maintenance SMART FORTWO COUPE 2008 Owner's Manual

Engine electronics
290
>> Technical data.
Work on engine electronics
!
Always have maintenance work on the en

gine electronics and components, such as
control modules, sensors and connecting ca

bles, performed by a qualified specialist who
has the necessary knowledge and tools to
carry out the work required, e.g. at a smart
center. Otherwise there is a danger that vehi

cle components may wear more rapidly, which
may void the vehicle’s warranty.
Retrofitting electrical and elec

tronic devicesElectrical and electronic devices can endan

ger vehicle operating safety.!
Damage or consequential damage due to
retrofitting a device in the vehicle is not co

vered by smart's warranty.
If you install telephones or radio transmitters
in the vehicle you must have such retrofits ap

proved. smart approves the installation of
telephones and radio devices if the work is
done professionally and the device is con

nected to a low
reflection exterior antenna.
G
Warning!
Always have maintenance work on engine
electronics and components performed
by a qualified specialist, e.g. at a smart
center. In particular, work relevant to
safety or on safety related systems must
be carried out at a qualified specialist
workshop.

Rims and tires
298
>> Technical data.
!
Only use tires which have been tested and
approved by smart. Tires approved by smart
are developed to provide best possible
performance in conjunction with the driving
safety systems on your vehicle such as ABS
or ESP
®.
Using tires other than those approved by
smart may result in damage that is not
covered by the smart Limited Warranty.
!
Using tires other than those approved by
smart can have detrimental effects, such as
• poor handling characteristics
• increased noise
• increased fuel consumption
Moreover, tires and rims not approved by
smart may, under load, exhibit dimensional
variations and different tire deformation
characteristics that could cause them to come
into contact with the vehicle body or axle
parts. Damage to the tires or the vehicle may
be the result.
i
Further information on tires and rims is
available at any authorized smart center.
A placard with the recommended tire inflation
pressure is located on the driver’s door
B
pillar (

page 185).
The tire inflation pressure should be checked
regularly and should only be adjusted on cold
tires. Follow tire manufacturer’s maintenance
recommendation included with vehicle.

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
>> 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.