2008 SMART FORTWO COUPE engine

Driving instructions
212
>> Operation
BrakesRefer to the description of the hydraulic
brake assistant (

page 75).
!
Because the ESP
® operates automatically,
the engine must be shut off (key in starter
switch position0) when
• the parking brake is being tested on a
brake test dynamometer
• the vehicle is being towed with the front
axle raised
Active braking action through the
ESP
® may
otherwise seriously damage the brake system
which is not covered by the smart Limited
Warranty.Brake pad wear or a leak in the brake system
may be the reason for low brake fluid level in
the brake fluid reservoir.
The brake fluid level in the brake fluid
reservoir may be too low if the brake warning
lamp in the instrument cluster comes on
(

page 34) although the parking brake is
released.
Have the brake system inspected immediately.
Contact an authorized smart center.
All checks and service work on the brake
system should be carried out by qualified
technicians only. Contact an authorized smart
center.
Only install brake pads and use brake fluid
recommended by smart.Inclines
!
When driving down long and steep grades,
relieve the load on the brakes by shifting into
a lower gear to use the engine’s braking
power. This helps prevent overheating of the
brakes and reduces brake pad wear.
When using the engine’s braking power, a
drive wheel may not spin for an extended pe

riod of time, e.g. on slippery road surfaces.
This may cause serious damage to the drive

train which is not covered by the smart
Limited Warranty.
G
Warning!
Make sure not to endanger any other
road users when carrying out braking
maneuvers.

Driving instructions
>> Operation
215 Drive sensibly
save fuel
Fuel consumption, to a great extent, depends
on driving habits and operating conditions.
To save fuel you should:
• Shift gears in a timely manner.
• Avoid frequent acceleration and decelera

tion.
• Keep tires at the recommended inflation
pressures.
• Remove carriers* when not in use.
• Remove unnecessary loads.
• Allow engine to warm up under low load use.
• Have all maintenance work performed at the
intervals specified in the Maintenance
Booklet and as required by the Maintenance
System. Contact an authorized smart cen

ter.
Fuel consumption is also increased by driving
in cold weather, in stop
and
go traffic, on
short trips, and in hilly areas.
Catalytic converterYour smart is equipped with monolithic
type
catalytic converter, an important element in
conjunction with the oxygen sensors to
achieve substantial control of the pollutants
in the exhaust emissions. Keep your vehicle in
proper operating condition by following our
recommended maintenance instructions as
outlined in your Maintenance Booklet.
G
Warning
The catalytic converter can become very
hot. Coming into contact with the catalytic
converter could result in burns.
Note the following:
• Do not remove the protective heat
guards.
• Do not apply any underseal.
• As with any vehicle, do not idle, park, or
operate this vehicle in areas where
combustible materials such as grass,
hay, or leaves can come into contact
with the hot exhaust system, as these
materials could be ignited and cause a
vehicle fire.

Driving instructions
216
>> Operation
!
To prevent damage to the catalytic
converter, only use premium unleaded gaso

line in this vehicle.
Any noticeable irregularities in engine oper

ation should be repaired promptly. Otherwise,
excessive unburned fuel may reach the cata

lytic converter, causing it to overheat and
potentially start a fire.
It is essential to observe the following points,
as there is otherwise a danger of overheating
and the catalytic converter may be damaged.
• Fill up only with premium unleaded gasoline.
Even small quantities of leaded gasoline can
damage the catalytic converter.
• Make sure you adhere to the prescribed
service intervals.
• Never run the fuel tank empty.
• If the engine starts to misfire, bring the ve

hicle to an immediate standstill without en

dangering traffic.
• If the engine fails to start the first time, you
should not try to start it any more than
three times in succession.
• Do not try to start for more than four sec

onds at a time.
TiresTreadwear indicators (TWI) are required by
law. These indicators are located in six places
on the tread circumference and become visi

ble at a tread depth of approximately
1/16in
(1.6 mm), at which point the tire is considered
worn and should be replaced. The treadwear indicator appears as a solid
band across the tread.
Specified tire inflation pressures must be
maintained. This applies particularly if the
tires are subject to high loads (e.g. high
speeds, heavy loads, high ambient tempera

tures).
G
Warning!
If you feel a sudden significant vibration
or ride disturbance, or you suspect that
possible damage to your vehicle has
occurred, you should turn on the hazard
warning flashers, carefully slow down,
and drive with caution to an area which is
a safe distance from the road.
Inspect the tires and the vehicle under

body for possible damage. If the vehicle
or tires appear unsafe, have the vehicle
towed to the nearest smart center or tire
dealer for repairs.
G
Warning!
Although the applicable federal motor
vehicle safety laws consider a tire to be
worn when the treadwear indicators (TWI)
become visible at approximately
1/16in
(1.6 mm), we recommend that you do not
allow your tires to wear down to that
level. As tread depth approaches
1/8in
(3 mm), the adhesion properties on a wet
road are sharply reduced.
Depending upon the weather and/or road
surface (conditions), the tire traction
varies widely.

