2009 MERCEDES-BENZ SLR battery

374 Practical hintsTowing the vehicleWarning!
G
The brake system requires electrical power
to operate.
A malfunction in the vehicle’s power supply
or electrical system may impair brake sys-
tem operation and switch it into its emer-
gency operation mode. To brake, the driver
must then apply significantly greater brake
pedal pressure and depress the pedal much
further to obtain the expected braking ef-
fect. If necessary, apply full pressure to the
brake pedal. Brakes are only applied to the
front wheels. Stopping distance is in-
creased! Adapt your driving style according-
ly. For more information, see
“Electro-hydraulic brake system”
(page 87).
With the engine not running, there is no
power assistance for the brake and steering
systems. In this case, it is important to keep
in mind that a considerably higher degree of
effort is necessary to brake and steer the
vehicle. Adapt your driving accordingly.
!
Towing of the vehicle should only be done
using the properly installed towing eye bolt.
Never attach tow cable, tow rope or tow rod to
the vehicle chassis, frame or suspension parts.
i
To signal turns while being towed with the
hazard warning flasher in use, turn SmartKey in
starter switch to position2 and activate the
combination switch for the left or right turn
signal in the usual manner – only the selected
turn signal will operate.
Upon canceling the turn signal, the hazard
warning flasher will operate again.
i
When towing the vehicle with all wheels on
the ground, please note the following:
With the automatic central locking activated and
the SmartKey in starter switch position2 the
vehicle doors lock if the left front wheel as well
as the right rear wheel are turning at vehicle
speeds of approximately 9 mph (15 km/h) or
more.
To prevent the vehicle door locks from locking,
deactivate the automatic central locking
(
page 139) and switch off the tow-away alarm
(page 95).
i
The gear selector lever will remain locked in
park positionP and the SmartKey will not turn in
the starter switch if the battery is disconnected
or discharged. See notes on the battery
(
page 370).

375 Practical hints
Towing the vehicle
Installing/reinstalling towing eye bolt
Take the towing eye bolt1 from its
storage compartment (
page 356).
1Towing eye bolt

Remove cover from the access hole.

Screw towing eye bolt1 clockwise in
to its stop.

Remove the towing eye bolt when you
no longer need it. To do this, carry out
the above steps in reverse order.
Points to bear in mind

The vehicle must not be tow-started.


If the vehicle is to be towed, only tow it
with all wheels on the ground.


If the vehicle has suffered transmission
damage, only tow it with the propeller
shaft disconnected.


Before towing the vehicle, make sure
the battery is connected and charged.
Otherwise you will not be able to switch
on the ignition and move the selector
lever to neutral positionN. There will
then be no power assistance when
steering and braking.
Transporting the vehicle
The towing eye bolt can be used to pull the
vehicle onto a trailer or transporter for
transporting purposes.
Switch on the ignition (
page 40).

Move the selector lever to neutral
positionN.
!
Only secure the tow bar to the towing eye
bolt. The vehicle could otherwise be damaged.
!
Your vehicle is equipped with a front towing
eye bolt only (
page 375).
You cannot tow other vehicles with your vehicle.
!
Due to the low clearance height of the SLR,
care must be taken when loading and unloading
from a transporter to avoid damaging the vehicle
body work.
To secure the vehicle, only tie it down by the
wheels or tires. Otherwise it could be damaged.

390 Technical dataElectrical system
Mercedes-Benz SLR McLaren
Roadster
Mercedes-Benz SLR McLaren
Roadster 722 S
Generator (alternator)
14 V/150 A
14 V/150 A
Starter motor
12 V/1.7 kW
12 V/1.7 kW
Battery
Starter battery
12 V/35 Ah
12 V/35 Ah
Battery for electrical consumers
12 V/70 Ah
12 V/70 Ah
Spark plugs
NGK ILFR6A
NGK ILFR6A
Electrode gap
0.031 in (0.8 mm)
0.031 in (0.8 mm)
Tightening torque
18 – 22 lb-ft (25 – 30 Nm)
18 – 22 lb-ft (25 – 30 Nm)

