Page 196 of 314
Tires and wheels
>> Operation
195
>Press Restarting TPMS button1.
>The combination low tire pressure/TPMS
malfunction telltale in the instrument
cluster (
page 34) flashes for approxi
mately 5 seconds and then goes out.
After driving a few minutes the system
verifies that the current tire inflation
pressures are within the system’s specified
range. Afterwards the current tire inflation
pressures are accepted as reference
pressures and then monitored.Potential problems associated with
underinflated and overinflated tires
Underinflated tires
Underinflated tires can:
• cause excessive and uneven tire wear
• adversely affect fuel economy
• lead to tire failure from being overheated
• adversely affect handling characteristicsOverinflated tires
Overinflated tires can:
• adversely affect handling characteristics
• cause uneven tire wear
• be more prone to damage from road
hazards
• adversely affect ride comfort
• increase stopping distance
G
Warning!
Follow recommended tire inflation
pressures.
Do not underinflate tires. Underinflated
tires wear excessively and/or unevenly,
adversely affect handling and fuel econ
omy, and are more likely to fail from being
overheated.
G
Warning!
Follow recommended tire inflation
pressures.
Do not overinflate tires. Overinflated
tires can adversely affect handling and
ride comfort, wear unevenly, increase
stopping distance, and result in sudden
deflation (blowout) because they are
more likely to become punctured or
damaged by road debris, potholes etc.
Page 240 of 314
What to do if ...
>> Practical hints.
239
• with the parking brake set.
• if the brake circuit fails or the brake fluid
level in the brake fluid reservoir is too low.
>Stop the vehicle immediately in a safe
location.
>Do not continue to drive.
>Turn off the engine.
>Do not add brake fluid as this will not solve
the problem.
>Set the parking brake when leaving the
vehicle.
>Contact Roadside Assistance or an autho
rized smart center.
!
If you find that the brake fluid in the brake
fluid reservoir has fallen to the minimum mark
or below, have the brake system checked for
brake pad thickness and leaks.
• together with the ABS indicator lamp
(page 237) when the ABS system fails.
>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.Combination low tire pressure/
TPMS malfunction telltale
Illuminates continuously:
• when the TPMS detects a loss of pressure in
at least one tire.
>Carefully bring the vehicle to a halt,
avoiding abrupt steering and braking
maneuvers. Observe the traffic situation
around you
.
>Check and correct tire inflation pressure
as required (
page 190).
G
Warning!
Driving with the brake warning lamp illu
minated can result in an accident. Have
your brake system checked immediately
if the brake warning lamp stays on.
Do not add brake fluid before checking
the brake system.
Page 241 of 314
What to do if ...
240
>> Practical hints. If the tire inflation pressure in the respective
tire(s) has (have) been corrected, the combi
nation low tire pressure/TPMS malfunction
telltale goes out after a few minutes of driv
ing. See also "Restarting the TPMS"
(
page 194).
Flashes 60 seconds and then stays
illuminated:
• when there is a malfunction in the TPMS.
>Have the TPMS checked at an authorized
smart center.
After the malfunction has been remedied the
combination low tire pressure/TPMS mal
function telltale goes out after a few minutes
of driving.
G
Warning!
Each tire should be checked monthly
when cold and inflated to the inflation
pressure recommended by the vehicle
manufacturer on the Tire and Loading
Information placard on the driver’s door
BPillar (
page 185) . If your vehicle has
tires of a different size than the size in
dicated on the Tire and Loading Informa
tion placard you should determine the
proper tire inflation pressure for those
tires.
As an added safety feature, your vehicle
has been equipped with a tire pressure
monitoring system (TPMS) that illumi
nates a low tire pressure telltale when
one or more of your tires is significantly
underinflated.
Accordingly, when the low tire pressure
telltale illuminates, you should stop and
check your tires as soon as possible, and
inflate them to the proper pressure.
Driving on a significantly underinflated
tire causes the tire to overheat and can
lead to tire failure.
Underinflation also reduces fuel effi
ciency and tire tread life, and may affect
the vehicle’s handling and stopping
ability. Please note that the TPMS is not a
substitute for proper tire maintenance,
and it is the driver’s responsibility to
maintain correct tire pressure, even if
underinflation has not reached the level
to trigger illumination of the TPMS low
tire pressure telltale.
Your vehicle has also been equipped with
a TPMS malfunction indicator to indicate
when the system is not operating
properly. The TPMS malfunction indicator
is combined with the low tire pressure
telltale.
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.