more quickly and protecting them against
corrosion.
Limited braking performance on salt-
treated roads
If you drive on salted roads, a layer of salt
residue may form on the brake discs and brake
pads. This can result in a significantly lon-
ger braking distance.
RBrake occasionally to remove any possible
salt residue. Make sure that you do not
endanger other road users when doing so.
RCarefully depress the brake pedal and the
beginning and end of a journey.
RMaintain a greater distance to the vehicle
ahead.
Servicing the brakes
!The brake fluid level may be too low, if:
Rif the red brake warning lamp lights up
in the instrument cluster and
Ryou hear a warning tone while the engine
is running
Observe additional warning messages in
the multifunction display.
The brake fluid level may be too low due to
brake pad wear or leaking brake lines.
Have the brake system checked immedi-
ately. Consult a qualified specialist work-
shop to arrange this.
!A function or performance test should
only be carried out on a 2-axle dynamome-
ter. If you wish to operate the vehicle on
such a dynamometer, please consult a
qualified specialist workshop in advance.
You could otherwise damage the drive train
or the brake system.
!As the ESP®system operates automati-
cally, the engine and the ignition must be
switched off (the SmartKey must be in posi-
tion 0or 1in the ignition lock) if:
Rthe parking brake is tested using a brake
dynamometer (maximum 10 seconds).
Rthe vehicle is towed with the front axle
raised.
Braking triggered automatically by ESP
®
may seriously damage the brake system. All checks and maintenance work on the brake
system must be carried out at a qualified
specialist workshop.
Have brake pads installed and brake fluid
replaced at a qualified specialist workshop.
If the brake system has only been subject to
moderate loads, you should test the function-
ality of your brakes at regular intervals.
When having brake pads/linings fitted, smart
recommends that you only use those which are
approved for smart vehicles or are of an
equivalent quality standard. Brake pads/
linings which have not been approved for
smart vehicles or which are not of an equiv-
alent quality could affect your vehicle's
operating safety.
smart recommends that you only use brake
fluid which is approved for smart vehicles or
is of an equivalent quality standard. Brake
fluid which has not been approved for smart
vehicles or which
is not of an equivalent
quality could affect your vehicle's operating
safety.
Driving on wet roads
Hydroplaning
If water has accumulated to a certain depth on the road surface, there is a danger of hydro-
planing occurring, even if:
Ryou drive at low speeds.
Rthe tires have adequate tread depth.
For this reason, in the event of heavy rain or in conditions in which hydroplaning may
occur, you must drive in the following man-
ner:
Rlower your speed.
Ravoid ruts.
Ravoid sudden steering movements
Rbrake carefully.
Driving on flooded roads
!Bear in mind that vehicles traveling in
front or in the opposite direction create
waves. This may cause the maximum per-
missible water depth to be exceeded.
Failure to observe these notes may result in damage to the engine, electrical systems
and transmission.
104Driving tips
>> Driving and parking.
XTurn the key to position1in the ignition
lock (Ypage 87).
XPress on/off switch 0084on tire inflation
compressor 0044toI.
The tire inflation compressor is switched
on. The tire is inflated.
iFirst, tire sealant is pumped into the
tire. The pressure can briefly rise to
approximately 600 kPa (6.0 bar/86 psi).
Do not switch off the tire inflation com-
pressor during this phase.
XLet the tire inflation compressor run for a
maximum of 15 minutes. The tire should then
have attained a pressure of at least 180 kPa
(1.8 bar/26 psi).
If a tire pressure of 180 kPa (1.8 bar/26 psi) is
achieved after a maximum of 15 minutes, see
"Tire pressure is achieved" (
Ypage 163).
If a tire pressure of 180 kPa (1.8 bar/26 psi)
has not been achieved after a maximum of
15 minutes, see "Tire pressure is not ach-
ieved" (
Ypage 163).
iIf tire sealant leaks out, allow it to dry. It
can then be removed like a layer of film.
If your clothes are soiled with tire sealant,
have them cleaned with perchloroethylene
at a dry cleaner as soon as possible.
Tire pressure not reached
If a tire pressure of 180 kPa (1.8 bar/26 psi)
has not been achieved after a maximum of
10 minutes:
XSwitch off the tire inflation compressor.
XUnscrew the filler hose from the valve of
the faulty tire.
XVery slowly drive forwards or reverse
approximately 30 ft (10 m).
XPump up the tire again.
After a maximum of 10 minutes, the tire
pressure must be at least 180 kPa (1.8 bar/
26 psi).
GWARNING
If the required tire pressure is not reached after the specified time, the tire is too
badly damaged. The tire sealant cannot
repair the tire in this instance. Damaged
tires and a tire pressure that is too low can
significantly impair the vehicle's braking
and driving characteristics. There is a
risk of accident.
Do not continue driving. Contact a quali-
fied specialist workshop.
Tire pressure reached
GWARNING
A tire temporarily sealed with tire sealant impairs the driving characteristics and is
not suitable for higher speeds. There is a
risk of accident.
You should therefore adapt your driving
style accordingly and drive carefully. Do
not exceed the specified maximum speed
with a tire that has been repaired using
tire sealant.
The maximum speed for a tire sealed with tire
sealant is 50 mph (80 km/h). The 50 mph
(80 km/h) maximum speed sticker must be
affixed to the instrument cluster within the
driver's field of vision.
!After use, excess tire sealant may run out
of the filler hose. This could cause stains.
Therefore, place the filler hose in the
plastic bag that contained the TIREFIT kit.
HEnvironmental note
Have the used tire sealant bottle disposed
of professionally, e.g. at a qualified spe-
cialist workshop.
If a tire pressure of 180 kPa (1.8 bar/26 psi)
has been achieved after 10 minutes:
XSwitch off the tire inflation compressor.
XUnscrew the filler hose from the valve of
the faulty tire.
XStow the tire sealant bottle and the tire
inflation compressor.
XPull away immediately.
XStop after driving for approximately
2 miles (3 km) and check the tire pressure
with the tire inflation compressor.
The tire pressure must now be at least
130 kPa (1.3 bar/19 psi).
Flat tire163
>> Breakdown assistance.
Z