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 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).
Page 310 of 314
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.
Page 311 of 314
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 protection35°F (37°C)
49°F (45°C)
All models
2.27 US qt (2.15 l)
2.45 US qt (2.32 l)