407 Technical terms
Tele Aid
(Tele
matic A
larm I
dentification on
Demand)
The Tele Aid system consists of three
types of response: automatic and
manual emergency, Roadside
Assistance and Information. Tele Aid is
initially activated by completing a
subscriber agreement and placing an
acquaintance call.
The Tele Aid system is operational
provided that the vehicle’s battery is
charged, properly connected, not dam-
aged and cellular and GPS coverage is
available.
Tightening torque
Force times lever arm (e.g. a lug
wrench) with which threaded fasteners
such as wheel bolts are tightened.TIN
(T
ire I
dentification N
umber)
(
page 288)
Tire load rating
(page 288)
Tire ply composition and material used
(page 288)
Tire speed rating
(page 288)
TIREFIT kit
Accessory for emergency and tempo-
rary tire repair. The TIREFIT kit consists
of a container with sealant material, a
filler hose and an air compressor.
Traction
(page 288)Tread
(
page 288)
Treadwear indicators
(page 288)
Uniform Tire Quality Grading Standards
(page 289)
Vehicle capacity weight
(page 288)
Vehicle maximum load on the tire
(page 289)
VIN
(Vehicle I
dentification N
umber)
The number set by the manufacturer
and placed on the body to uniquely
identify each vehicle produced.

410 IndexAuto-dimming, Interior rear view
mirror 181
Automatic car wash 298
Automatic central locking, Control
system 104, 139
Automatic climate control 184
Adjusting air volume 191
Air conditioning refrigerant 396
Air conditioning, Cooling 194
Air distribution 189, 190
Air recirculation mode 193
Air vents 185
Air volume 189
Control panel 186
Deactivating system 188
Defrosting 183, 192
MAX COOL 191
Residual heat utilization 195
Side air vents 185
Temperature 189
Temperature sensor 33
Automatic headlamp mode 107Automatic lighting control, Interior
lighting 112
Automatic transmission 169
Accelerator position 173
Damage 375
Driving tips 173
Emergency operation (Limp-Home
Mode) 180
Gear ranges 174
Gear selector lever 32, 169
Gear selector lever control one-touch
gearshifting 175
Gear selector lever position 171
Gear shifting malfunctions 180
Kickdown 173
Manual shift program 178
Shift program mode selector
switch 175
Shifting procedure 170
Starting the engine 47
Steering wheel gearshift control
one-touch gearshifting 177
Towing 375
Transmission fluid level 254
Automatic transmission fluid 254B
Backup lamp 362
Messages in the multifunction
display 349
Bar 286
BAS 84, 403
Batteries, SmartKey
Checking battery condition 100
Replacing 359
Batteries, Vehicle 256
Charging 371
Consumer battery 370
Jump starting 370
Maintenance 370
Messages in the multifunction
display 332
Starter battery 256
Batteries, vehicle
Consumer battery 256
Battery charger 372
Bead 286
Bi-Xenon headlamps 403

416 Index
Low beam 107
Messages in the multifunction
display 346
Replacing bulbs 361
Switch 51, 106
Head-thorax air bag 67, 404
High performance driving 239
High-beam flasher 51, 110
Replacing bulbs 361
High-beam headlamps
Indicator lamp 29
Messages in the multifunction
display 346
Replacing bulbs 361
Switching on 110
High-mounted brake lamp 362
High-pressure cleaners 299
Hood 250
Messages in the multifunction
display 353
Horn 27
HVAC see Automatic climate control
Hydroplaning 241I
Identification labels 382
Identification Number, Vehicle (VIN) 382
Ignition 40
Immobilizer 93
Indicator lamps see Lamps, Indicator and
warning
Infant and child restraint systems see Chil-
dren in the vehicle
Inflation pressure see Tires, Inflation pres-
sure
Inside door handle 34
Instrument cluster 28, 114, 405
Illumination brightness 114
Lamps 304
Messages in display see Multifunction
display messages
Multifunction display 117
Instrument lighting see Instrument cluster,
Illumination brightness
Instrument panel see Instrument cluster
Instruments and controls see Cockpit
Interior lighting 112
Delayed switch-off 137
Interior rear view mirror 44Auto-dimming 181
Interior storage spaces see Storage com-
partments
J
Jacking up the vehicle 365
Jump starting 370
K
Key, Mechanical 357
Key, SmartKey
Battery check lamp 100
Checking the batteries 100
Factory setting 99
Locking/unlocking 98
Locking/unlocking, Global setting 99
Locking/unlocking, Selective
setting 100
Loss of 101
Messages in the multifunction
display 345
Positions in starter switch 40
Remote control 98
Replacing the batteries 359
Turning off the engine 56

