engine SMART FORTWO COUPE 2012 Workshop Manual

important to keep in mind that a
considerably higher degree of effort is
necessary to brake and steer the vehicle.
Adapt your driving accordingly.
Brakes
G
WARNING
Make sure not to endanger any other road
users when carrying out braking
maneuvers.
Refer to the description of the hydraulic
brake assistant
(Y page 48).
! Because the ESP ®
operates
automatically, the engine must be turned
off (ignition switched off) when the
parking brake is being tested on a brake
test dynamometer. 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 (Y page 22) 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
period 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.
High and low stresses G
WARNING
Resting your foot on the brake pedal will
cause excessive and premature wear of the
brake pads.
It can also result in the brakes
overheating, thereby significantly
reducing their effectiveness and your
ability to stop the vehicle in sufficient
time to avoid an accident.
After

hard braking, it is advisable to drive
on for some time, rather than immediately
park, so that the air stream will cool down
the brakes faster.
If your brake system is normally only
subjected to moderate loads, you should
occasionally test the effectiveness of the
brakes by applying above-normal braking
pressure at higher speeds. This will also
enhance the grip of the brake pads. G
WARNING
Make sure not to endanger any other road
users when carrying out these braking
maneuvers.
Wet road surface G
WARNING
After driving in heavy rain for some time
without applying the brakes or through
water

deep enough to wet brake components,
the first braking action may be somewhat
reduced and increased pedal pressure may
be necessary to obtain expected braking 144
Driving instructions
>> Operation.

effect. Maintain a safe distance from
vehicles in front.
To
help prevent brake disc corrosion after
driving on wet road surfaces (particularly
salted roads), it is advisable to brake the
vehicle with considerable force prior to
parking. The heat generated serves to dry
the brakes. G
WARNING
Make sure not to endanger any other road
users when carrying out these braking
maneuvers.
Limited braking effect on salted roads Remember that the effect of the brakes can
be

limited on salted road surfaces. A layer
of salt can form on brake discs and brake
pads, considerably reducing the friction
between the brake disc and the brake pad.
The effect is most noticeable after long
trips without braking, e.g. on the highway,
and after the vehicle has been parked for
several hours. G
WARNING
The accumulation of salt on brake discs and
brake pads reduces braking effectiveness
and increases the distance necessary to
come to a complete standstill. This could
potentially cause an accident and/or
personal injury.
To avoid this risk, you should
R brake carefully every now and then on
salted

roads in order to remove any layer
of salt on the brake disc and brake pad,
but do so without endangering any other
road users
R keep a good safe distance from the
vehicle in front and drive carefully
R press the brake carefully at the end of the
trip and again when beginning the next
trip in order to remove any salt residues
from the brake disc New brake pads Only install brake pads recommended by
smart.
G
WARNING
If other than recommended brake pads are
installed,
or other than recommended brake
fluid is used, the braking properties of the
vehicle can be degraded to an extent that
safe braking is substantially impaired.
This could result in an accident. G
WARNING
New brake pads will not achieve their
optimal braking effect until after several
hundred miles (kilometers). This means
that you must compensate for the reduced
braking effect by pressing harder on the
brake pedal and adapt your driving style
accordingly. The same applies after brake
pads or brake discs have been changed. Drive sensibly - save fuel
Fuel consumption, to a great extent,
depends on driving habits and operating
conditions.
To save fuel you should:
R Shift gears in a timely manner.
R Avoid frequent acceleration and
deceleration.
R Keep

tires at the recommended inflation
pressures.
R Remove carriers* when not in use.
R Remove unnecessary loads.
R Allow engine to warm up under low load
use.
R Have all maintenance work performed at
the intervals specified in the
Maintenance Booklet and as required by
the Maintenance System. Contact an
authorized smart center.
Fuel consumption is also increased by
driving in cold weather, in stop-and-go
traffic, on short trips, and in hilly areas. Driving instructions
145
>> Operation.
* optional Z

Catalytic converter
Your 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:
R Do not remove the protective heat guards.
R Do not apply any underseal.
R 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.
! To prevent damage to the catalytic
converter, only use premium unleaded
gasoline in this vehicle.
Any noticeable irregularities in engine
operation should be repaired promptly.
Otherwise, excessive unburned fuel may
reach the catalytic 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.
R Fill up only with premium unleaded
gasoline. Even small quantities of
leaded gasoline can damage the catalytic
converter.
R Make sure you adhere to the prescribed
service intervals.
R Never run the fuel tank empty. R
If
the engine starts to misfire, bring the
vehicle to an immediate standstill
without endangering traffic.
R If the engine fails to start the first time,
you should not try to start it any more
than three times in succession.
R Do not try to start for more than four
seconds at a time. Tires
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 underbody
for possible damage. If the vehicle or tires
appear unsafe, have the vehicle towed to the
nearest smart center or tire dealer for
repairs.
Treadwear indicators (TWI) are required by
law. These indicators are located in six
places on the tread circumference and
become visible at a tread depth of
approximately 1
/ 16 in (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. 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
/ 16 in
(1.6 mm), we recommend that you do not allow
your tires to wear down to that level. As
tread depth approaches 1
/ 8 in (3 mm), the
adhesion properties on a wet road are
sharply reduced. 146
Driving instructions
>> Operation.

