Troubleshooting
291Problem Possible cause/consequence Suggested solutions
±
The yellow engine diagnos-
tics warning lamp comes
on while the engine is run-
ning. Vehicles with a diesel engine: the
fuel tank has run dry. X
Start the engine three to four times after refuelling.
Emergency running mode is cancelled. The vehicle need not be
checked. ±
The yellow engine diagnos-
tics warning lamp comes
on while the engine is run-
ning. There may be a malfunction:
R
in the fuel injection system
R in the exhaust system
R in the ignition system (on vehi-
cles with a petrol engine)
The emission limit values may be
exceeded and the engine may be
running in emergency mode. X
Have the vehicle checked as soon as possible at a qualified spe-
cialist workshop. H
The yellow tyre pressure
monitor* warning lamp is
on. G
Risk of accident
The tyre pressure monitor* has
detected a sudden or significant
pressure loss in at least one of
the tyres. X
Stop the vehicle without making any sudden steering or braking
manoeuvres. Pay attention to the traffic conditions as you do so.
X Observe the additional messages in the multi-function display
(Y page 259).
The warning light will go out after the flat tyre has been changed
and you have been driving for a few minutes. <
The red seat belt warning
lamp lights up for 6 sec-
onds after the engine
starts up 33
. The seat belt warning lamp
reminds the driver and front
passenger to fasten their seat
belts. X
Fasten your seat belt (Y page 89).33
Only for certain vehicles. Practical advice
* optional
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Flat tyre
323Flat tyre
Flat tyre equipment variants
Your vehicle may be equipped with:
R a TIREFIT kit (Y page 255)
R a "Minispare" emergency spare
wheel* (Y page 256)
R a collapsible emergency spare
wheel* (Y page 258)
R a spare wheel* (Y page 256)
R the MOExtended run-flat sys-
tem* (Y page 333) Preparing the vehicle
i Vehicle preparation is not necessary on
vehicles with MOE tyres*.
X Make sure that highway level* is selec-
ted 37
(Y page 158).
X Stop your vehicle as far away from traffic
as possible on solid, non-slippery, level
ground.
X Switch on the hazard warning lamps. X
Firmly depress the parking brake.
X Move the selector lever to P.
X All occupants must get out of the vehicle.
Make sure that they are not endangered as
they do so.
X Make sure that no one is near the danger
area whilst a wheel is being changed. Any-
one who is not directly assisting in the
wheel change should, for example, stand
behind the barrier.
X Switch off the engine.
Vehicles without KEYLESS GO* X
Remove the key from the ignition lock.
Vehicles with KEYLESS GO* X
Open the driver's door.
The on-board electronics have status 0,
which is the same as the key having been
removed.
X Vehicles with the AIRMATIC package* and
the Off-Road Pro engineering package*:
Remove the KEYLESS GO button from the
ignition lock. For all vehicles X
Get out of the vehicle.
X Close the driver's door.
X Place the warning triangle ( Ypage 254) at
a suitable distance. Observe legal require-
ments.
i To operate the electric air-pump, you can
use the power socket in the luggage com-
partment (Y page 205) or rear compart-
ment (Y page 205), even when the ignition
is switched off. For example, to use TIREFIT
or to inflate the collapsible emergency
spare wheel*.
An emergency cut-off ensures that the on-
board voltage does not drop too low. If the
on-board voltage is too low, power to the
sockets is automatically cut-off. This
ensures that there is sufficient power to
start the engine.
37 Not on steel-sprung vehicles. Practical advice
* optional
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Flat tyre
3251
TIREFIT sealant filler bottle
2 Flap
3 Recess
4 On/off switch
5 Electric connector with cable
6 Air pump hose
7 Flange
X Open flap 2on the electric air pump.
X Pull connector 5and air pump hose 6
from the housing.
X Screw air pump hose 6onto flange 7of
TIREFIT filler bottle 1.
X Place TIREFIT sealant filler bottle 1head
downwards into recess 3of the electric
air pump. 8
Filler hose
9 Valve
X Remove the cap from valve 9on the faulty
tyre. a
Pressure release screw
b Pressure gauge X
Make sure pressure release screw aon
pressure gauge bis fully closed.
X Screw filler hose 8onto valve 9.
X Insert connector 5into the socket in the
luggage compartment (Y page 205) or in
the rear compartment (Y page 205).
! The socket /cigarette lighter *in the front
centre console is not designed for operat-
ing the electric air pump.
X Press on/off switch 4on the electric air
pump to I.
The electric air pump is switched on. The
tyre is inflated.
i First, TIREFIT is pumped into the tyre. The
pressure can briefly rise to around 5 bar.
Do not switch off the electric pump dur-
ing this phase.
X Let the electric pump run for five minutes.
The tyre should then have a pressure of at
least 1.8 bar.
! Do not operate the electric air pump for
longer than six minutes without a break.
Otherwise, it may overheat.
The air pump can be operated again once
it has cooled down. Practical advice
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Flat tyre
333
i
Do not activate the tyre pressure moni-
tor* until the deflated tyre has been
removed from the vehicle. MOExtended run-flat system*
The MOExtended run-flat system must only
be used in conjunction with the tyre pressure
loss warning system*.
! The maximum permissible distance which
can be driven in run-flat mode depends on
the load in the vehicle. It is 50 km if the
vehicle is partially laden and 30 km if fully
laden.
