Get Breakdown assistance -> Flat tyre Guide for Mercedes A Class 4 Door Third Generation (2012-2017)

Flat tyre

340

no one is near the danger area while a

wheel is being changed. Anyone who is not

directly assisting in the wheel change

should, for example, stand behind the bar-

rier.

Get out of the vehicle. Pay attention to traf-

fic conditions when doing so.

Flat tyre

Preparing the vehicle

Your vehicle may be equipped with:

MOExtended tyres (tyres with run-flat char-

acteristics) (Y page 340)

Vehicle preparation is not necessary on

vehicles with MOExtended tyres.

Close the driver's door.

Place the warning triangle at a suitable dis-

tance (Y page 338). Observe legal require-

ments.

a TIREFIT kit (Y page 339)

an emergency spare wheel (certain coun-

tries only) (Y page 389)

Vehicles with MOExtended tyres are not

equipped with a TIREFIT kit at the factory. It is

therefore recommended that you additionally

equip your vehicle with a TIREFIT kit if you fit

tyres that do not feature run-flat characteris-

tics, e.g. winter tyres. A TIREFIT kit can be

obtained from a qualified specialist work-

shop.

MOExtended tyres (tyres with run-flat

characteristics)

General notes

With MOExtended tyres (tyres with run-flat

characteristics), you can continue to drive

your vehicle even if there is a total loss of

pressure in one or more tyres. The affected

tyre must not show any clearly visible dam-

age.

Information on changing and fitting a wheel

(Y page 367).

Stop the vehicle as far away as possible

from traffic on solid, non-slippery and level

ground.

Switch on the hazard warning lamps.

Secure the vehicle against rolling away

(Y page 184).

You can recognise MOExtended tyres by the

MOExtended marking which appears on the

tyre wall. You will find this marking next to the

tyre size designation, the load-bearing capa-

city and the speed index.

MOExtended tyres may only be used in con-

junction with an activated tyre pressure loss

warning system or tyre pressure monitor.

If a pressure loss warning message

appears in the multifunction display:

If possible, bring the front wheels into the

straight-ahead position.

Switch off the engine.

Vehicles without KEYLESS-GO: remove

the key from the ignition lock.

observe the instructions in the display mes-

^XVehicles with KEYLESS-GO start-func-

tion or KEYLESS-GO: open the driver's

door.

sages (Y page 283)

check the tyre for damage

The on-board electronics now have status

0. This is the same as the key having been

removed.

^XVehicles with KEYLESS-GO start-func-

tion or KEYLESS-GO: remove the Start/

Stop button from the ignition lock

(Y page 157).

if driving on, observe the following notes

The driving distance possible in run-flat mode

is approximately 80 km when the vehicle is

partially laden and approximately 30 km

when the vehicle is fully laden.

Make sure that the passengers are not

endangered as they do so. Make sure that

Flat tyre

341

In addition to the vehicle load, the driving dis-

tance possible depends upon:

holes, off-road). This applies in particular to a

laden vehicle.

vehicle speed

Stop driving in emergency mode if:

road condition

you hear banging noises.

outside temperature

the vehicle starts to shake.

The driving distance possible in run-flat mode

may be reduced by extreme driving condi-

tions/manoeuvres, or it can be increased

through a moderate style of driving.

The driving distance possible in run-flat mode

is counted from the moment the tyre pressure

loss warning appears in the multifunction dis-

play.

you see smoke and smell rubber.

ESP^®is intervening constantly.

there are tears in the sidewalls of the tyre.

After driving in emergency mode, have the

wheel rims checked at a qualified specialist

workshop with regard to their further use. The

faulty tyre must be replaced.

You must not exceed a maximum speed of

80 km/h.

When replacing one or all tyres, observe the

following specifications for your vehicle's

tyres:

TIREFIT kit

Important safety notes

TIREFIT is a tyre sealant.

You can use TIREFIT to seal punctures of up to

4 mm, particularly those in the tyre tread. You

can use TIREFIT at outside temperatures

down to Ò20 †.

size

type and

the "MOExtended" mark.

If a tyre has gone flat and cannot be replaced

with an MOExtended tyre, a standard tyre

may be used as a temporary measure. Make

sure that you use the proper size and type

(summer or winter tyre).

WARNING

In the following situations, the tyre sealant is

unable to provide sufficient breakdown assis-

tance, as it is unable to seal the tyre properly:

Vehicles with MOExtended tyres are not

equipped with a TIREFIT kit at the factory. It is

therefore recommended that you additionally

equip your vehicle with a TIREFIT kit if you fit

tyres that do not feature run-flat characteris-

tics, e.g. winter tyres. A TIREFIT kit can be

obtained from a qualified specialist work-

shop.

there are cuts or punctures in the tyre

larger than those mentioned above.

the wheel rim is damaged.

you have driven at very low tyre pressures

or on a flat tyre.

There is a risk of an accident.

Do not drive any further. Contact a qualified

specialist workshop.

Important safety notes

WARNING

The tyre sealant is harmful and causes irrita-

tion. It must not come into contact with your

skin, eyes or clothing or be swallowed. Do not

inhale TIREFIT fumes. Keep tyre sealant away

from children. There is a risk of injury.