(Y page 217), for example when purchasing
new tires.
For
information on how to identify the tire
speed rating on a tire’s sidewall, see “Tire
size designation, load and speed rating”
(Y page 136).
If you are uncertain about the correct
reading of the information given on a
tire’s sidewall, any authorized smart
center will be glad to assist you.
i For information on speed ratings for
winter tires, see “All-season and winter
tires” ( Y page 137). Winter driving instructions
The
most important rule for slippery or icy
roads is to drive sensibly and to avoid
abrupt acceleration, braking and steering
maneuvers.
When the vehicle is in danger of skidding,
move gear selector lever to neutral
position N. Try to keep the vehicle under
control by corrective steering action.
For information on driving with snow
chains*, see “Snow chains*” (Y page 142). G
WARNING
On slippery road surfaces, never downshift
in order to obtain braking action. This
could result in drive wheel slip and
reduced

vehicle control. Your vehicle’s ABS
will not prevent this type of loss of control.
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. 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 unconsciousness 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.
For more information, see “Winter driving”
(Y page 142). 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
R the front compartment
R the engine compartment
R the passenger compartment
Water in these areas could cause damage to
electrical components or wiring of the
engine or transmission, or could result in 148
Driving instructions
>> Operation.
* optional

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. Passenger compartment
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. Control and operation of radio
transmitters
Radio and telephone G
WARNING
Please do not forget that your primary
responsibility is to drive the vehicle
safely. Only operate the radio or
telephone 16
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.
Telephones and two-way radios 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.
Radio

transmitters, such as a mobile phone
or a citizens band unit should only be used
inside 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. 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
properly only when maintained strictly
according to factory specifications.
Any adjustments to the engine should
therefore

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. 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, have the cause determined and
corrected immediately. If you must drive
under these conditions, drive only with at
least one window fully open at all times.
16 Observe all legal requirements. Driving instructions
149
>> Operation. Z

Coolant temperature
During severe operating conditions and
stop-and-go city traffic, the coolant
temperature may rise.
! Excessive coolant temperature causes
the red coolant temperature warning
lamp ? in the instrument cluster to
come on.
The engine should not be operated with
the red coolant temperature warning
lamp ? illuminated. Doing so may
cause serious engine damage which is
not covered by the smart Limited
Warranty.
For more information on coolant
temperature warning lamp ( Y page 170).G
WARNING
Driving when your engine is overheated can
cause some fluids which may have leaked
into the engine compartment to catch fire.
You could be seriously burned.
Steam
from an overheated engine can cause
serious burns which can occur just by
opening the engine hood. Stay away from the
engine if you see or hear steam coming from
it.
Stop the vehicle in a safe location away
from other traffic. Turn off the engine, get
out of the vehicle and do not stand near the
vehicle until the engine has cooled down. Driving abroad
Abroad,
there is an extensive smart service
network at your disposal. If you plan to
drive into areas which are not listed in the
index of your smart center directory, you
should request pertinent information from
an authorized smart center. Symmetrical low beams
i If you drive in countries where
vehicles drive on the other side of the
road than the country in which the
vehicle is registered, you must have the
headlamps

modified for symmetrical low
beams. Relevant information can be
obtained at any authorized smart center. Vehicle care
Care tips
Regular and proper care will help to
maintain the value of your vehicle. The
best way to protect your vehicle from
harmful environmental influences is to
wash it and use protective treatments
regularly.
smart recommends that you care for the
paintwork

at least twice a year (e.g. in the
spring and autumn). G
WARNING
Many cleaning products can be hazardous.
Some are poisonous, others are flammable.
Always follow the instructions on the
particular container. Always open your
vehicle’s doors or windows when cleaning
the inside.
Never use fluids or solvents that are not
designed for cleaning your vehicle.
Always lock away cleaning products and
keep them out of reach of children.
! Follow

the care tips. Wash your vehicle
preferably by hand.
While in operation or even while parked,
your vehicle is subjected to varying
external influences, which left unchecked
can attack the paint as well as the vehicle
underbody and lead to permanent damage. 150
Vehicle care
>> Operation.

