2007 MERCEDES-BENZ SLR CLASS octane

17 Introduction
Operator’s Manual
Operating your vehicle outside the USA
or Canada
If you plan to operate your vehicle in for-
eign countries, please be aware that:

service facilities or replacement parts
may not be readily available,

unleaded gasoline for vehicles with cat-
alytic converters may not be available;
the use of leaded fuels will damage the
catalysts,

gasoline may have a considerably low-
er octane rating, and improper fuel can
cause engine damage.Mercedes-Benz SLR McLaren
compliance
The Mercedes-Benz SLR McLaren vehicle
does not comply with the state certifica-
tion regulations of select states. It is not
permitted to register the vehicle in such
states. Check with an authorized
Mercedes-Benz Center for details.

247 Operation
At the gas station
At the gas station
Refueling
The fuel filler flap is located on the
right-hand side of the vehicle towards the
rear. Locking/unlocking the vehicle with
the SmartKey automatically locks/unlocks
the fuel filler flap.
Remove the SmartKey from the starter
switch.
Open the fuel filler flap by pushing at
the point indicated by arrow.
The fuel filler flap opens.
Turn fuel cap counterclockwise and
hold on to it until possible pressure is
released.
Take off cap and set it in the recess on
the fuel filler flap.
To prevent fuel vapors from escaping
into open air, fully insert filler nozzle
unit.
Only fill your tank until the filler nozzle
unit cuts out – do not top off or
overfill.
Replace fuel cap by turning it clockwise
until it audibly engages.
Warning!G
Gasoline is highly flammable and poisonous.
It burns violently and can cause serious
personal injury.
Never allow sparks, flame or smoking
materials near gasoline!
Turn off the engine before refueling.
Whenever you are around gasoline, avoid
inhaling fumes and skin contact, extinguish
all smoking materials.
Direct skin contact with fuels and the inha-
lation of fuel vapors can damage your
health.
iIn case that the central locking system does
not release the fuel filler flap, or the opening
mechanism is clamping, notify Roadside Assis-
tance or an authorized Mercedes-Benz Center.
iOnly use premium unleaded gasoline with a
minimum Posted Octane Rating of 91 (average
of 96 RON/86 MON). Information on gasoline
quality can normally be found on the fuel pump.
Warning!G
Overfilling of the fuel tank may create
pressure in the system which could cause a
gas discharge. This could cause the gas to
spray back out when removing the fuel
pump nozzle, which could cause personal
injury.


380 Technical data
Engine
ModelMercedes-Benz SLR McLaren
(199.376)1
1The quoted data apply only to the standard vehicle. See an authorized Mercedes-Benz Center for the corresponding data of all special bodies and special equipment.
Mercedes-Benz SLR McLaren 722 Edition
(199.376)1
Engine155155
Mode of operation4-stroke engine, gasoline injection4-stroke engine, gasoline injection
No. of cylinders88
Bore3.82 in (97.00 mm)3.82 in (97.00 mm)
Stroke3.60 in (92.00 mm)3.60 in (92.00 mm)
Total piston displacement331.8 cu in (5439 cm3)331.8 cu in (5439 cm3)
Compression ratio8.8:18.8:1
Output acc. to SAE J 1349617 hp/6500 rpm2
(460 kW/6500 rpm)
2Premium fuel required. Performance may vary with fuel octane rating.
641 hp/6500 rpm2
(478 kW/6500 rpm)
Maximum torque acc. to SAE J 1349575 lb-ft/3250-5000 rpm
(780 Nm/3250-5000 rpm)605 lb-ft/4000 rpm
(820 Nm/4000 rpm)
Maximum engine speed7000 rpm7000 rpm
Firing order1-5-4-2-6-3-7-81-5-4-2-6-3-7-8
Poly-V-belt2415 mm/1244 mm2415 mm/1244 mm

