warning MERCEDES-BENZ SLR CLASS 2007 Owners Manual

287 Operation
Tires and wheels
Rotating tires
Tire rotation can be performed on vehicles
with tires of the same dimension all
around. If your vehicle is equipped with
tires of the same dimension all around,
tires can be rotated, observing a
front-to-rear rotation pattern that will
maintain the intended rotation (spinning)
direction of the tire (
page 261).In some cases, such as when your vehicle
is equipped with mixed-size tires (different
tire dimension front vs. rear), tire rotation
is not possible.
If applicable to your vehicle’s tire configu-
ration, tires can be rotated according to
the tire manufacturer’s recommended in-
tervals in the tire manufacturer’s warranty
pamphlet located in your vehicle literature
portfolio. If none is available, tires should
be rotated every 3 000 to 6 000 miles
(5 000 to 10 000 km), or sooner if neces-
sary, according to the degree of tire wear.
The same rotation (spinning) direction
must be maintained (
page 261).
Rotate tires before the characteristic tire
wear pattern becomes visible (shoulder
wear on front tires and tread center wear
on rear tires).
Thoroughly clean the mounting face of
wheels and brake disks, i.e. the inner side
of the wheels/tires, during each rotation.
Check for and ensure proper tire inflation
pressure.For information on wheel change, see the
“Practical hints” section (
page 362).
!A wheel change should only be carried out
at an authorized Mercedes-Benz Center. Other-
wise there is a danger of damaging the vehicle by
jacking it up incorrectly.
Warning!G
Rotate front and rear wheels only if the tires
are of the same dimension.
If your vehicle is equipped with mixed-size
tires (different tire dimensions front vs.
rear), tire rotation is not possible.
Warning!G
Have the tightening torque checked after
changing a wheel. Wheels could become
loose if not tightened with a torque of
95 lb-ft (130 Nm).
Only use Genuine Mercedes-Benz wheel
bolts specified for your vehicle’s rims.

288 Operation
Tires and wheels
Anti-theft wheel nuts
Your vehicle is equipped with anti-theft
wheel nuts that prevent the theft of your
vehicle’s wheels.
1Anti-theft wheel nut
2Wheel nut keyRemoving anti-theft wheel nuts
Unscrew anti-theft wheel nut1 using
wheel nut key2.
Replace anti-theft wheel nut1 with
one of the regular wheel bolts.
Fasten the wheel bolt and tighten it
with a torque wrench to a tightening
torque of 95 lb-ft (130 Nm).Warning!G
Pull the parking brake lever up as many
notches as possible and move the gear se-
lector lever to park positionP, before loos-
ening the wheel bolts. Otherwise the vehicle
may move and cause an accident and/or
serious personal injury.
!Do not use air tools, such as an impact
wrench, when installing or removing the
anti-theft wheel nuts. An impact wrench can
damage the anti-theft wheel nuts and the wheel
nut key, or cause them to malfunction.
!Store wheel bolts and anti-theft wheel nuts
not currently in use in a safe place to avoid
damage to the threads.
Warning!G
The wheels could come loose if the wheel
bolts are not tightened to a torque of 95 lb-ft
(130 Nm). Have the tightening torque
checked after changing a wheel.

289 Operation
Tires and wheels
Fitting anti-theft wheel nuts
Unscrew a wheel bolt from one of the
wheels.
Replace that wheel bolt with one of the
anti-theft wheel nuts1 delivered with
your vehicle.
Fasten anti-theft wheel nut1 using
wheel nut key2 and tighten with a
torque wrench to a tightening torque of
95 lb-ft (130 Nm).
Warning!G
The wheels could come loose if the wheel
bolts are not tightened to a torque of 95 lb-ft
(130 Nm). Have the tightening torque
checked after changing a wheel.
iKeep the anti-theft wheel nut key in a conve-
nient place in your vehicle where you and service
personnel can always find it easily when it is
needed.
iIf you should lose the anti-theft wheel nut
key or one of the anti-theft wheel nuts, please
contact an authorized Mercedes-Benz Center for
a replacement.

290 Operation
Winter driving
Before the onset of winter, have your
vehicle winterized at an authorized
Mercedes-Benz Center. This service
includes:

Check of anticorrosion and antifreeze
concentration.

Addition of cleaning concentrate to the
water of the windshield and headlamp
cleaning system. Add MB Concentrate
“MB Summerfit” to a premixed wind-
shield washer solvent/antifreeze
which is formulated for below freezing
temperatures (
page 397).

Battery test. Battery capacity drops
with decreasing ambient temperature.
A well charged battery helps to make
sure that the engine can be started,
even at low ambient temperatures.

