Smart roadster and smart roadster coupe. Manual - part 14

Helpful hints   10
13

Breakdown set*

쮿

Remove the stopper from the filler hose 
and push the end of the hose onto the 
tyre valve.

쮿

Hold the bottle with the filler hose 
pointing downwards and squeeze it.

쮿

Press the entire contents of the bottle 
into the tyre. 

쮿

Pull the hose off the valve and remove 
any residual sealant from the valve, 
rim and/or tyre.

쮿

Screw the original valve insert (or the 
replacement one if necessary) back 
into the valve with the valve remover.

쮿

Fit the compressor's air hose 
accurately onto the valve.

쮿

Plug the power connection into the 12

volt power socket. 

쮿

Inflate the tyre to at least 1.8 bar 
(maximum 2.5 bar).

>Note!
Do not run the electric compressor for 
more than six minutes. If you do so, there 
is a risk of overheating!

10
14   Helpful hints   

Breakdown set*

>Note!
If a pressure of 1.8 bar cannot be 
generated, disconnect the compressor 
from the wheel. Carefully drive the car 
10 meters forward or backward to 
distribute the tyre sealant in the tyre.
Inflate the tyre again.

쮿

Continue your journey immediately 
after removing the compressor, so that 
the tyre sealant is distributed evenly 
around the tyre's interior and can seal 
the damaged point.

쮿

After driving for about ten minutes, 
check the pressure with the gauge on 
the compressor.

>Important!
The compressor (yellow box) must be 
placed back in the footrest right after 
use, as it forms the footrest area for the 
passenger.

Accident risk!
If the tyre pressure of 1.8 bar 

cannot be achieved after five minutes, 
the tyre is damaged too severely.
Do not drive any further! Air could 
otherwise escape from the tyre. You 
could cause an accident as a result. 
Notify a qualified specialist 
workshop, e.g. a smart center.

Accident risk!
Do not exceed a speed of 80 km/h 

or 50 mph when you have repaired a tyre 
with the tyre sealant.
The "max. 80 km/h" must be displayed 
on the instrument panel within the 
driver's field of view.
Your car's handling characteristics 
may be impaired by the damaged tyre 
even if it has been repaired using the 
tyre sealant.

Accident risk!
If the tyre pressure has fallen 

below 1.3 bar, the tyre is too badly 
damaged.
Do not drive any further! Air could 
otherwise escape from the tyre. You 
could cause an accident as a result. 
Notify a qualified specialist 
workshop, e.g. a smart center.

Helpful hints   10
15

Breakdown set*

>Note!
If the pressure has fallen below 1.3 bar, 
do not continue your journey. If the 
pressure exceeds 1.3 bar, increase the 
tyre pressure to the level indicated in 
the car's operating instructions using 
the compressor. Carefully drive to the 
next qualified specialist workshop, 
e.g. a smart center.

>Note!
The manufacturer is unable to guarantee 
that all tyre punctures can be repaired 
with the breakdown set, in particular 
cuts or perforations with a diameter of 
more than 4 mm (1/8 in) or away from the 
tyre's tread. The manufacturer is not 
liable for damage sustained through 
improper use of the breakdown kit.

10
16   Helpful hints   

Wheel theft protection*

Wheel theft protection*

Caution!
Do not use impact wrenches. Store the 
security key in a suitable place in the 
car.

Caution!
For safety reasons, do not fit any hub caps 
or covers when fitting anti
theft devices 
to steel wheels.

>Note!
In the event of the security key being 
lost, please contact a smart center, 
presenting the code card for your key. 
Keep the code card for your key in a safe 
place.

Fitting the wheel anti
theft devices.

쮿

Remove one wheel stud from each wheel. 

쮿

Turn the anti
theft stud (1) with the 
attached security key (2) and tighten 
with a torque wrench.
> Tightening torque: 120 Nm

Accident risk!
The anti
theft wheel studs must 

be retightened with a torque spanner 
between 100 and 500 kilometres (see 
Tightening torque). Otherwise the 
studs could become loose and endanger 
yourself and other road users.

Helpful hints   10
17

Tyres and wheels

Tyres and wheels

General information
In the interests of safety, smart gmbh 
recommends that you use tyres that it has 
specially approved for your car. These 
tyres have been chosen to suit control 
systems such as abs and esp. If you use 
other tyres, smart gmbh is unable to 
accept any responsibility for damage 
resulting from their use. Information on 
tyres is available from any qualified 
specialist workshop, e.g. a smart center.

