SMART fortwo coupe Operator's Manual page 190

Jump starting
188
Do not attempt to start the engine using
a battery quick charge unit.
If the engine does not run after several
unsuccessful starting attempts, have it
checked at the nearest authorized smart
center.
Excessive unburned fuel generated by
repeated failed starting attempts may
damage the catalytic converter and may
present a fire risk.
Make sure the jumper cables do not have
loose or missing insulation.
Make sure the cable clamps do not touch
any other metal part while the other end
is still attached to a battery.
If the battery is discharged, the engine can
be started with jumper cables and the fully
charged battery of another vehicle or an
equivalent starter pack. Observe the
following:
Access to the battery is not possible on
R
all vehicles. If you cannot access the
battery in your vehicle provide jump
start power by an external battery or
starter pack.
Jump starting should only be performed
R
when the engine and catalytic converter
are cold.
Do not start the engine if the battery is
R
frozen. Let the battery thaw out first.
Only jump start from batteries with the
R
same voltage rating (12 V). Jump starting
with a more powerful battery could
damage the vehicle's electrical system.
Such damage will not be covered by the
smart Limited Warranty.
Only use jumper cables with sufficient
R
cross-section and insulated terminal
clamps.
Always make sure the jumper cables are
R
not on or near pulleys, fans or other parts
that move when an engine is started or
running.
Should the battery be drained
R
completely, let the donating power
source charge the vehicle for several
minutes before reattempting the
starting process.
G
Warning!
Keep flames or sparks away from battery. Do
not smoke.
Observe all safety instructions and
precautions when handling automotive
batteries.
Jump start assistance
Your vehicle's battery is located in the
passenger footwell below the footrest
Y
( page 186).
For jump starting, use the terminals of the
battery, keeping the leads connected.
X
Make sure the two vehicles do not touch.
X
Switch off all electrical consumers.
X
Engage the parking brake.
X
Move the gear selector lever to park
position P.
X
Turn off the engine.
X
Get access to the battery in the passenger
Y
footwell ( page 186).
X
Remove the positive terminal cover.