2008 SMART FORTWO COUPE technical data

Service fluids and capacities
>> Technical data.
305 Engine oils
Engine oils are specifically tested for their
suitability in our engines and durability for
our service intervals. Therefore, only use
engine oils and oil filters required for vehi

cles with Maintenance System. For a listing of
approved engine oils and oil filters contact an
authorized smart center.!
Using engine oils and oil filters of specifi

cation other than those expressly required
for the Maintenance System, or changing of oil
and oil filter at change intervals longer than
those called for by the Maintenance System
will result in engine or emission control
system damage not covered by the smart
Limited Warranty.
Please follow Maintenance System recommen

dations for scheduled oil changes. Failure to
do so will result in engine or emission control
system damage not covered by the smart
Limited Warranty.
Engine oil additives!
Do not blend oil additives with engine oil.
They may damage the engine.
Damage or malfunctions resulting from
blending oil additives are not covered by the
smart Limited Warranty. Any authorized smart
center will provide you with additional infor

mation.
Air conditioning refrigerantR
134a (HFC) refrigerant and special PAG
lubricating oil are used in the air conditioning
system.!
Never use R
12 (CFC) or mineral
based
lubricating oil. Otherwise damage to the sys

tem will occur.
Brake fluidOnly brake fluid approved by smart is recom

mended. Any authorized smart center will
provide you with additional information.G
Warning!
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 condi

tions, 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 re

placed regularly. Refer to your vehicle’s
Maintenance Booklet for replacement
interval.

Service fluids and capacities
306
>> Technical data.
Premium unleaded gasoline
!
To maintain the engine’s durability and
performance, premium unleaded gasoline
must be used. If premium unleaded gasoline is
not available and low octane fuel is used,
follow these precautions:
• 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
acceleration.
• Do not exceed an engine speed of 3 000 rpm
if the vehicle is loaded with a light load such
as two persons and no cargo.
•Do not exceed
2/3 of maximum accelerator
pedal position if the vehicle is fully loaded
or operating in mountainous terrain.
Fuel requirementsOnly use premium unleaded fuel:
• The octane number (posted at the pump)
must be 91 min.
It is an average of both the R
esearch
O
ctane N
umber (RON) and the M
otor O
ctane
N
umber (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.
G
Warning!
Gasoline is highly flammable and poison

ous. 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 clothing
contact, extinguish all smoking materials.
Direct skin contact with fuels and the
inhalation of fuel vapors are damaging to
your health.

Service fluids and capacities
>> Technical data.
307 Gasoline additives
A major concern among engine manufacturers
is carbon build
up caused by gasoline. smart
recommends only the use of quality gasoline
containing additives that prevent the build

up of carbon deposits.
After an extended period of using fuels with

out such additives carbon deposits can build
up, especially on the intake valves and in the
combustion area, leading to engine perfor

mance 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,
smart recommends the use of additives
approved by us for use on smart vehicles.
Contact an authorized smart center for a list

ing of approved product(s). Follow directions
on product label.Do not blend other fuel additives with fuel.
This only results in unnecessary costs and
may be harmful to the 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 smart vehicles are
not covered by the smart Limited Warranty.

Service fluids and capacities
308
>> Technical data.
Windshield/rear window
1 washer
system
During all seasons,
• use a windshield washer concentrate for
summer and water for temperatures above
freezing point.
• use a windshield washer concentrate label
for winter and water for temperatures be

low freezing point.
>Premix the windshield washer fluid in a suit

able container depending on the outside
temperature and in accordance with the
manufacturer’s instructions
2.Mixing ratios:
• above 32°F (0°C): 1 part windshield washer
concentrate labeled for summer to
100 parts water
• 14°F (
10°C): 1 part windshield washer
concentrate labeled for winter to 2 parts
water
•
4°F (
20°C): 1 part windshield washer
concentrate labeled for winter to 1 part
water
1coupé
only
2 Refer to the notes for use on the container
G
Warning!
Windshield washer concentrate is highly
flammable. Fire, naked flames and
smoking are prohibited when windshields
washer concentrate is being handled.

Service fluids and capacities
>> Technical data.
309 Coolants
The engine coolant is a mixture of water and
anticorrosion/antifreeze, which provides:
• Corrosion protection
• Freeze protection
• Boiling protection (by increasing the
boiling point)
The cooling system was filled at the factory
with a coolant providing freeze protection to
approximately
35°F (
37°C) and corrosion
protection.!
Add premixed coolant solution only.
Adding water and MB 325.0 Anticorrosion/An

tifreeze separately from each other, could
cause engine damage not covered by the
smart Limited Warranty.
If the antifreeze mixture is effective to
35°F
(
37°C), the boiling point of the coolant in the
pressurized cooling system is reached at
approximately 266°F (130°C).The coolant solution must be used year round,
even in countries which have high tempera

tures to provide the necessary corrosion
protection and increase boiling protection.
Refer to Maintenance/ Service Booklet for re

placement interval.
Coolant system design and coolant used
determine the replacement interval. The
replacement interval published in the Mainte

nance booklet is only applicable if MB 325.0
Anticorrosion/Antifreeze solution or other
smart approved products of equal specifica

tion are used to renew the coolant concentra

tion or bring it back up to the proper level.
For information on other smart approved
products of equal specification, contact an
authorized smart center.
To provide important corrosion protection,
the solution must be at least 50% anticorro

sion/antifreeze (equivalent to freeze protec

tion to approximately
35°F [
37°C]).If you use a solution that is more than 55%
anticorrosion/antifreeze (freeze protection
to approximately
49°F [
45°C]), the engine
temperature will increase due to the lower
heat transfer capability of the solution.
Therefore, do not use more than this amount
of anticorrosion/antifreeze.
If the coolant level is low, water and MB 325.0
Anticorrosion/Antifreeze should be used to
bring it up to the proper level (have cooling
system checked for signs of leakage). Please
make sure the mixture is in accordance with
label instructions.
Always use anticorrosion/antifreeze that have
been approved by smart. For information
contact an authorized smart center.
The water in the cooling system must meet
minimum requirements, which are usually
satisfied by normal drinking water. If you are
not sure about the water quality, consult an
authorized smart center.

Service fluids and capacities
310
>> Technical data. Anticorrosion/antifreeze
Your vehicle contains a number of aluminum
parts. The use of aluminum components in
motor vehicle engines necessitates that
anticorrosion/antifreeze coolant used in such
engines be specifically formulated to protect
the aluminum parts.Failure to use such anticorrosion/antifreeze
coolant will result in a significantly shortened
service life.
Therefore, the following product is strongly
recommended for use in your vehicle: MB
325.0 Anticorrosion/Antifreeze agent.Before the start of the winter season (or once
a year in hot southern regions), you should
have the anticorrosion/antifreeze concentra

tion checked. The coolant is also regularly
checked each time you bring your vehicle to
an authorized smart center for service.
Anticorrosion/antifreeze quantity:
Approximate freeze protection
35°F (
37°C)

49°F (
45°C)
All models
2.27 US qt (2.15 l)
2.45 US qt (2.32 l)

>> Technical data.
311