If you use tyres other than those
tested and recommended by smart gmbh, 
their characteristics such as road 
behaviour, noise and wear rate etc. could 
be poorer.
Dimensional deviations and a change in 
the way the tyres are compressed under 
load during operation could in addition 
cause them to rub against the body or axle 
components. This could result in damage 
to the tyre or vehicle.

smart gmbh neither tests nor recommends 
the use of retreaded tyres. The 
preliminary stages of damage cannot 
always be detected on tyres that are 
being retreated. smart gmbh is therefore 
unable to guarantee driving safety with 
retreaded tyres.

Modifications to the brake system and 
wheels and the use of spacer and brake 
dust rings are not permissible. In both 
cases the vehicle's operating approval 
will be nullified.

Accident risk!
Use only the tyre types, tyre sizes 

and wheel sizes that are approved for 
your type of vehicle.
If you fit different wheels:

 the wheel brakes or suspension 

components could be damaged.

 clearance between the wheels and 

tyres is no longer assured.

10
18   Helpful hints   

Tyres and wheels

Please note in particular:

 Use only tyres and wheels of the same 

type and make.

 Fit only the correct type of tyre on each 

wheel.

 Where a car has the same size of wheel 

at the front and rear, only switch tyres 
between the front and rear axles (RF to 
RR; LF to LR).

 Fit new tyres on the rear wheels.

 Break in new tyres at moderate speeds 

for the first 100 kilometres.

 Check tyres and wheels regularly for 

damage. Damaged wheels could result 
in a loss of pressure from and damage 
to the tyres.

 Do not use tyres with an excessively low 

tread. Below a tread depth of 
3 millimetres, grip will deteriorate 
sharply on wet roads. Summer tyres 
with a tread depth of 3 millimetres and 
winter tyres with a tread depth of less 
than 4 millimetres should therefore be 
replaced without fail.

 Change the tyres after no later than six 

years, irrespective of the level of 
wear. The same applies to the spare 
wheel.

>Note!
Store tyres in a cool, dry and preferably 
dark place when not fitted to the car. 
Protect the tyres against oil, grease and 
fuel. Never clean the tyres with high

pressure equipment. Your tyres could 
otherwise be damaged.

Operating safety and roadworthiness
Tyres are a particularly important aspect 
of the car's operating safety and 
roadworthiness. For this reason, check 
the tyre inflation pressure, tyre tread 
and tyre condition at regular intervals.
A tyre specialist shop or a qualified 
specialist workshop, such as a smart 
center, will be able to supply further 
information on

 tyre load capacity (LI, load index),

 speed index (maximum permitted 

operating speed of a tyre),

 tyre age,

 the causes and consequences of tyre 

wear,

 measures to take in the event of tyre 

damage,

 tyre types for particular regions, 

operating areas or operating 
conditions of the vehicle.

 scope for converting tyres, etc.

Helpful hints   10
19

Tyres and wheels

Tyre condition
Check tyres at regular intervals, e.g. for:

 external  damage,

 ageing,

 foreign bodies in the tread,

 cracks,  bulges,

 one
sided or irregular tread wear.

Tyre tread
Do not undercut the minimum tread depth 
of 3 millimetres (1/8 in) for summer tyres 
and 4 millimetres (3/16 in) for winter 
tyres.
Along with increasing tyre wear, the 
tyres' grip and car's handling 
characteristics deteriorate, 
particularly on wet or snow
covered 
roads. You should therefore change tyres 
before they undercut the minimum tread 
depth.
You should measure the tread depth with a 
tread depth gauge, available from a 
qualified specialist workshop such as a 
smart center.

Wear indicators integrated into the edge 
of the tread provide an additional visual 
sign as to whether the tyres need to be 
changed or not. These indicators, 
however, do not form narrow, continuous 
patterns until the depth of the remaining 
tread to the base of the tread groove has 
reached 1.6 millimetres (1/16 in). If you 
can see this indicator, the tyre must be 
replaced without delay.

Tyres continue to age even if they are 
used little or not at all. The operating 
safety and roadworthiness of all tyres 
gradually decreases. You should 
therefore replace tyres that were 
manufactured more than six years ago.
The date of production is indicated in 
the DOT number, which is displayed on 
the side of every tyre. Since 2000, the 
last two digits denote the tyre's year of 
production, preceded by two digits 
indicating the tyre's week of production 
(WWYY).

Danger of injury!
Always make sure the tyre tread is 

adequate. Too shallow a tyre tread will 
reduce the tyres' grip considerably and 
increase the risk of aquaplaning on wet 
or slushy roads and at high speeds. The 
tyre's tread will then no longer be able 
to cut through the water. You could lose 
control over your vehicle, cause an 
accident and injure yourself or others.

Accident risk!
Note that cracks, bulges or 

external damage could cause the tyre to 
burst. You could lose control over your 
vehicle as a result, cause an accident 
and injure yourself or others. All tyres 
exhibiting such defects should be 
replaced without delay.