!
Do not aim directly at
R electrical parts
R electrical connectors
R seals
R other rubber parts
The distance should be at least 3.9 in
(10 cm) and the water temperature must
not exceed 140¦ (60¥). Follow the
instructions provided by the power
washer manufacturer on maintaining a
distance between the vehicle and the
nozzle of the power washer.
Always keep the jet of water moving
across the surface.
! Powerwashing could damage
R the high-voltage battery
R the drive system
R the engine compartment
Do not powerwash these components.
Wheel cover* X
Wash the wheel cover with shampoo and a
soft brush or in the car wash.
Decorative foils !
Decorative foils are permanently
adhered to the painted parts of the
vehicle and cannot be removed.
! Do not expose the foils to solvents,
gasoline or diesel.
i When
cleaning with a power washer, note
the following guideline values:
R Water temperature max. 176 ¦ (80¥)
R Minimum distance 11.8 in (30 cm)
R Jet of water strike at a right angle Paintwork care
The
frequency with which you care for your
paintwork is dependent on
R how much the vehicle is used
R where you normally park the vehicle (e.g.
in a garage or under a tree)
R the season
R weather and environmental influences
Rectifying paintwork damage You can use a touch-up paint pen to repair
minimal stone chip damage and scratches.
Recommended touch-up paint pens can be
obtained in a smart center.
i
For

any major paintwork damage, please
contact a smart center. Exterior Repair options
Plastic parts (body
panels) with
clearcoat Clearcoat touch-up
paint pen
Body panels with
base coat and
clearcoat recommended
touch-up paint pen
set in the relevant
color
tridion safety cell recommended
touch-up paint pen
set in the relevant
color
Soft top system (cabriolet only)
Regular care will protect the retractable
soft top and the rear soft top against
external influences, helping to preserve
its value. Use only an approved soft top
cleaner when removing dirt from the soft
top.
! Never clean the soft top using a power
washer,

as water could get into the inside
of the vehicle. 154
Vehicle care
>> Operation.
* optional

Vehicles without control system
Display messages Possible causes/consequences and
M Solutions The electronic immobilizer is not working.
X
Have the system checked at an authorized smart center. There is a malfunction in the shifting system.
X
Have the system checked at an authorized smart center. The transmission is taught-in (
Y page 86).
X Have the system checked at an authorized smart center. Vehicles with control system*
Display messages Possible causes/consequences and
M Solutions?
Switch Engine Off The coolant is too hot.
X
Stop the vehicle immediately as soon as it is safe to do so.
X Turn off the engine immediately.
X Engage the parking brake.
X Make sure the air supply for the radiator is uninterrupted.
X Only start the engine again after the display message
disappears. You could otherwise damage the engine. G
WARNING
Driving when your engine is overheated can cause some fluids which may have leaked into
the engine compartment to catch fire. You could be seriously burned.
Steam from an overheated engine can cause serious burns which can occur just by opening
the engine hood. Stay away from the engine if you see or hear steam coming from it.
Stop the vehicle in a safe location away from other traffic. Turn off the engine, get out of
the vehicle and do not stand near the vehicle until the engine has cooled down.
! Among other possible causes, the poly-V-belt could be broken. Do not continue to
drive.
Otherwise, the engine will overheat due to an inoperative water pump which may
result in damage to the engine. Display messages
159
>> Practical hints.
* optional Z

Display messages Possible causes/consequences and
M Solutions4
Switch Engine Off The engine oil level is too low. The engine could be damaged.
X
Stop the vehicle as soon as it is safe to do so.
X Turn off the engine.
X Engage the parking brake.
X Check the engine oil level (Y page 118) and add engine oil as
required (Y page 119). J
Release Parking
Brake You are driving with the parking brake engaged.
X
Release the parking brake. 5
Shift

to N or P to
Start You have attempted to start the engine while the automatic
transmission was in reverse gear
R or drive position D.
Shift the automatic transmission into park position P or
neutral position N.5
Apply Brakes to
Start You have attempted to start the engine without depressing the
brake pedal.
Depress the brake pedal to start the engine.
Display messages Possible causes/consequences and
M Solutions#
Charge Battery The battery is not being charged.
Possible causes:
R
alternator malfunctioning
R broken poly-V-belt
X Stop the vehicle immediately as soon as it is safe to do so.
X Turn off the engine immediately.
X Engage the parking brake.
X Check the poly-V-belt.
X If poly-V-belt is broken: Do not continue to drive. Contact
an authorized smart center.
X If poly-V-belt is intact: Have the vehicle checked at an
authorized smart center immediately. !
Among other possible causes, the poly-V-belt could be broken. Do not continue to
drive.

Otherwise, the engine will overheat due to an inoperative water pump which may
result in damage to the engine. 160
Display messages
>> Practical hints.

Brake
Problem Possible causes/consequences and
M Solutionsò (USA only)
! (Canada only)
The ABS indicator
lamp illuminates
while the engine is
running. There is a malfunction in the ABS system.
X
Have the ABS system checked at an authorized smart center
immediately. ò (USA only)
! (Canada only)
The ABS indicator
lamp illuminates
together with the
brake warning lamp
while the engine is
running. The ABS system fails.
X
Stop the vehicle immediately in a safe location.
X Do not continue to drive.
X Turn off the engine.
X Engage the parking brake when leaving the vehicle.
X Contact Roadside Assistance or an authorized smart center. G
WARNING
When the ABS system is malfunctioning, the wheels may lock during hard braking, reducing
steering capability and extending the braking distance.
When the ABS is switched off due to a malfunction, the ESP ®
is also switched off. The basic
driving and braking functions are still available.
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. What to do if ...
163>> Practical hints. Z