Tire change. Mercedes-Benz recom-
mends M+S rated radial-ply tires with a
minimum tread depth of approximately
1/6in (4 mm) on all four wheels for the
winter season.
Winter tires*
Always use winter tires at temperatures
below 45°F (7°C) and whenever wintry
road conditions prevail. Not all M+S rated
tires provide special winter performance.
Make sure the tires you use show the
mountain/snowflake.marking on the
tire sidewall. These tires meet specific
snow traction performance requirements
of the Rubber Manufacturers Association
(RMA) and the Rubber Association of Can-
ada (RAC) and have been designed specif-
ically for use in snow conditions. Use of
winter tires is the only way to achieve the
maximum effectiveness of the ABS and
ESP
® in winter operation.
For safe handling, make sure that all
mounted winter tires are of the same make
and have the same tread design.Always observe the speed rating of the
winter tires installed on your vehicle. If the
maximum speed for which your tires are
rated is below the speed rating of your
vehicle, you must place a notice to this
effect where it will be seen by the driver.
Such notices are available from your tire
dealer or from any authorized
Mercedes-Benz Center.
!A wheel change should only be carried out
at an authorized Mercedes-Benz Center. Other-
wise there is a danger of damaging the vehicle by
jacking it up incorrectly.
Warning!G
Winter tires with a tread depth of less than 1/6in (4 mm) must be replaced. They are no
longer suitable for winter operation.

295 Operation
Vehicle care
Vehicle care
Cleaning and care of the vehicle
If you have any questions about proper
care of your SLR, please contact an
authorized Mercedes-Benz Center.Depending on body color the characteris-
tic carbon structure of the body surface
may become visible due to high ambient
temperatures and humidity. This phenom-
enon is related to the technology and
concept of the vehicle’s body.
While in operation, even while parked, your
vehicle is subjected to varying external
influences which, if gone unchecked, can
attack the paintwork as well as the
underbody and cause lasting damage.
Such damage is caused not only by
extreme and varying climatic conditions,
but also by:

Air pollution

Road salt

Tar

Gravel and stone chipping
To avoid paint damage, you should
immediately remove:

Grease and oil

Fuel

Coolant

Brake fluid

Bird droppings

Insects

Tree resins, etc.
Frequent washing reduces and/or elimi-
nates the aggressiveness and potency of
the above adverse influences.
More frequent washings are necessary to
deal with unfavorable conditions:

near the ocean

in industrial areas (smoke, exhaust
emissions)

during winter operation
You should check your vehicle from time to
time for stone chipping or other damage.
Any damage should be repaired as soon as
possible.
Warning!G
Many cleaning products can be hazardous.
Some are poisonous, others are flammable.
Always follow the instructions on the partic-
ular container. Always open your vehicle’s
doors or windows when cleaning the inside.
Never use fluids or solvents that are not
designed for cleaning your vehicle.
iMercedes-Benz recommends that you use
Mercedes-Benz care products. These have been
specially developed to suit Mercedes-Benz vehi-
cles and are state of the art. Mercedes-Benz
care products are available from any
Mercedes-Benz Center.
!Affixing stickers, magnets, adhesive tape or
similar materials to painted body components
may damage the paintwork.

297 Operation
Vehicle care
Power washer
Cleaning the windows and wiper blades
Remove the SmartKey from the starter
switch.
Fold the wiper arm away from the
windshield (
page 361).
You must feel the wiper arm engage in
position.
Clean the wiper blade inserts with a
clean cloth and detergent solution.
Use a soft, clean cloth and a mild win-
dow cleaning solution on all outside
and inside glass surfaces.
An automotive glass cleaner is
recommended.Cleaning the headlamps
Wipe the headlamp lens with a damp
sponge.
!Do not use power washer to clean your
vehicle or the engine.
!The hood must be opened (page 250) be-
fore folding the wiper arm away from the wind-
shield. You could otherwise damage the hood
and/or the wiper arms.
!Never open or close the hood when the wip-
er arms are folded away from the windshield.
You could otherwise damage the hood and/or
the wiper arm.
Warning!G
For safety reasons, switch off wipers and
remove SmartKey from starter switch
before cleaning the wiper blades. Otherwise
the wiper motor could suddenly turn on and
cause injury.
!Do not pull on the wiper blade inserts. They
could tear.
!To clean the window interior, do not use a
dry cloth, abrasives, solvents or cleaners con-
taining solvents. Do not touch the inside of the
front, rear or side windows with hard objects
such as an ice scraper or ring. Doing so may
damage the windows.
!Fold the windshield wiper arms back onto
the windshield before turning the SmartKey in
the starter switch.
Hold on to the wiper when folding the wiper arm
back. If released, the force of the impact from
the tensioning spring could crack the windshield.
!Only use windshield washer fluid suitable
for plastic lamp lenses. Unsuitable windshield
washer fluid may cause damage to the plastic
lenses of the headlamps.
Do not use

a dry cloth

abrasive products

solvents

cleaning agents containing solvents
You could otherwise scratch or damage the lens
surface.

