2012 MERCEDES-BENZ SLS AMG ROADSTER cooling

Defrosting the windows
Windows fogged up on the insideXActivate the cooling with air
dehumidification function.XActivate automatic mode.XIf the windows continue to fog up, activate
the defrosting function.
Windows fogged up on the outside
XActivate the windshield wipers.XPress the _ button repeatedly until the
O or P symbol appears in the
display.
i You should only select this setting until
the windshield is clear again.
Rear window defroster
Activating/deactivating
GWARNING
Any accumulation of snow and ice should be
removed from the rear window before driving.
Visibility could otherwise be impaired,
endangering you and others.
The rear window defroster has a high current
draw. You should therefore switch it off as
soon as the window is clear. It otherwise
switches off automatically after several
minutes.
If the battery voltage is too low, the rear
window defroster may switch off.
XSelect SmartKey position 2 with the Start/
Stop button.XPress the ¤ button.
The indicator lamp in the ¤ button lights
up or goes out.Problems with the rear window
defroster
The rear window defroster has deactivated
prematurely or cannot be activated. The on-
board voltage is too low because too many
electrical consumers are switched on.
XSwitch off any consumers that are not
required, e.g. seat heating or interior
lighting.
When the battery is sufficiently charged,
the rear window defroster is activated
again automatically.
Activating/deactivating air-
recirculation mode
You can deactivate the flow of fresh air if
unpleasant odors are entering the vehicle
from outside. The air already inside the
vehicle will then be recirculated.
GWARNING
Fogged windows impair visibility,
endangering you and others. If the windows
begin to fog on the inside, switching off the
air recirculation mode immediately should
clear interior window fogging. If interior
window fogging persists, make sure the air
conditioning is activated, or press the ¬
button.
XSelect SmartKey position 2 with the Start/
Stop button.XTo activate: press the g button.
The indicator lamp in the g button lights
up.
i Air-recirculation mode is activated
automatically at high outside
temperatures. When air-recirculation mode
is activated automatically, the indicator
lamp in the g button is not lit.
Outside air is added after about 30
minutes.
Operating the climate control system109Climate controlZ

XTo switch off: press the g button.
The indicator lamp in the g button goes
out.
i Air-recirculation mode deactivates
automatically:
R after approximately five minutes if
outside temperatures are less than about
41 ‡ (5 †)
R after approximately five minutes if
cooling with air dehumidification is
deactivated
R after approximately 30 minutes if outside
temperatures are over about
41 ‡ (5 †)
Setting the air vents
Important safety notes
GWARNING
When operating the climate control, the air
that enters the passenger compartment
through the air vents can be very hot or very
cold (depending on the set temperature). This
could cause burns or frostbite to unprotected
skin in the immediate area of the air vents.
Always keep sufficient distance between
unprotected parts of the body and the air
vents. If necessary, use the air distribution
adjustment to direct the air to air vents in the
vehicle interior that are not in the immediate
area of unprotected skin.
In order to ensure the direct flow of fresh air
through the air vents into the vehicle interior,
please observe the following notes:
R keep the air inlet on the right-hand side of
the hood free of blockages, such as ice,
snow or leaves.
R never cover the air vents or air intake grilles
in the vehicle interior.
i For virtually draft-free ventilation, adjust
the sliders of the air vents to the center
position.
Setting the center air vents1To open the center air vent2To close the center air vent=Center air vent, right?Center air vent, leftXTo open the center air vent: turn the
adjuster in center air vent = or ? in the
direction of the arrow to position 1.XTo close the center air vent: turn the
adjuster in center air vent = or ? in the
direction of the arrow to position 2.
Setting the side air vents
1To open the side air vent2To close the side air vent=Side window defroster vent?Side air vent110Setting the air ventsClimate control

Display messagesPossible causes/consequences and M Solutions#The battery is not being charged.
A warning tone also sounds.
Possible causes are:
R a defective alternator
R a torn poly-V-belt
R a malfunction in the electronicsXPull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.XOpen the hood.XCheck whether the poly-V-belt is torn.
If the poly-V-belt is torn:
! Do not continue driving. The engine could otherwise overheat.
XConsult a qualified specialist workshop.
If the poly-V-belt is not damaged:
XVisit a qualified specialist workshop.+
Check Coolant
Level See
Operator's ManualThe coolant level is too low.Xadd coolant, observing the warning notes before doing so
( Y page 220).XIf coolant needs to be added more often than usual, have the
engine coolant system checked at a qualified specialist
workshop.
! The coolant level is too low. Avoid making long journeys with
too little coolant in the cooling system. The engine will otherwise
be damaged.
The display messages and the corresponding symbol that
indicate that the coolant level is too low must not be ignored.
4
Engine Oil Level
low Stop Vehicle
Turn Engine OffThere is insufficient oil in the engine. There is a risk of engine
damage.XPull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.XTop up and check the engine oil level ( Y page 219).178Displays and operationOn-board computer and displays

