2008 MERCEDES-BENZ SL55AMG tow

432 Practical hints
Jump starting
If the starter battery is discharged, the en-
gine can be started with jumper cables and
the battery of another vehicle. Observe the
following:

Jump starting should only be performed
when the engine and catalytic
converter are cold.

Do not start the engine if the battery is
frozen. Let the battery thaw out first.

Only jump start from batteries with the
same voltage rating (12 V). Jump start-
ing with a higher voltage battery could
damage the vehicle’s electrical system,
which will not be covered by the
Mercedes-Benz Limited Warranty.

Only use jumper cables with sufficient
cross section and insulated terminal
clamps.

Always make sure the jumper cables
are not on or near pulleys, fans, or
other parts that move when an engine
is started or running.
Warning!G
Failure to follow these directions will cause
damage to the electronic components, and
can lead to a battery explosion and severe
injury or death.
Never lean over batteries while connecting
or jump starting, you might get injured.
Battery fluid contains sulfuric acid. Do not
allow this fluid to come in contact with eyes,
skin or clothing. In case it does, immediately
flush affected area with water, and seek
medical help if necessary.
A battery will also produce hydrogen gas,
which is flammable and very explosive. Keep
flames or sparks away from battery, avoid
improper connection of jumper cables,
smoking, etc.
Attempting to jump start a frozen battery
can result in it exploding, causing personal
injury.
Read all instructions before proceeding.
!Do not tow-start the vehicle.
!Jump starting may only be performed on the
battery installed in the engine compartment.
Avoid repeated and lengthy starting attempts.
Do not attempt to start the engine using a bat-
tery quick charge unit.
If the engine does not run after several unsuc-
cessful starting attempts, have it checked at the
nearest authorized Mercedes-Benz Center.
Excessive unburned fuel generated by repeated
failed starting attempts may damage the
catalytic converter and may present a fire risk.
Make sure the jumper cables do not have loose
or missing insulation.
Make sure the cable clamps do not touch any
other metal part while the other end is still
attached to a battery.

434 Practical hints
Towing the vehicle
Mercedes-Benz recommends that the vehi-
cle be transported with all wheels off the
ground using flatbed or appropriate wheel
lift/dolly equipment.
When circumstances do not permit the
recommended towing methods, the
vehicle may be towed with all wheels on
the ground or front wheels raised only so
far as necessary to have the vehicle moved
to a safe location where the recommended
towing methods can be employed.
!Do not tow-start the vehicle.
!Use flatbed or wheel lift/dolly equipment
with SmartKey in starter switch turned to
position0.
Do not tow with sling-type equipment. Towing
with sling-type equipment over bumpy roads will
damage radiator and supports.
To prevent damage during transport, do not tie
down vehicle by its chassis or suspension parts.
Switch off the tow-away alarm (
page 100) and
the automatic central locking (
page 166).
Warning!G
If circumstances require towing the vehicle
with all wheels on the ground, always tow
with a tow bar if:

the engine will not run

there is a malfunction in the
electro-hydraulic brake system

there is a malfunction in the power sup-
ply or in the vehicle’s electrical system
This is necessary to adequately control the
towed vehicle.
Prior to towing the vehicle with all wheels on
the ground, make certain that the SmartKey
is in starter switch position2.
Warning!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
increased! Adapt your driving style
accordingly. For more information, see
“Electro-hydraulic brake system”
(
page 94).
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 ve-
hicle. Adapt your driving accordingly.

435 Practical hints
Towing the vehicle
!If the vehicle is towed with the front axle
raised, the gear selector lever must be in
positionN and the engine must be shut off
(SmartKey in starter switch position0 or1).
Active braking action through the ESP
® may
otherwise seriously damage the brake system.
When towing the vehicle with all wheels on the
ground, the gear selector lever must be in
positionN and the SmartKey must be in starter
switch position2.
When towing the vehicle with all wheels on the
ground or the front axle raised, the vehicle
may be towed only for distances up to
30 miles (50 km) and at a speed not to exceed
30 mph (50 km/h).
!Towing of the vehicle should only be done
using the properly installed towing eye bolt.
Never attach a tow cable, tow rope or tow rod to
the vehicle chassis, frame or suspension parts.
iWhen 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, or
KEYLESS-GO* start/stop button in 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 122).
iTo 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 warn-
ing flasher will operate again.
iIf the battery is disconnected or discharged

the SmartKey will not turn in the starter
switch

the gear selector lever will remain locked in
positionP.
For more information, see “Batteries”
(
page 427) and “Jump starting” (page 432).

