in its basic position.
SmartKey battery
Important safety notes
GWARNING
Batteries contain toxic and corrosive substan- ces. If batteries are swallowed, it can result in
severe health problems. There is a risk of fatalinjury.
Keep batteries out of the reach of children. If
a battery is swallowed, seek medical attention
immediately.
HEnvironmental note
Batteries contain pollutants.
It is illegal to dispose of them
with the household rubbish.
They must be collected sep-
arately and disposed of in an
environmentally responsible
recycling system.
Dispose of batteries in an
environmentally responsible
manner. Take discharged
batteries to a qualified spe-
cialist workshop or to a col-
lection point for used batter-
ies.
The SmartKey batteries contain perchlorate
material, which may require special handling
and regard for the environment. National guide-
lines must be observed during disposal. In Cal-
ifornia, see www.dtsc.ca.gov/
HazardousWaste/Perchlorate/index.cfm .
Mercedes-Benz recommends that you have the
batteries replaced at a qualified specialist work-
shop.
SmartKey75
Opening and closing
Z