Display messagesPossible causes/consequences and M Solutionsd
Stop Engage PThe transmission is faulty. The vehicle loses drive and rolls to a
standstill.XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.XMake sure that the electric parking brake is applied.XPrevent the vehicle from rolling away before you leave it
( Y page 236).XConsult a qualified specialist workshop.d
Transmission oil
cooling
MalfunctionThe transmission coolant pump is faulty. The transmission may
overheat.XIn the on-board computer, select the AMG menu and check the
transmission oil temperature.XAvoid excessive loading, e.g. due to dynamic driving.XAt transmission oil temperatures under 248 ‡(120 †), drive to
the nearest qualified specialist workshop.d
Trans. oil
overheated Drive
on with careThe transmission oil has overheated.
Manual drive program M and shift range restriction are no longer
available. Only drive program C is still available. The engine output
is reduced according to the degree of overheating.XAllow the transmission oil to cool by adopting a defensive driving
style.188Displays and operationOn-board computer and displays

Adding engine oilHEnvironmental note
When adding oil, take care not to spill any. If
oil enters the soil or waterways, it is harmful
to the environment.
! Use only engine oils and oil filters that
have been approved for vehicles equipped
with a service system. A list of the engine
oils and oil filters tested and approved in
accordance with the Mercedes-Benz
Specifications for Service Products can be
called up by visiting http://
www.mbusa.com (USA only). More
information about tested and approved
engine oils and oil filters is available from
any authorized Mercedes-Benz Center.
Damage to the engine or exhaust system is
caused by the following:
R using engine oils and oil filters which
have not been specifically approved for
the service system.
R replacing the engine oil or oil filter after
the replacement interval required by the
service system has elapsed
R using engine oil additives.
XUnscrew and remove oil filler cap : with
the integrated dipstick.XAdd the amount of oil required.
! Do not add too much oil. If the oil level is
above the "max" mark on the dipstick, too
much oil has been added. This can lead to
damage to the engine or the catalytic
converter. Have excess oil siphoned off.
XReplace cap : on the filler neck and
tighten clockwise.
Ensure that the cap locks into place
securely.
You will find further information about engine
oil in the "Technical data" section
( Y page 282).
Checking and adding other service
products
Checking the coolant level
GWARNING
In order to avoid any potentially serious burns:
R use extreme caution when opening the
hood if there are any signs of steam or
coolant leaking from the cooling system, or
if the coolant temperature display indicates
that the coolant is overheated.
R do not remove the pressure cap on the
coolant reservoir if the coolant temperature
is above 158 ‡ (70 †). Allow the engine to
cool down before removing the cap. The
coolant reservoir contains hot fluid and is
under pressure.
R using a rag, slowly turn the cap
approximately 1
/ 2 turn to relieve excess
pressure. If opened immediately, scalding
hot fluid and steam will be blown out under
pressure.
R do not spill antifreeze on hot engine parts.
Antifreeze contains ethylene glycol which
may burn if it comes into contact with hot
engine parts.
Only check the coolant level when the vehicle
is on a level surface and the engine has cooled
down.
XSet the Start/Stop button to key position
2 .XCheck the coolant temperature display in
the "AMG" menu ( Y page 160).
The coolant temperature must be below
158 ‡ (70 †).220Engine compartmentMaintenance and care

Filling capacitiesCapacityFuel, coolant, lubricants,
etc.Engine oil and filter8.43 US qt (7.98 l)Approved engine oilsAMG SPEEDSHIFT DCT 7-
speed sports
transmission, hydraulic
chamber7.4 US qt (7.0 l)
+ 0.85 US qt (0.8 l) for oil
cooler and hose lines at the
first fillingShell DCT F.3AMG SPEEDSHIFT DCT 7-
speed sports
transmission, gear set,
drive set and differential
chamber3.06 US qt (2.9 l)
+ 0.87 US qt (0.82 l) for oil
cooler and hose lines at the
first fillingShell GL.5Power steering1.26 US qt (1.2 l)Chevron Texaco CHF 9109Brake systemApproximately 0.53 US qt
(0.5 l)MB Brake Fluid (DOT 4+)Cooling systemApproximately 11.6 US qt
(11.0 l)MB 325.0 corrosion
inhibitor/antifreeze agentTank capacity22.5 US gal (85.0 l)Premium-grade unleaded
gasoline (at least 91 octane,
average value between
96 RON/86 MON)ReserveApproximately 3.7 US gal
(14.0 l)Automatic climate control—Refrigerant R134a and
special PAG lubricant (never
R 12)Windshield/headlamp
cleaning system6.3 US qt (6.0 l)MB windshield washer
concentrate 20
(Y page 284)
Mixing ratio for washer fluid
( Y page 284)Fuel
Important safety notesGWARNING
Gasoline is highly flammable and poisonous.
It burns violently and can cause serious
personal injury.
Never allow sparks, flames or smoking
materials near gasoline.
Turn off the engine before refueling.
Whenever you are around gasoline, avoid
inhaling fumes and any skin or clothing
contact.20 Mixed with water or premixed washer fluid with antifreeze protection.280Service products and filling capacitiesTechnical data