When driving in emergency mode, the driving

characteristics deteriorate, e.g. when corner-

ing, accelerating quickly and when braking.

There is a risk of accident.

Do not exceed the stated maximum speed.

Avoid abrupt steering and driving manoeu-

vres, and driving over obstacles (kerbs, pot-

Flat tyre

342

underneath the luggage compartment floor

(Y page 339).

If you come into contact with the tyre sealant,

observe the following:

Affix part : of the TIREFIT sticker to the

instrument cluster within the driver's field

of vision.

Affix part ; of the TIREFIT sticker near the

valve on the wheel with the defective tyre.

Rinse off the tyre sealant from your skin

immediately with water.

If the tyre sealant comes into contact with

your eyes, immediately rinse them thor-

oughly with clean water.

If tyre sealant is swallowed, immediately

rinse your mouth out thoroughly and drink

plenty of water. Do not induce vomiting,

and seek medical attention immediately.

Immediately change out of clothing which

has come into contact with tyre sealant.

If an allergic reaction occurs, seek medical

attention immediately.

! Do not operate the tyre inflation com-

pressor for longer than ten minutes at a

time without a break. It may otherwise

overheat.

The tyre inflation compressor can be oper-

ated again once it has cooled down.

Remove filler hose B and connector =

from the bottom section of tyre inflation

compressor housing ;.

Slide the yellow filler hose connector into

the mounting on yellow cap A of tyre seal-

ant bottle : until the connector engages.

With the sealing rings in front, slide yellow

cap A of tyre sealant bottle : into the

holder of tyre inflation compressor ;.

Yellow cap A and both hooks must

engage.

Comply with the manufacturer’s safety

instructions on the sticker on the tyre infla-

tion compressor.

Using the TIREFIT kit

Do not remove any foreign objects which

have penetrated the tyre, e.g. screws or

nails.

Remove the tyre sealant bottle, the accom-

panying TIREFIT sticker and the tyre infla-

tion compressor from the stowage well

Remove the cap from valve C on the faulty

tyre.

Screw filler hose D onto valve C.

Insert plug = into a 12 V socket in your

vehicle.

Flat tyre

343

Observe the notes on sockets

(Y page 316).

WARNING

If the required tyre pressure is not reached

after the specified time, the tyre is too badly

damaged. The tyre sealant cannot repair the

tyre in this instance. Damaged tyres and a tyre

pressure that is too low can significantly

impair the vehicle's braking and driving char-

acteristics. There is a risk of accident.

Turn the key to position 1 in the ignition

lock (Y page 157).

Press on and off switch ? on the tyre infla-

tion compressor to ON.

The tyre inflation compressor is switched

on. The tyre is inflated.

Do not continue driving. Contact a qualified

specialist workshop.

First, tyre sealant is pumped into the tyre.

The pressure may briefly rise to approx-

imately 500 kPa (5 bar/73 psi).

Do not switch off the tyre inflation com- Tyre pressure reached

pressor during this phase.

WARNING

Let the tyre inflation compressor run for a

maximum of ten minutes. The tyre should

then have attained a pressure of at least

200 kPa (2.0 bar/29 psi).

A tyre temporarily sealed with tyre 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 tyre that

has been repaired using tyre sealant.

If a pressure of 200 kPa (2.0 bar/29 psi) has

been attained after five minutes, see "Tyre

pressure reached" (Y page 343).

If a tyre pressure of 200 kPa (2.0 bar/29 psi)

has not been attained after five minutes, see

"Tyre pressure not reached" (Y page 343).

If tyre sealant leaks out, make sure you clean

the affected area as quickly as possible. It is

preferable to use clear water.

If you get tyre sealant on your clothing, have it

cleaned as soon as possible with perchloro-

ethylene.

The maximum permissible speed for a tyre

sealed with tyre sealant is 80 km/h. The

upper part of the TIREFIT sticker must be

affixed to the instrument cluster where it will

be easily seen by the driver.

! After use, excess tyre sealant may run out

of the filler hose. This could cause stains.

Therefore, place the filler hose in the plastic

bag which contained the TIREFIT kit.

Tyre pressure not reached

If a tyre pressure of 200 kPa (2.0 bar/29 psi)

has not been attained after ten minutes:

Environmental note

Have the used tyre sealant bottle disposed of

professionally, e.g. at a qualified specialist

workshop.

Switch off the tyre inflation compressor.

Unscrew the filler hose from the valve of

the faulty tyre.

Please note that tyre sealant may leak out

when unscrewing the filler hose.

Very slowly drive forwards or reverse

approximately 10 m.

If a tyre pressure of 200 kPa (2.0 bar/29 psi)

has been attained after ten minutes:

Switch off the tyre inflation compressor.

Unscrew the filler hose from the valve of

the faulty tyre.

Pump up the tyre again.

After a maximum of ten minutes, the tyre

pressure must be at least200 kPa(2.0 bar/

29 psi).

Breakdown assistance -> Flat tyre for Your Mercedes A Class 4 Door Third Generation (2012-2017)

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