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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.
Page 161 of 228

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
Page 172 of 228

Problem Possible causes/consequences and
M Solutions# !
The turn signal
indicator lamp(s)
flashes at double
frequency. One of the turn signals is malfunctioning.
X
Replace the bulb as soon as possible ( Y page 179).
or
X Have the turn signal checked at an authorized smart center
as soon as possible. ®
The fuel cap
indicator lamp
comes on when
the engine is
running. The fuel cap may not be closed properly or the fuel system may
be leaky.
X
Check the fuel cap ( Y page 116).
X If it is not closed properly: Close the fuel cap.
X If it is closed properly: Have the fuel system checked at an
authorized smart center. Engine
Problem Possible causes/consequences and
M Solutions?
The red coolant
temperature
warning lamp
illuminates
while the
engine is
running. The coolant is too hot.
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. The coolant level has fallen below the marking bar on the
coolant reservoir (Y page 122).
X
Add coolant as required.
X Have the coolant system checked for leaks at an authorized
smart center. 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. 170
What to do if ...
>> Practical hints.