If the boiling point of the brake fluid is too low,
vapor pockets may form in the brake system
when the brakes are applied hard (e.g. when
driving downhill). This would impair braking
efficiency.
You should have the brake fluid renewed at
regular intervals. The brake fluid change
intervals can be found in the Maintenance
Booklet.
Only use brake fluid approved by Mercedes-
Benz. Information about approved brake
fluids can be obtained from any authorized
Mercedes-Benz Center.
Coolant
Important safety notes
The coolant is a mixture of water and
antifreeze/corrosion inhibitor. It performs
the following tasks:
R anti-corrosion protection
R antifreeze protection
R raising the boiling point
The engine cooling system is filled at the
factory with coolant which contains an
antifreeze/corrosion inhibitor that ensures
protection down to approximately Ò35 ‡
( Ò 37 †).
! Only add coolant that has been premixed
with the desired antifreeze protection. You
could otherwise damage the engine.
Further information on coolants and on
filling can be found in the Mercedes-Benz
Specifications for Service Products, MB
Approval 310.1, e.g. on the Internet at
http://bevo.mercedes-benz.com . You can
also consult an authorized Mercedes-Benz
Center.
If the coolant has antifreeze protection down
to Ò35 ‡ ( Ò37 †), the boiling point of the
coolant in the pressurized system is
approximately 266 ‡ (130 †).
Your vehicle has a range of aluminum
components. Aluminum components in the
engine make it necessary to use
anticorrosion/antifreeze coolant which has
been specifically formulated to protect the
aluminum parts. Using other antifreeze/
corrosion inhibitors without these
characteristics affects the service life.
The coolant must be used throughout the year
in order to maintain the necessary corrosion
protection and provide protection from
overheating. In the Maintenance Booklet, you
can find information on the intervals for
renewal.
The renewal interval is determined by the
coolant type and the engine cooling system
design. The renewal interval in the
Maintenance Booklet is only valid if the
coolant is renewed or replenished with
Mercedes-Benz approved products.
Therefore, only use MB 325.0 antifreeze/
corrosion inhibitor or another Mercedes-Benz
approved product of the same specification.
Information on other products with the same
specifications that are approved by
Mercedes-Benz can be obtained at an
authorized Mercedes-Benz Center or on the
Internet at
http://bevo.mercedes-benz.com .
The coolant is checked at every maintenance
interval at an authorized Mercedes-Benz
Center.
The antifreeze/corrosion inhibitor
concentration in the engine cooling system
should:
R be at least 50%. This will protect the engine
cooling system against freezing down to
approximately Ò35 ‡ ( Ò37 †).
R not exceed 55% (antifreeze protection to
-49 ‡ [-45 † ]); otherwise, heat will not
dissipate as effectively.
If the coolant level is too low, MB 325.0
antifreeze/corrosion inhibitor should be
added. Have the engine cooling system
checked for possible leaks.Service products and filling capacities283Technical dataZ

The water in the engine cooling system must
meet minimum requirements, which are
usually satisfied by normal drinking water. If
you are unsure about the water quality,
contact an authorized Mercedes-Benz
Center.
Windshield/headlamp cleaning
system
GWARNING
Washer solvent/antifreeze is highly
flammable. Do not spill washer solvent/
antifreeze on hot engine parts, because it may
ignite and burn. You could be seriously
burned.
Use MB SummerFit windshield washer
concentrate at temperatures above freezing:
XMix 1 part MB SummerFit to 100 parts
water (1.34 fl oz[40 ml] to 1 gal[4.0 l]
water).
Use freely available premixed windshield
washer concentrate at temperatures below
freezing:
XMix 1 part MB SummerFit to 100 parts
windshield washer concentrate
(1.34 fl oz[40 ml] to 1 gal[4.0 l] windshield
washer concentrate).
Vehicle data, Coupe
The data stated here specifically refers to a
vehicle with standard equipment. Consult an
authorized Mercedes-Benz Center for the
data for all vehicle variants and trim levels.
Vehicle dimensionsVehicle length182.7 in (4640 mm)Vehicle width
including exterior
mirrors81.7 in (2075 mm)Vehicle height49.7 in (1262 mm)Vehicle dimensionsWheelbase105.5 in (2680 mm)Front track66.2 in (1682 mm)Rear track65.0 in (1651 mm)Ground clearance3.9 in (99 mm)Turning circle39.0 ft (11.9 m)Vehicle weightMaximum trunk
load137 lb (62 kg)
Vehicle data, Roadster
The data stated here specifically refers to a
vehicle with standard equipment. Consult an
authorized Mercedes-Benz Center for the
data for all vehicle variants and trim levels.
Vehicle dimensionsVehicle length182.7 in (4640 mm)Vehicle width
including exterior
mirrors81.7 in (2075 mm)Vehicle height49.6 in (1261 mm)Wheelbase105.5 in (2680 mm)Front track66.2 in (1682 mm)Rear track65.0 in (1651 mm)Ground clearance3.9 in (99 mm)Turning circle39.0 ft (11.9 m)Vehicle weightMaximum trunk
load137 lb (62 kg)284Vehicle data, RoadsterTechnical data