417 Index
Unlocking, Trunk 100
Kickdown 173, 405
Kilopascal 287
Knee air bags 66
L
Labels
Certification 382
Emission control label 382
Lamps
Exterior 361
Lamps, exterior
Messages in the multifunction
display 346
Lamps, indicator and warning
ABS 29, 306
ABS/ESP
®
29, 304
Airbrake 29, 311
Battery, SmartKey 100
Brake 29, 307
Center console 317
Combination low tire pressure/TPMS
malfunction telltale 29, 315Coolant 29, 310
Engine malfunction 29, 308
Engine oil temperature 29, 311
Fog lamps 109
Fuel reserve 29, 311
Gearshift 29, 311
High beam 29
Instrument cluster 304
PASSENGER AIR BAG OFF 70, 317
Passenger front air bag off 317
Seat belt telltale 29, 312
Seat belts 312–313
SRS 29, 61, 314
Turn signals 29
Language, Setting 133
License plate lamp
Messages in the multifunction
display 347
Replacing bulbs 361
License plate lamps 362
Light sensorMessages in the multifunction
display 347
Lighter see Cigarette lighter
Lighting
Automatic headlamp mode 107
Exterior 106
Instruments 114
Interior 112
Low-beam headlamps 107
Manual headlamp mode 107
Limp-Home Mode, Automatic
transmission 180
Linkage covers 202
Loading see Vehicle loading
Location
Audio system 145
Compact guide (Canada only) 209
Vehicle literature portfolio 356
Locator lighting 109, 135
Loss of
Keys 101
Service and Warranty Information
Booklet 381

418 IndexLow-beam headlamps 106, 107
Messages in the multifunction
display 348
Replacing bulbs 361
Switching on 51
Lubricants 393
M
Main odometer 29
Maintenance 294, 370
Calling up service indicator 296
Resetting service indicator 296
Service indicator 294
Service term exceeded 295
Manual headlamp mode 107
Manual shift program, Automatic
transmission 178
Map pocket in passenger footwell 209
Maximum load rating, Tires 287
Maximum loaded vehicle weight 287
Maximum tire inflation pressure 287
Mechanical key 357
Menus see Control system menusMessages (on-board computer)
Soft top 354
Messages in display see Multifunction dis-
play messages 319
Microphone, Hands-free 33
Mirrors 181
Adjusting 43
Auto-dimming 181
Exterior rear view mirror 44
Interior rear view mirror 44
Mobile phone
Pairing with Bluetooth
®
interface 213
MON 247, 405
Motor Octane Number see MON
Multifunction display 117, 405
Changing settings see Control system
menus and Control system
submenus 117
Left 29
Right 29
Selecting language 133
Multifunction display messages
ABS 321, 322ACL malfunction 328
Airbrake 332
Battery, Vehicle 332
Brake pads 339
Coolant 340
Coolant level 340
Differential 343
Doors 353
Electro-hydraulic brake system 334
Engine oil 344
ESP
®
323
Fuel system 344
Hood 353
Lamps 346
Parking brake 339
Passenger front air bag 326
Reserve fuel 345
Seat belt 353
Service brake 339
SmartKey 345