390 Technical data
Fuels, coolants, lubricants, etc.
CapacityFuels, coolants, lubricants, etc.
Cooling systemapprox. 10.6 US qt (10.0 l)MB 325.0 Anticorrosion/Antifreeze
Low temperature cooling system
Mercedes-Benz SLR McLaren
Mercedes-Benz SLR McLaren 722 Edition
approx. 5.3 US qt (5.0 l)
approx. 6.3 US qt (6.0 l)MB 325.0 Anticorrosion/Antifreeze
MB 325.0 Anticorrosion/Antifreeze
Fuel tank
including a reserve of25.6 US gal (97.0 l)
3.2 US gal (12.0 l)Premium unleaded gasoline:
Minimum Posted Octane 91
(Avg. of 96 RON/86 MON)
Air conditioning systemR-134a refrigerant and special PAG lubricant
oil (never R-12)
Windshield washer and headlamp cleaning
system7.4 US qt (7 l)MB Windshield Washer Concentrate1
1Use MB Windshield Washer Concentrate “MB SummerFit” and water for temperatures above freezing or MB Windshield Washer Concentrate “MB SummerFit” and
commercially available premixed windshield washer solvent/antifreeze for temperatures below freezing. Follow suggested mixing ratios (page 397).

392 Technical data
Fuels, coolants, lubricants, etc.
Brake fluid
Only brake fluid approved by
Mercedes-Benz is recommended. Your
authorized Mercedes-Benz Center will
provide you with additional information.Premium unleaded gasoline
Warning!G
During vehicle operation, the boiling point of
the brake fluid is continuously reduced
through the absorption of moisture from the
atmosphere. Under extremely strenuous
operating conditions, this moisture content
can lead to the formation of bubbles in the
system, thus reducing the system’s
efficiency.
Therefore, the brake fluid must be replaced
regularly. Refer to your vehicle’s Mainte-
nance Booklet for replacement interval.
Warning!G
Gasoline is highly flammable and poisonous.
It burns violently and can cause serious
personal injury.
Never allow sparks, flame or smoking
materials near gasoline!
Turn off the engine before refueling.
Whenever you are around gasoline, avoid
inhaling fumes and skin or cloth contact,
extinguish all smoking materials.
Direct skin contact with fuels and the
inhalation of fuel vapors can damage your
health.
!To maintain the engine’s durability and per-
formance, premium unleaded gasoline must be
used. If premium unleaded is not available and
low octane fuel is used, follow these precau-
tions:

Have the fuel tank only partially filled with
unleaded regular gasoline and fill up with
premium unleaded gasoline as soon as
possible.

Avoid full throttle driving and abrupt acceler-
ation.

Do not exceed an engine speed of 3000 rpm
if the vehicle is loaded with a light load such
as two persons and no luggage.

Do not exceed 2/3 of maximum accelerator
pedal position if the vehicle is fully loaded or
operating in mountainous terrain.

393 Technical data
Fuels, coolants, lubricants, etc.
Fuel requirements
Only use premium unleaded fuel:

The octane number (posted at the
pump) must be 91 min. It is an average
of both the Research Octane Number
(RON) and the Motor Octane Number
(MON): (RON+MON)/2. This is also
known as the ANTI-KNOCK INDEX.
Unleaded gasoline containing oxygenates
such as ethanol, IPA, IBA and TBA can be
used provided the ratio of any one of these
oxygenates to gasoline does not exceed
10%; MTBE must not exceed 15%.
The ratio of methanol to gasoline must not
exceed 3% plus additional cosolvents.
Using mixtures of ethanol and methanol is
not allowed. Gasohol, which contains
10% ethanol and 90% unleaded gasoline,
can be used.
These blends must also meet all other fuel
requirements, such as resistance to spark
knock, boiling range, vapor pressure, etc.
Gasoline additives
A major concern among engine
manufacturers is carbon build-up caused
by gasoline. Mercedes-Benz recommends
only the use of quality gasoline containing
additives that prevent the build up of
carbon deposits.
After an extended period of using fuels
without such additives, carbon deposits
can build up especially on the intake valves
and in the combustion area, leading to
engine performance problems such as:

Warm-up hesitation

Unstable idle

Knocking/pinging

Misfire

Power lossIn areas where carbon deposits may be
encountered due to lack of availability of
gasolines which contain these additives,
Mercedes-Benz recommends the use of
additives approved by us for use on
Mercedes-Benz vehicles. Refer to Factory
Approved Service Products pamphlet
(USA only) or contact an authorized
Mercedes-Benz Center for a listing of
approved product(s). Follow directions on
product label.
Do not blend other fuel additives with fuel.
This only results in unnecessary cost and
may be harmful to engine operation.
!Damage or malfunction resulting from poor
fuel quality or from blending additional fuel
additives other than those tested and approved
by us for use on Mercedes-Benz vehicles are not
covered by the Mercedes-Benz Limited
Warranty.
For a listing of approved products, refer to the
Factory Approved Service Products pamphlet
(USA only) or contact an authorized
Mercedes-Benz Center.

401 Technical terms
Instrument cluster
The displays and indicator/warning
lamps in the driver’s field of vision, in-
cluding the tachometer, speedometer,
engine temperature and fuel gauge.
Kickdown
Depressing the accelerator past the
point of resistance shifts the transmis-
sion down to the lowest possible. This
very quickly accelerates the vehicle
and should not be used for normal
acceleration needs.
Kilopascal (kPa)
(
page 285)
Maximum load rating
(
page 285)
Maximum loaded vehicle weight
(
page 285)
Maximum tire inflation pressure
(
page 285)MON
(M
otor Octane Number)
The Motor Octane Number for gasoline
as determined by a standardized
method. It is an indication of a gaso-
line's ability to resist undesired detona-
tion (knocking). The average of both
the MON (Motor Octane Number) and
RON (Research Octane Number) is
posted at the pump, also known as
ANTI-KNOCK INDEX.
Multifunction display
Two display fields in the instrument
cluster used to present information
provided by the control system.
Multifunction steering wheel
Steering wheel with buttons for
operating the control system.
Normal occupant weight
(
page 285)OCS
(O
ccupant Classification System)
The system automatically turns the
front passenger front air bag on or off
based on the classified occupant size
category determined by weight sensor
readings from the seat.
Overspeed range
Engine speeds within the red marking
on the tachometer dial. Avoid this
engine speed range, as it may result in
serious engine damage that is not
covered by the Mercedes-Benz Limited
Warranty.
Poly-V-belt drive
Drives engine-components (alternator,
AC compressor, etc.) from the engine.

402 Technical terms
Power train
Collective term designating all compo-
nents used to generate and transmit
motive power to the drive axles,
including

engine

clutch/torque converter

transmission

transfer case

drive shaft

differential

axle shafts/axles
Production options weight
(
page 285)
Program mode selector switch
Used to switch the automatic trans-
mission between sport operation (S),
comfort operation (C) and manual
operation (MAN).
PSI
(P
ounds per square inch)
(
page 285)Recommended tire inflation pressure
(
page 285)
REST
(Residual Engine Heat Utilization)
Feature that uses the engine heat
stored in the coolant to heat the vehi-
cle interior for a short time after the
engine has been turned off.
Rim
(
page 285)
RON
(R
esearch Octane Number)
The Research Octane Number for gaso-
line as determined by a standardized
method. It is an indication of a gaso-
line’s ability to resist undesired detona-
tion (knocking). The average of both
the MON (Motor Octane Number) and
RON (Research Octane Number) is
posted at the pump, also known as
ANTI-KNOCK INDEX.Electro-hydraulic brake system
Electronically controlled hydraulic
braking system for increased braking
safety and comfort.
Shift lock
When the vehicle is parked, this lock
prevents the gear selector lever from
being inadvertently moved out of park
position P without SmartKey turned
and brake pedal depressed.
Sidewall
(page 285)
SRS
(S
upplemental Restraint System)
Seat belts, emergency tensioning de-
vice and air bags. Though independent
systems, they are closely interfaced to
provide effective occupant protection.