10
20   Helpful hints   

Tyres and wheels

Tyre damage
Tyre damage may be caused e.g. by:

 the vehicle's operating conditions,

 curbs,

 foreign bodies,

 inadequate tyre inflation pressure,

 weather and environmental factors, 

contact with oils, greases, fuels, etc.

Interchanging wheels

On cars with the same size of wheels all 
round, depending on the level of wear you 
can interchange the wheels every 5,000 to 
10,000 kilometres (approx. 3,000 to 6,000 
miles). Always keep a wheel's direction 
of rotation the same. 
The front and rear wheels will wear at 
different rates, depending on the 
operating conditions. Interchange the 
wheels before a characteristic wear 
pattern has become established on the 
tyres. 
Clean the contact surface of the wheels 
and brake disc/inner side of the wheel 
each time the wheels are changed. Check 
the tyre inflation pressure.

Accident risk!
Driving over curbs or sharp

edged objects can cause damage to the 
tyre's carcass that is not externally 
visible. Damage to the tyre's carcass 
will only become evident much later 
and may result in tyre damage. You 
could lose control over your vehicle as 
a result and cause an accident which 
could injure yourself or others.

Accident risk!
Never clean tyres with high

pressure equipment. This could lead to 
tyre damage and failure. You could 
consequently cause an accident or 
injure other persons.

Accident risk!
Only interchange the front and 

rear wheels if they are of the same 
dimensions, e.g. rim size, wheel 
offset.

Helpful hints   10
21

Tyres and wheels

Changing a wheel

Accident risk!
Exceeding the quoted tyre load 

capacity and the permissible speed 
limit can result in tyre damage or tyre 
failure. You could lose control over 
your vehicle and cause an accident, 
injuring yourself or others as a result. 

For this reason, use only the tyre types, 
tyre sizes and wheel sizes that are 
approved for your type of vehicle. 
Please note in particular the customer

specific approval regulations for 
tyres. 

These regulations may specify the use 
of a particular tyre type for your car, or 
prohibit the use of certain tyre types 
that are permitted in other countries. 

The use of a particular type of tyre may 
moreover be recommended for certain 
regions and areas of use. 
Information on tyres is available from 
a qualified specialist workshop, e.g. a 
smart center.

Accident risk!
Have the tightening torque 

checked by a qualified specialist 
workshop after changing a wheel. smart 
gmbh recommends that you visit a smart 
center for this. It is particularly 
important to have safety
relevant work 
and work on safety
relevant systems 
performed by a qualified specialist 
workshop. The wheels could otherwise 
work loose if they are not tightened to 
a torque of 120 Nm. For safety reasons, 
use only the correct wheel studs 
approved by smart gmbh.

10
22   Helpful hints   

Tyres and wheels

Removing a wheel

쮿

Park the car on a level surface.

쮿

Apply the handbrake.

쮿

Press the brake pedal and move the 
softip gearshift control to position

R.

쮿

Switch off the engine.

쮿

Use a suitable wheel wrench to slacken 
off the wheel studs by turning them 
anticlockwise, but do not remove them 
yet.

쮿

Position a suitable car jack at one of 
the designated jacking points (A). 
These can be identified by 
impressions in the door sill area. 
> The contact surface of the jack 

support must be positioned 
vertically below the jacking point 
(A).

Accident risk!
Position the car jack only at the 

designated jacking points.
If you do not position the jack 
correctly, the car could topple off the 
jack and injure you or others.

Accident risk!
The jack is intended to lift the 

car off the ground for short spells only, 
when changing a wheel.
Trestles must be used when conducting 
work underneath the car.
Ensure that the jack is resting on a 
firm, level surface. On loose surfaces, 
place the jack on a stable support that 
cannot slip. Do not start the engine 
throughout the entire wheel
changing 
process.
Do not crawl under the vehicle while it 
is raised with the jack. If you raise the 
car in a manner other than that 
described, it could topple off the jack 
(e.g. as a result of starting the engine, 
opening or closing a door or the front 
or rear luggage compartment).

Helpful hints   10
23

Tyres and wheels

쮿

Lever the car up using the jack until 
the wheel is off of the ground.

쮿

Completely unscrew the wheel studs and 
remove the wheel.

Fitting a new wheel

Accident risk!
Use exclusively the wheel studs 

supplied.

Accident risk!
Replace any wheel studs that are 

damaged or corroded.
Never oil or grease wheel studs. If the 
thread of a wheel stud is damaged, 
never continue to drive on it. Notify a 
qualified specialist workshop, e.g. a 
smart center.

Use only the designated wheel studs for 
the wheel and car.

