2025-2026 Mercedes G Class SUV Breakdown assistance -> Flat tyre User Manual
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Breakdown assistance -> Flat tyre for Your Mercedes G Class SUV Fifth Generation (2025-2026)

591
Flat tyre
Notes on flat tyres
&
WARNING
Risk of accident due to a flat tyre
A flat tyre strongly impairs the vehicle's driving characteristics, as well
as its steering and braking characteristics.
#
Do not drive with a flat tyre.
#
Replace the flat tyre with the spare wheel. Alternatively, con‐
sult a qualified specialist workshop.
IN THE EVENT OF A FLAT TYRE, THE FOLLOWING OPTIONS ARE AVAILA‐
BLE DEPENDING ON YOUR VEHICLE'S EQUIPMENT:
R
Vehicles with Mercedes-Benz Support: in the event of a break‐
down, you can make a breakdown call via the overhead control panel
(/page515).
R
All vehicles: change the wheel (/page623).
Using the TIREFIT kit
Requirements:
R
Tyre sealant bottle and tyre inflation compressor are ready for use
(/page623).
R
TIREFIT sticker is displayed.
R
Gloves are at hand.
You can use TIREFIT tyre sealant to seal perforation damage of up to 4 mm,
particularly on the tyre contact surface. You can use TIREFIT in outside tem‐
peratures down to -20 °C.
&
WARNING
Risk of accident when using tyre sealant
The tyre sealant may be unable to seal the tyre properly, especially in
the following cases:
R
there are large cuts or punctures in the tyre (larger than damage
previously mentioned)
R
the wheel rims have been damaged
R
after journeys with very low tyre pressure or with flat tyres
#
Do not continue driving.
#
Consult a qualified specialist workshop.
G-Class - Owner's Manual
Breakdown assistance Flat tyre
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592
&
WARNING
Risk of injury and poisoning from tyre sealant
Tyre sealant is hazardous to health and causes irritation. Do not allow
it to come into contact with your skin, eyes or clothing, and do not
swallow it. Do not inhale any vapours. Keep the tyre sealant away from
children.
Observe the following if you come into contact with the tyre sealant:
#
Rinse off the tyre sealant from your skin using water immedi‐
ately.
#
If tyre sealant gets into your eyes, thoroughly rinse them using
clean water immediately.
#
If tyre sealant has been swallowed, thoroughly rinse out your
mouth immediately and drink plenty of water. Do not induce
vomiting and seek medical attention immediately.
#
Change out of clothing which has come into contact with tyre
sealant immediately.
#
If an allergic reaction occurs, seek medical attention immedi‐
ately.
*
NOTE
Overheating due to the tyre inflation compressor running too long
#
Do not run the tyre inflation compressor for longer than ten
minutes without interruption.
Observe the manufacturer's safety notes on the sticker on the tyre inflation
compressor.
Have the tyre sealant bottle replaced at a qualified specialist workshop every
five years.
#
Do not remove any foreign objects that have pierced the tyre.
#
Affix part 1 of the TIREFIT sticker onto the driver display within the
driver's field of vision.
#
Affix part 2 of the TIREFIT sticker near the valve on the wheel with the
defective tyre.
G-Class - Owner's Manual
Breakdown assistance Flat tyre
F465 0034 02
593
#
Pull the plug 4 with cable and hose 5 out of the tyre inflation com‐
pressor housing.
#
Push the plug of the hose 5 into the flange 6 of the tyre sealant bottle
1 until the plug engages.
#
Insert the tyre sealant bottle 1 with the head pointing downwards into
the recess
2 of the tyre inflation compressor.
#
Remove the valve cap from the valve 7 of the defective tyre.
#
Screw the filling hose 8 onto the valve 7.
#
Insert the plug 4 into the 12‑V‑socket at the front of the centre console
(/page222).
#
Switch on the vehicle.
#
Switch on the tyre inflation compressor using the on/off switch 3.
The tyre is inflated. First, tyre sealant is pumped into the tyre. The
pressure may briefly rise to approximately 500kPa (5.0bar/73psi).
Do not switch off the tyre inflation compressor during this phase!
#
Allow the tyre inflation compressor to run for a maximum of ten minutes.
The tyre should then have reached a tyre pressure of at least 200kPa
(2.0bar/29psi).
If tyre sealant leaks out, ensure that the affected area is cleaned as quickly as
possible. Ideally, use clean water.
If you get tyre sealant on your clothing, have it cleaned with perchloroethylene
at a dry cleaner's as soon as possible.
IF, AFTER TEN MINUTES, A TYRE PRESSURE OF 200KPA (2.0BAR/29PSI)
IS NOT REACHED:
#
Switch off the tyre inflation compressor.
#
Unscrew the filling hose from the valve of the defective tyre.
Please note that tyre sealant may leak out when unscrewing the filling hose.
#
Drive the vehicle forwards or in reverse very slowly for approximately
10 m.
G-Class - Owner's Manual
Breakdown assistance Flat tyre
F465 0034 02
594
#
Inflate the tyre again.
