Page 179 of 314
Front compartment
178
>> Operation
Coolant
The engine coolant is a mixture of water and
anticorrosion/antifreeze.
To check the coolant level the vehicle must be
parked on level ground and the engine must
have cooled down. For more information, see
"Coolants" (
page 309).Checking coolant level
The coolant reservoir is located in the front
compartment on the driver’s side.
1
Pressure cap
2
Marking bar
G
Warning!
In order to avoid potentially serious
burns:
• Use extreme caution when opening the
service flap if there are any signs of
steam or coolant leaking from the
cooling system, or if the coolant
temperature warning lampD in the
instrument cluster indicates that the
coolant is overheated.
• Do not remove pressure cap on coolant
reservoir if coolant temperature is
above 158°F (70°C). Allow engine to
cool down before removing cap. The
coolant reservoir contains hot fluid
and is under pressure.
• Using a rag, slowly open the cap ap
proximately
1/2 turn to relieve excess
pressure. If opened immediately,
scalding hot fluid and steam will be
blown out under pressure.
P20.30226531
Page 180 of 314
Front compartment
>> Operation
179
>Allow the radiator to cool down for at least
30 minutes.
>Using a rag, turn pressure cap
1 slowly
approximately one half turn counterclock
wise to release any excess pressure.
>Continue turning pressure cap1
counter
clockwise
and remove it.
The coolant level is correct if the level
• for cold coolant: reaches marking bar
2
visible through the filling opening
• for warm coolant: is approximately 0.6 in
(1.5 cm) higher
>If necessary, add coolant.
Adding coolant
>Add coolant as required. The coolant level
may not exceed the maximum filling level.
>Replace and tighten pressure cap
1.
Windshield/rear window
1 washer
system
Both the windshield and the rear window
1
washer are supplied from the windshield
washer reservoir.
The recommended minimum filling level is
1.06 US qt (1.0 l).
The windshield washer reservoir is located in
the front compartment on the driver’s side.
1
CapDuring all seasons,
• use a windshield washer concentrate la
beled for summer and water for tempera
tures above freezing point.
• use a windshield washer concentrate la
beled for winter and water for tempera
tures below freezing point.
1 coupé only.
P82.35248831
G
Warning!
Windshield washer concentrate is highly
flammable. Fire, naked flames and
smoking are prohibited when windshield
washer concentrate is being handled.
Page 205 of 314
Tires and wheels
204
>> Operation Tire ply material
1
Plies in sidewall
2
Plies under tread
i
For illustration purposes only. Actual data
on tires are specific to each vehicle and may
vary from data shown in above illustration.
This marking tells you about the type of cord
and number of plies in the sidewall and under
the tread.
Tire and loading terminologyAccessory weight
The combined weight (in excess of those stan
dard items which may be replaced) of auto
matic transmission, power steering, power
brakes, power windows, power seats, radio,
and heater, to the extent that these items are
available as factoryinstalled equipment
(whether installed or not).
Air pressure
The amount of air inside the tire pressing
outward on each square inch of the tire.
Air pressure is expressed in pounds per
square inch (psi), or kilopascal (kPa) or bars.
Aspect ratio
Dimensional relationship between tire section
height and section width expressed in per
centage.Bar
Another metric unit for air pressure. There
are 14.5038 pounds per square inch (psi)
to 1 bar; there are 100 kilopascals (kPa)
to 1 bar.
Bead
The tire bead contains steel wires wrapped by
steel cords that hold the tire onto the rim.
Cold tire inflation pressure
Tire inflation pressure when your vehicle has
been sitting for at least 3 hours or driven no
more than 1 mile (1.6 km).
Curb weight
The weight of a motor vehicle with standard
equipment including the maximum capacity of
fuel, oil, and coolant, and, if so equipped, air
conditioning and additional optional equip
ment, but without passengers and cargo.
Page 222 of 314
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
andgo 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.
Page 225 of 314
Vehicle care
224
>> Operation
Care tipsRegular and proper care will help to maintain
the value of your vehicle. The best way to pro
tect 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).
!
Follow the care tips. Wash your vehicle
preferably by hand.
While in operation, even while parked, your
vehicle is subjected to varying external influ
ences which, if gone unchecked, can attack
the paintwork as well as the vehicle underbody
and cause lasting damage.Such damage is caused not only by extreme
and varying climatic conditions, but also by:
•Air pollution
• Road salt
•Tar
• Gravel and stone chipping
To avoid paint damage, you should
immediately remove:
•Insects
• Bird droppings
• Tree sap, etc.
• Grease and oil
•Break fluid
•Coolant
•Fuel
•Tar spots
!
Failure to remove such dirt immediately
can cause damage to the paint or the soft top
fabric*. Environmental influences are not
covered by the smart Limited Warranty.
G
Warning!
Many cleaning products can be hazard
ous. 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.
Page 242 of 314
What to do if ...
>> Practical hints.
241
Coolant temperature warning lamp
Illuminates:
• when the ignition is switched on.
The warning lamp goes out if the engine is
running.
• if the coolant is too hot.
>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.If the coolant level has fallen below the
marking bar on the coolant reservoir
(
page 178):
>Add coolant as required.
>Have the coolant system checked for leaks
at an authorized smart center.
!
Among other possible causes, the
polyVbelt 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.
When the system detects a malfunction,
the telltale will flash for approximately
1 minute and then remain continuously
illuminated.
This sequence will continue upon subse
quent vehicle startups as long as the
malfunction exists. When the malfunction
indicator is illuminated, the system may
not be able to detect or signal low tire
pressure as intended.
TPMS malfunctions may occur for a vari
ety of reasons, including the installation
of incompatible replacement or alternate
tires or wheels on the vehicle that pre
vent the TPMS from functioning properly.
Always check the TPMS malfunction tell
tale after replacing one or more tires or
wheels on your vehicle to ensure that the
replacement or alternate tires and
wheels allow the TPMS to continue to
function properly.
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.
Turn off the engine, get out of the vehicle
and do not stand near the vehicle until
the engine has cooled down.
Page 297 of 314
Layout of polyVbelt
296
>> Technical data. For dimensions of the polyVbelt, see
"Engine" (
page 297).
All modelsVehicles with air conditioning with climate
control* have two polyVbelts. The additional
polyVbelt is shown in black. The standard
polyVbelt is shown in purple.1
Automatic belt tensioner
2
Generator (alternator)
3
Coolant pump
4
Air conditioning compressor*
5
Crankshaft
Page 305 of 314
Service fluids and capacities
304
>> Technical data.
Components
Model
Capacity
Fuels, coolants, lubricants, etc.
Engine with oil filter
All models
approx. 3.5 US qt (3.3 l)
Approved engine oils
Transmission
All models
2.4 US qt (2.3l)
BOT328
Brake system
All models
1.05 US qt (1.0 l)
Brake fluid (DOT 4+)
Cooling system
All models
approx. 4.5 US qt (4.3 l)
Anticorrosion/Antifreeze meeting specification MB 325.0
Fuel tank
All models
8.72 US gal (33.0 l)
Premium unleaded gasoline:
including a reserve of
All models
1.32 US gal (5.0 l)
Minimum Posted Octane 91 (Afvg. of 96 RON/86 MON)
Air conditioning system*
All models
R134a refrigerant and special PAG lubricant oil (never R12)
Windshield washer system
All models
4.0 US qt (3.8 l)
Windshield washer concentrate
1
1 Use a windshield washer concentrate labeled for summer and water for temperatures above freezing point or a windshield washer concentrate labeled for winter and water for
temperatures below freezing point. Follow suggested mixing ratios (
page 308).