436 Practical hints
Towing the vehicle
Installing towing eye bolt
Front
Example illustration (SL 550 and SL 600
without Sport Package)
1Cover on passenger side of front
bumper
To remove cover:
Press mark on cover 1 in direction of
arrow.
Lift cover1off to reveal the threaded
hole for towing eye bolt.To reinstall cover:
Fit locking tabs of cover under the
lower edge of the opening in the
bumper.
Apply even pressure on the upper part
of the cover until it snaps into place.
Rear
1Cover on passenger side of rear
bumper
To remove cover:
Insert flat, blunt object as a lever into
upper left or right recess of cover 1.
Loosen cover 1 using the lever.
Fold cover 1 down in direction of
arrow to reveal the threaded hole for
the towing eye bolt.
To reinstall cover:
Fit cover 1 and snap into place.
Installing towing eye bolt
Take the towing eye bolt and the wheel
wrench from the vehicle tool kit
(
page 400).
Screw towing eye bolt into threaded
hole to its stop.
Insert wheel wrench into towing eye
and tighten towing eye bolt by turning
it clockwise.
Removing towing eye bolt
Take the wheel wrench from the
vehicle tool kit (
page 400).
Insert wheel wrench into towing eye
and loosen towing eye bolt by turning it
counterclockwise.
Remove towing eye bolt.

467 Index
A
ABC 230
Messages in the multifunction
display 361
Oil level 287
ABS 89
Indicator lamp 29, 344
Messages in the multifunction
display 363, 364
Warning lamp 27, 342
Accelerator position, automatic
transmission 175
Accessory weight 322
Accident 61
Active Body Control see ABC
Air bags 70
Children in the vehicle 84
Front 73
Head-thorax 74
Knee bag 74
Occupant Classification System
(OCS) 74Passenger 74
Passenger front air bag off indicator
lamp 78
Safety guidelines 72
Air conditioning system see Automatic
climate control system
Air distribution 192, 194
Air pressure 322
Tire inflation pressure 300
Air pump 422
Air recirculation mode 196
Air vents 189
Air volume 193, 195
Alarm system see Anti-theft systems
Alignment bolt (vehicle tool kit) 421
Anticorrosion/antifreeze 458, 464
Antiglare, Interior rear view mirror 185
Antilock Brake System see ABS
Anti-theft systems
Anti-theft alarm system 98
Immobilizer 98
Tow-away alarm 100
Aquaplaning see Hydroplaning
Armrest 239Ashtray 31, 244
Aspect ratio 322
ATF 287
Auto-dimming, Rear view mirrors 185
Automatic central locking 122
Control system 166
Automatic climate control system 188
Air conditioning, Cooling 198
Air conditioning refrigerant 460
Air distribution 192, 194
Air recirculation mode 196
Air vents 189
Air volume 193, 195
Control panel 190
Deactivating 191
Defrosting 187, 195
Residual heat utilization 199
Temperature 193
Temperature sensor 33
Ventilated glove box 200

484 Index
Tools 400
Total load limit 325
Tow-away alarm 100
Switch 32
Towing eye bolt 400
Installing 436
Towing the vehicle 434
TPMS (USA only) 305
Traction 93, 325
Transmission see Automatic transmission
Tread 325
Tread depth 293
Treadwear indicators 325
Trip computer 167
Trip odometer
Resetting 141
Trunk
Closing the lid 116
Lighting 139
Load assist 245
Messages in the multifunction
display 399Opening from inside vehicle 114
Opening/closing
system* 116, 117, 118
Parcel net 242
Power closing assist for trunk lid 121
Unlocking 114
Unlocking (KEYLESS-GO*) 114
Unlocking in an emergency 404
Unlocking separately 114
Valet locking 120
Trunk lid
Opening 115
Turn signal lamps
Cleaning lenses 336
Replacing bulbs 410, 413
Turn signals 25, 57
Exterior rear view mirrors 410, 413
Front bulbs 410
Indicator lamps 27
Rear bulbs 410
Turning off the engine 64U
Uniform Tire Quality Grading
Standards 325
Units
Setting speedometer units 160
Unlocking the vehicle 38
In an emergency 403
Upholstery
Cleaning 340
Useful features
Floormat* 247
V
Vehicle
Locking 31
Locking in an emergency 405
Minimum distance (Parktronic*) 235
Towing 434
Unlocking 31
Unlocking in an emergency 403