After a maximum of ten minutes the tyre pressure must be at least
200kPa (2.0bar/29psi).
&
WARNING
Risk of accident due to the specified tyre pressure not being
attained
If the specified tyre pressure is not attained after the specified time,
the tyre is too badly damaged. The tyre sealant cannot repair the tyre in
this instance.
The braking and driving characteristics may be greatly impaired.
#
Do not continue driving.
#
Consult a qualified specialist workshop.
IF, AFTER TEN MINUTES, A TYRE PRESSURE OF 200KPA (2.0BAR/29PSI)
IS REACHED:
#
Switch off the tyre inflation compressor.
#
Unscrew the filling hose from the valve of the defective tyre.
&
WARNING
Risk of accident from driving with sealed tyres
A tyre temporarily sealed with tyre sealant impairs the handling charac‐
teristics and is not suitable for higher speeds.
#
Adapt your driving style accordingly and drive carefully.
#
Do not exceed the maximum speed limit with a tyre that has
been repaired using tyre sealant.
#
Observe the maximum permissible speed of 80 km/h for a tyre sealed
with tyre sealant.
*
NOTE
Staining from leaking tyre sealant
After use, excess tyre sealant may leak out from the filling hose.
#
Therefore, place the filling hose in the plastic bag that con‐
tained the TIREFIT kit.
+
ENVIRONMENTAL NOTE
Environmental pollution caused by environmentally irresponsible
disposal
Tyre sealant contains pollutants.
#
Have the tyre sealant bottle disposed of professionally, e.g. at
a Mercedes-Benz Service Centre.
G-Class - Owner's Manual
Breakdown assistance Flat tyre
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#
Stow the tyre sealant bottle and the tyre inflation compressor.
#
Pull away immediately.
#
Stop driving after approximately ten minutes and check the tyre pressure
using the tyre inflation compressor.
The tyre pressure must now be at least 130kPa (1.3bar/19psi).
&
WARNING
Risk of accident due to the specified tyre pressure not being
attained
If the specified tyre pressure is not reached, the tyre is too badly
damaged. The tyre sealant cannot repair the tyre in this instance.
The braking and driving characteristics may be greatly impaired.
#
Do not continue driving.
#
Consult a qualified specialist workshop.
Countries that have Mercedes-Benz Service24h: you will find a sticker with
the telephone number, e.g. on the B‑pillar on the driver's side.
#
Correct the tyre pressure if it is still at least 130kPa (1.3bar/19psi).
Refer to the tyre pressure table on the B‑pillar on the driver's side.
#
To increase the tyre pressure: switch on the tyre inflation compressor.
#
To reduce the tyre pressure: press the pressure release button 1 next
to the manometer
2.
#
When the tyre pressure is correct, unscrew the filling hose from the
valve of the sealed tyre.
#
Screw the valve cap onto the valve of the sealed tyre.
#
Pull the tyre sealant bottle out of the tyre inflation compressor.
The filling hose remains on the tyre sealant bottle.
#
Drive to the nearest qualified specialist workshop and have the tyre, tyre
sealant bottle and filling hose replaced.
G-Class - Owner's Manual
Breakdown assistance Flat tyre
F465 0034 02
596
Overview of spare wheel carriers on the rear
door
STAINLESS-STEEL SPARE WHEEL CARRIER
&
WARNING
Risk of injury when changing a wheel
The wheels are very heavy. When being removed, a wheel can tip over
or roll away uncontrollably. As a result, you or other persons could be
hit by the wheel.
#
Have a second person assist you in removing the wheel.
Removing the stainless-steel spare wheel cover
#
Remove screwdriver 4 from the vehicle tool kit (/page623).
#
Open the lock on cover ring 1 with screwdriver 4.
#
Fold tab 3 down.
#
Pull cover ring 1 apart and remove it.
#
Remove cover panel 2.
Removing the spare wheel
#
Remove wheel nuts 5.
#
Remove spare wheel
Attaching the wheel to the spare wheel carrier
#
Use the wheel nuts to attach the defective wheel 5 to the spare wheel
carrier. Specified tightening torque: 20 Nm
#
Position cover panel 2 again. Make sure that retainer 6 of cover panel
2 engages in recess 7.
#
Attach cover ring 1 again and close the lock.
G-Class - Owner's Manual
Breakdown assistance Flat tyre
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597
%
Make sure that the lock does not cover the reversing camera. If
necessary, turn cover ring
1 slightly.
SPARE WHEEL CARRIER WITH PROTECTIVE TYRE COVER
Removing the protective tyre cover
#
Pull protective tyre cover 1 on the rear side apart and remove it.
Removing the wheel from the spare wheel carrier and attaching the defec‐
tive wheel
#
Remove wheel nuts 2.
#
Remove spare wheel
#
Use the wheel nuts to attach the defective wheel 2 to the spare wheel
carrier. Specified tightening torque: 20 Nm
G-Class - Owner's Manual
Breakdown assistance Flat tyre
F465 0034 02

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