For safety reasons, smart gmbh 
recommends using only the wheel studs 
approved by smart gmbh. Other studs 
could work loose.

10
24   Helpful hints   

Tyres and wheels

쮿

Fit the wheel in place and tighten the 
bolts handtight using the wheel 
wrench.

쮿

Lower the car and remove the jack from 
under it.

쮿

Tighten the wheel bolts firmly using 
the wheel wrench (tightening torque: 
120 Nm).

>Note!
If the newly mounted wheels exhibit any 
imbalance, have this checked and 
rectified by a qualified specialist 
workshop, e.g. a smart center. 

Accident risk!
Have the tightening torque 

checked immediately after changing a 
wheel. The wheels could otherwise work 
loose if they are not tightened to a 
torque of 120 Nm.

Helpful hints   10
25

Battery

Battery

Safety notes and protective measures 
when handling the battery
Always observe the following safety notes 
and protective measures when handling 
the battery.
Use original smart batteries to assure a 
reliable fit and the correct functioning 
of electrical systems.

>Important!
Do not operate the vehicle without a 
battery fitted, otherwise its electrical 
equipment could be damaged.

Danger of explosion!
Highly explosive oxyhydrogen 
gas can form when batteries are 
being charged.

Fire, naked flame and smoking 
are forbidden!
Prevent sparking!

Danger of acid poisoning!
Battery acid is corrosive. Do 
not allow it to come into 

contact with your skin, eyes or 
clothing!
Immediately rinse any acid splashes 
with clean water for several minutes!
In the event of contact with the eyes or 
if swallowed, consult a doctor 
immediately!

Wear eye protection!
Keep acid away from the eyes or 
skin.

Keep children away!
Keep children away from 
batteries, acid or charging 
devices.

Observe the operating 
instructions!
Always observe the notes 
provided in the operating 
instructions.

Danger of injury!
Do not place any metal objects on 

the battery. Doing so could cause a 
short circuit.
Use only leak
free batteries so that 
vehicle occupants are not cauterised in 
the event of an accident.

10
26   Helpful hints   

Battery

Your car's battery

 Models with a petrol engine: 

12 volt and 42 ampere hours.

 Model with petrol engine (cold zone): 

12 volts and 61 ampere hours.

Danger of injury!
If the positive terminal of the 

connected battery is allowed to make 
contact with vehicle components, there 
could be a short circuit which could 
ignite the highly explosive gas 
mixture generated by the battery. You 
and others could sustain serious 
injuries as a result.

 When disconnecting the battery, 

always disconnect first the negative 
terminal, then the positive terminal.

 When connecting the battery, always 

connect first the positive terminal, 
then the negative terminal.

 Do not loosen or disconnect the 

battery terminal clips while the 
engine is running.

Environment!
Batteries contain lead and 
sulphuric acid, and should not be 

disposed of as domestic waste!
Hand any spent, faulty or damaged 
batteries in to a qualified specialist 
workshop, e.g. a smart center, or to a 
collection point for spent batteries.

Helpful hints   10
27

Battery

Installing and removing the battery

Make sure that

 you do not mix up the terminal clips. 

The battery could otherwise be 
destroyed.

 you never allow a wrench or other metal 

parts to come into contact with both 
battery terminals or with the positive 
terminal and the car body at the same 
time. There could otherwise be a short

circuit.

Removing the battery

쮿

Switch off the engine.

쮿

Switch off all electrical consumers.

쮿

Open the front luggage compartment.

쮿

Turn the four retaining screws in the 
luggage compartment storage tray 
anticlockwise and remove.

쮿

Remove the storage tray.

쮿

First, unscrew the negative terminal, 
then the positive terminal.

쮿

Remove the battery mount (A).

쮿

Remove the battery.

Installing the battery

쮿

Switch off all electrical consumers 
where appropriate.

쮿

Place the battery in the designated 
area.

쮿

Fasten the battery mount (A).

쮿

First fasten the positive terminal, 
then the negative terminal.

쮿

Mount the positive terminal cover.

10
28   Helpful hints   

Battery

Tips on battery care

 Your car's battery requires no 

maintenance in normal vehicle 
operation (DIN 43539/T2).
However, have the battery's charge 
status and acid level checked at the 
start of the cold season by a qualified 
specialist workshop, e.g. a smart 
center.

 The battery stoppers on the top must be 

opened to check the acid level (acid 
must come up to MAX mark).

 If the car is used almost exclusively 

for short trips, recharge the battery 
approximately every three months. 
This will preserve your vehicle's 
startability and prolong the battery's 
operating life.

 Disconnect the car's battery for 

extended periods of non
use and 
recharge approximately every six 
months.

 If the car is left for extended periods 

of time (three to four weeks) with the 
battery still connected, it must be 
recharged.