Driving instructions
>> Operation
219
Road salts and chemicals can adversely affect
braking efficiency. Increased pedal force may
become necessary to produce the normal
braking effect.
Depressing the brake pedal periodically when
traveling at length on salt
strewn roads can
bring road
salt
impaired braking efficiency
back to normal.
If the vehicle is parked after being driven on
salt
treated roads, the braking efficiency
should be tested as soon as possible after
driving is resumed.For more information, see "Winter driving"
(

page 208).
Standing water!
Do not drive through flooded areas or
water of unknown depth. Before driving
through water, determine its depth. Never
accelerate before driving into water. The bow
wave could force water into the engine and
auxiliary equipment, thus damaging them.
If you must drive through standing water,
drive slowly to prevent water from entering
the passenger compartment, the front com

partment, or the engine compartment. Water
in these areas could cause damage to electri

cal components or wiring of the engine or
transmission, or could result in water being
ingested by the engine through the air intake,
causing severe internal engine damage.
Any such damage is not covered by the smart
Limited Warranty.
G
Warning!
Make sure not to endanger any other
road users when carrying out these
braking maneuvers.
G
Warning!
If the vehicle becomes stuck in snow,
make sure snow is kept clear of the
exhaust pipe and from around the vehicle
with the engine running. Otherwise,
deadly carbon monoxide (CO) gases may
enter vehicle interior resulting in uncon

sciousness and death.
To assure sufficient fresh air ventilation,
open a window slightly on the side of the
vehicle not facing the wind.G
Warning!
The outside temperature display is not
designed to serve as an ice
warning
device and is therefore unsuitable for
that purpose. Indicated temperatures
just above the freezing point do not
guarantee that the road surface is free of
ice.

Driving instructions
220
>> Operation
Passenger compartment Control and operation of radio
transmitters
Radio and telephoneTelephones and two
way radios
Radio transmitters, such as a mobile phone or
a c i ti z e n s b a n d u n i t s h o u l d o n l y b e u se d i n s i d e
the vehicle if they are connected to an
antenna that is installed on the outside of the
vehicle.
Refer to the radio transmitter operation
instructions regarding use of an external
antenna.
G
Warning!
Always fasten items being carried as
securely as possible.
In an accident, during hard braking or
sudden maneuvers, loose items thrown
around inside the vehicle may injure
vehicle occupants.
The cargo compartment is the preferred
place to carry objects.
G
Warning!
Please do not forget that your primary
responsibility is to drive the vehicle
safely. Only operate the radio or
telephone
1 if road, weather and traffic
conditions permit.
Bear in mind that at a speed of just
30 mph (approximately 50 km/h), your
vehicle is covering a distance of 44 feet
(approximately 14 m) every second.
1 Observe all legal requirements.
G
Warning!
Never operate radio transmitters
equipped with a built
in or attached
antenna (i.e. without being connected to
an external antenna) from inside the
vehicle while the engine is running. Doing
so could lead to a malfunction of the
vehicle’s electronic system, possibly
resulting in an accident and/or serious
personal injury.

Driving instructions
>> Operation
221 Emission control
Certain engine systems serve to keep the
toxic components of the exhaust gases within
permissible legal limits.
These systems, of course, will function prop

erly only when maintained strictly according
to factory specifications.
Any adjustments to the engine should there

fore be carried out only by qualified smart
center authorized technicians.
Engine adjustments should not be altered in
any way. Moreover, the specified service jobs
must be carried out regularly according to
smart servicing requirements. For details
refer to the Maintenance Booklet.
Coolant temperatureDuring severe operating conditions and stop

and
go city traffic, the coolant temperature
may rise close to approximately 248°F
(120°C).
The engine should not be operated with the
coolant temperature over 248°F (120°C).
Doing so may cause serious engine damage
which is not covered by the smart Limited
Warranty.
G
Warning!
Inhalation of exhaust gas is hazardous to
your health. All exhaust gas contains
carbon monoxide (CO), and inhaling it can
cause unconsciousness and lead to death.
Do not run the engine in confined areas
(such as a garage) which are not properly
ventilated. If you think that exhaust gas
fumes are entering the vehicle while
driving, contact a smart center immedi

ately. If you must drive under these con

ditions, drive only with at least one
window fully open at all times.

Driving instructions
222
>> Operation
G
Warning!
• Driving when your engine is over

heated can cause some fluids, which
may have leaked into the engine com

partment, to catch fire. You could be
seriously burned.
• Steam from an overheated engine can
cause serious burns which can occur
just by opening the front compartment
cover. Stay also away from the engine if
you see or hear steam coming from it.
Turn off the engine, get out of the vehicle
and do not stand near the vehicle until
the engine has cooled down.

What to do if ...
>> Practical hints.
237 Warning and indicator lamps in
the instrument cluster
General information:
If any of the following lamps in the instrument
cluster fails to come on during the bulb
self
check when switching on ignition
(
page 91), have the respective bulb
checked and replaced if necessary.
ABS indicator lamp (USA only)
ABS indicator lamp (Canada only)Illuminates:
• when the ignition is switched on.
Goes out:
• if engine is running or after 10 seconds• when there is a malfunction in the ABS sys

tem.
>Have the ABS system checked at an autho

rized smart center immediately.
• together with the brake warning lamp
(

page 238) when the ABS system fails.
>Stop the vehicle immediately in a safe
location.
>Do not continue to drive.
>Turn off the engine.
>Set the parking brake when leaving the
vehicle.
>Contact Roadside Assistance or an autho

rized smart center.
G
Warning!
When the ABS system is malfunctioning,
the wheels may lock during hard braking,
reducing steering capability and extend

ing the braking distance.
When the ABS is switched off due to a mal

function, the ESP
® is also switched off.
The basic driving and braking functions
are still avaiable.
The risk of your vehicle skidding is then
increased in certain situations. You
should therefore always adapt your
speed and driving style to the prevailing
road and weather conditions.