The maximum range that can be driven in
emergency operation is measured from the
point at which the pressure loss warning
message appears in the multi-function dis-
play.
You must not exceed a maximum speed of
80 km/h. G
Risk of accident
The handling characteristics of your vehicle
deteriorate in run-flat mode, for example: R
when cornering
R when braking
R when accelerating rapidly
Adapt your driving style accordingly and
avoid sudden changes in direction and sud-
den acceleration, as well as driving over
obstacles (i.e. kerbs, potholes), and driving
off-road. This is particularly the case when
the vehicle is heavily laden.
The maximum permissible distance that
can be driven in run-flat mode depends to
a large extent on the loads placed on the
vehicle. It can be shorter due to high
speeds, a heavy load, sudden acceleration
and/or manoeuvring, the road surface con-
dition, outside temperature, etc., or further
if you drive carefully and conservatively.
Do not continue to drive in run-flat mode if:
R you hear banging noises
R the vehicle starts to shake
R you see smoke and smell rubber
R ESP ®
is intervening constantly
R there are tears in the sidewalls of the tyre
After driving in run-flat mode, you must
have the rims checked for damage at a qualified specialist workshop which has the
necessary specialist knowledge and tools
to carry out the work required. The faulty
tyre must be replaced in every case.
Mercedes-Benz recommends that you use
a Mercedes-Benz Service Centre for this
purpose. In particular, work relevant to
safety or on safety-related systems must be
carried out at a qualified specialist work-
shop.
i On a vehicle with MOExtended tyres, only
use MOExtended spare tyres. These must
be of the size specified for the vehicle. Practical advice
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Tyres and wheels
354 Tyres and wheels
Points to remember
! For safety reasons, Mercedes-Benz rec-
ommends that you only use tyres which
have been approved specifically for your
vehicle by Mercedes-Benz. These tyres are
specially adapted for use with the control
systems, such as ABS or ESP ®
, and are
marked as follows:
R MO = Mercedes-Benz Original
R MOE = Mercedes-Benz Original Exten-
ded* (with run-flat characteristics)
If you use other tyres, Mercedes-Benz can-
not accept any responsibility for damage
which may occur. Information about tyres
can be obtained from any Mercedes-Benz
Service Centre.
i Vehicles with MOExtended run-flat sys-
tem are not equipped with the TIREFIT
kit* 38
.
It is therefore recommended that you addi-
tionally equip your vehicle with the TIREFIT
kit* when fitting tyres that do not feature
run-flat properties, e.g. winter tyres. i
A TIREFIT kit* is available from any quali-
fied specialist workshop, e.g. a Mercedes-
Benz Service Centre.
! If you fit tyres other than those tested and
recommended by Mercedes-Benz, charac-
teristics such as handling, noise levels and
fuel consumption, etc. could be adversely
affected. In addition, when driving with a
load, dimensional variations and different
tyre deformation characteristics could
cause the tyres to come into contact with
the bodywork and axle components. This
could result in damage to the tyres or the
vehicle.
i Further information about tyres and
wheels can be obtained from any
Mercedes-Benz Service Centre.
You will find a table of tyre pressures on the
inside of your vehicle's fuel filler flap. You
will find further information about tyre pres-
sures in the "Operation" section
(Y page 226).
38 Only for certain countries. Technical data
* optional
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Tyres and wheels
356 ML 350
ML 280 CDI
ML 320 CDI ML 420 CDI
ML 500
Winter tyres
44 255/50 R19 103 H M+S
. 255/50 R19 103 H M+S
. Winter tyres
42
,44 255/50 R19 107H XL M+S
.MOExt. 255/50 R19 107H XL M+S
.MOExt. Light-alloy wheels 8J x 19 H2 ET 60 8J x 19 H2 ET 60
20" Both axles
Summer tyres
45 265/45 R20 104 Y 265/45 R20 104 Y
Light-alloy wheels 8.5J x 20 H2 ET 55 8.5J x 20 H2 ET 55
42
Tyres with run-flat characteristics and only in combination with the tyre pressure loss warning system or tyre pressure monitor*.
43 All-terrain tyres for retrofitting. Only certain tyre brands are approved. Ask your Mercedes-Benz Service Centre for information.
44 Winter tyres with the symbol .next to the retrofitting label. Only certain tyre brands are approved. Ask your Mercedes-Benz Service Centre for information.
45 Snow chains not permitted. Technical data
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Tyres and wheels
359Spare wheel*
Your vehicle may be equipped with TIREFIT, a "Minispare"/collapsible emergency spare wheel* or a spare wheel* depending on the country,
the engine and the wheels fitted.
i Vehicles with MOExtended tyres (tyres with run-flat characteristics) are not equipped with a TIREFIT kit at the factory.
! The spare wheel* must be inflated to the maximum tyre pressure given in the table on the inside of the fuel filler flap. ML 350
ML 280 CDI / ML 320 CDI / ML 420 CDI ML 500
18" "Minispare" emer-
gency spare wheel*
50 Tyres T 155/90 - 18 113M —
Tyre pres-
sure 4.2 bar —
Wheels 4.0B x 18 H2 ET 40 —
19" "Minispare" emer-
gency spare wheel*
50 Tyres — T 155/80 R19 114M
Tyre pres-
sure — 4.2 bar
Wheels — 4.5B x 19 H2 ET 40
50
Use of snow chains not possible. Technical data
* optional
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