303 Practical hints
What to do if ...
ProblemPossible cause/consequenceSuggested solutions
3(Canada only)
;(USA only)
The red brake warning lamp
comes on while driving and
you hear a warning sound.
You are driving with the parking brake set.Release the parking brake (page 49).
3(Canada only)
;(USA only)
The red brake warning lamp
comes on while the engine is
running and you hear a
warning sound.
Risk of accident!

There is a malfunction in the
electro-hydraulic brake system.

There is insufficient brake fluid in the
reservoir.
Carefully stop the vehicle in a safe location
or as soon as it is safe to do so and contact
an authorized Mercedes-Benz Center. Do
not add brake fluid! This will not solve the
problem.
Read and observe messages in the
multifunction display (
page 314).
Warning!G
Driving with the brake warning lamp illumi-
nated can result in an accident. Have your
brake system checked immediately if the
brake warning lamp stays on. Do not add
brake fluid before checking the brake
system.
Overfilling the brake fluid reservoir can re-
sult in spilling brake fluid on hot engine
parts and the brake fluid catching fire. You
can be seriously burned.
!If you find that the brake fluid in the brake
fluid reservoir has fallen to the minimum mark or
below, have the brake system checked for brake
pad thickness and leaks.

306 Practical hints
What to do if ...
During severe operating conditions, e.g.
stop-and-go traffic, the coolant tempera-
ture may rise close to 248°F (120°C).
ProblemPossible cause/consequenceSuggested solution
DThe red coolant temperature
warning lamp comes on while
the engine is running.There is insufficient coolant in the reservoir.Immediately add coolant to prevent en-
gine from overheating (
page 255).
If this warning lamp comes on frequently,
there is a leak in the cooling system.Have the cooling system checked by
an authorized Mercedes-Benz Center.
If the coolant level is correct, the electric
radiator fan may be broken. If the coolant temperature is below
248°F (120°C), you can continue driv-
ing to the nearest authorized
Mercedes-Benz Center.
Avoid high engine loads (e.g. driving
uphill) and stop-and-go driving.
DThe red coolant temperature
warning lamp comes on while
the engine is running and you
hear a warning sound.The coolant temperature has exceeded
248°F (120°C).Stop as soon as possible in a safe loca-
tion and allow the engine and coolant
to cool down.
Warning!G
Driving when your engine is overheated can
cause some fluids which may have leaked
into the engine compartment to catch fire.
You could be seriously burned.
Steam from an overheated engine can cause
serious burns which can occur just by open-
ing the engine hood. Stay away from the en-
gine if you see or hear steam coming from it.
Stop the vehicle in a safe location away from
other traffic. Turn off the engine, get out of
the vehicle and do not stand near the vehicle
until the engine has cooled down.
!The engine should not be operated with the
coolant temperature above 248°F (120°C). Do-
ing so may cause serious engine damage which
is not covered by the Mercedes-Benz Limited
Warranty.

307 Practical hints
What to do if ...
ProblemPossible cause/consequenceSuggested solutions
lamp comes on while driving
and you hear a warning
sound.The Airbrake or the central locking system
is malfunctioning.Contact an authorized Mercedes-Benz
Center immediately.
>The red gearshift indicator
lamp comes on while driving.You are driving with the manual shift pro-
gram. The engine is in the overrevving
range.Shift to the next higher gear. Otherwise the
fuel supply will be interrupted to prevent the
engine from overrevving.
AThe yellow fuel reserve warn-
ing lamp comes on while
driving.The fuel level has dropped below the
reserve mark.Refuel at the nearest gas station
(
page 247).
The fuel cap is not closed tightly.Check the fuel cap (page 247).
=The engine oil temperature
indicator comes on in the
tachometer while driving.The engine oil has not yet reached its
operating temperature.Warm up the engine and do not drive at full
power until the operating temperature has
been reached.
The symbol will go out as soon as the engine
oil has reached its operating temperature.

308 Practical hints
What to do if ...
ProblemPossible cause/consequenceSuggested solution
on for a maximum of 6 seconds
after starting the engine.The telltale reminds you and your passenger
to fasten your seat belts before driving off.Fasten your seat belts.
Regardless of whether the seat belts
are fastened or not, the seat belt tell-
tale always comes on and remains lit
for 6 seconds after starting the
engine.
maximum of 6 seconds after
starting the engine.You have forgotten to fasten your seat belt.Fasten your seat belt.
The warning chime stops sounding.
on while the vehicle is standing
still and the engine is running or
during driving.You and/or your passenger have forgotten to
fasten your seat belts.Fasten your seat belts.
The seat belt telltale goes out.
There are items placed on the passenger seat
and therefore the system senses the passen-
ger seat as being occupied.Remove the items from the passenger
seat and put them in a safe place.
The seat belt telltale goes out.