Display
messages 274 Display messages Possible cause/consequence Possible solution
ò Replace air
cleaner element The engine air filter must be replaced. X
Visit a qualified specialist workshop. N Check engine oil
level when next
refuelling The engine oil level has dropped to a crit-
ical level. X
Check the engine oil level (Y page 222) and top
up the engine oil if necessary.
X Have the engine checked for leaks if the engine
oil needs topping up more often than usual. N Engine oil level
Consult workshop The engine oil level has dropped to a crit-
ical level or the measuring system is mal-
functioning.
33 X
Check the engine oil level (Y page 222).
If the engine oil level is OK:
X Visit a qualified specialist workshop.
If the engine oil level is not OK:
X Top up the engine oil.
X If the warning message disappears: consult a
qualified specialist workshop.
X If the warning message does not disappear: do
not drive on. Consult the nearest qualified spe-
cialist workshop. H Tyre pressure Cau-
tion, tyre defect
G
Risk of accident
At least one tyre is rapidly deflating. The
affected wheel is highlighted in the tyre
pressure display of the tyre pressure mon-
itor*. X
Stop the vehicle without making any sudden
steering or braking manoeuvres. Pay attention
to the traffic conditions as you do so.
X Repair or change the tyre (Y page 313).33
Only for certain vehicles. Practical advi
ce
* optional
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Display
messages 275Display messages Possible cause/consequence Possible solution
H Tyre pressure
Check tyres G
Risk of accident
The pressure in one or more tyres has
dropped significantly. The affected wheel
is highlighted in the tyre pressure display
of the tyre pressure monitor*. X
Stop the vehicle without making any sudden
steering or braking manoeuvres. Pay attention
to the traffic conditions as you do so.
X Check the tyres.
X Repair or change the faulty tyre if necessary
(Y page 313).
X Check the tyre pressure and correct it if nec-
essary (Y page 226).
The warning will disappear automatically after
you have been driving for a few minutes with
the corrected tyre pressure. H Please correct
tyre pressure(s) Vehicles with a tyre pressure monitor*:
the pressure of at least one tyre is too low
or there is a significant discrepancy
between the tyre pressures of the individ-
ual wheels. X
Check the tyre pressure at the next opportunity
and correct it if necessary ( Ypage 226). I Change key batter-
ies The KEYLESS GO* key batteries are dis-
charged. X
Change the batteries (Y page 305).I Key does not belong
to vehicle You have put the wrong key in the ignition
lock. X
Use the correct key. I Key not detected
The KEYLESS GO* key is not in the vehicle.
If the engine is switched off, the vehicle
can no longer be locked centrally and the
engine cannot be started. X
Stop the vehicle. Pay attention to the traffic
conditions as you do so.
X Look for the KEYLESS GO *key. Practical advice
* optional
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Troubleshooting
284 Problem 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 255).
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 34
. The seat belt warning lamp
reminds the driver and front
passenger to fasten their seat
belts. X
Fasten your seat belt (Y page 94).34
Only for certain vehicles. Practical advice
* optional
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Flat tyre
3151
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 207) or the
second row of seats (Y page 207).
! 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
* optional
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Flat tyre
316
If a pressure of 1.8 bar is not reached after
five minutes:
X Switch off and disconnect the electric air
pump and drive the vehicle forwards or
backwards approximately 10 m.
This distributes the TIREFIT more evenly.
X Remove TIREFIT sealant filler bottle 1
from the electric pump.
X Pump up the tyre again. G
Risk of accident
If a pressure of 1.8 bar is not achieved after
five minutes, the tyre is too badly damaged.
Do not drive any further. Consult a qualified
specialist workshop which has the neces-
sary specialist knowledge and tools to carry
out the work required. Mercedes-Benz rec-
ommends that you use a Mercedes-Benz
Service Centre for this purpose. In particu-
lar, work relevant to safety or on safety-
related systems must be carried out at a
qualified specialist workshop.
If a tyre pressure of 1.8 bar is reached:
X Press on/off switch 4on the electric air
pump to 0.
The electric air pump is switched off.
X Disconnect the electric air pump and stow
it away. X
Fold up the warning triangle and stow it
away.
X Pull away immediately.
This distributes the TIREFIT more evenly
around the tyre.
X Stop after driving for approximately ten
minutes and check the tyre pressure with
the electric air pump. G
Risk of accident
If the tyre pressure is now lower than
1.3 bar, the tyre is too badly damaged. Do
not drive any further. Consult a qualified
specialist workshop which has the neces-
sary specialist knowledge and tools to carry
out the work required. Mercedes-Benz rec-
ommends that you use a Mercedes-Benz
Service Centre for this purpose. In particu-
lar, work relevant to safety or on safety-
related systems must be carried out at a
qualified specialist workshop.
X If the tyre pressure is still at least 1.3 bar,
correct it (see fuel filler flap for values).
To increase the tyre pressure: switch on
the electric air pump. To reduce the tyre pressure:
open pres-
sure release screw aon pressure
gauge b.
X Drive to the nearest workshop and have the
tyre changed there.
X Have the TIREFIT kit replaced as soon as
possible at a qualified specialist workshop,
e.g. at a Mercedes-Benz Service Centre. G
Risk of accident
Do not exceed the maximum speed of
80 km/h.
The "max. 80 km/h" sticker must be affixed
within the driver's field of vision.
The vehicle's handling characteristics may
be affected. H
Environmental note
Have the used TIREFIT kit disposed of pro-
fessionally, e.g. at a Mercedes-Benz
Service Centre.
X Have the TIREFIT kit replaced every four
years at a qualified specialist workshop,
e.g. a Mercedes-Benz Service Centre. Practical advice
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Flat tyre
3201
Wheel bolts for 18", 19" and 21" wheels
and for the R 500 4MATIC emergency
spare wheel
2 Wheel bolts for 17" wheels and the emer-
gency spare wheel of all models except
the R 500 4MATIC
! All models except the R 500 4MATIC:
always use wheel bolts 2to fit 17" wheels
or the emergency spare wheel. Using other
wheel bolts when fitting 17" wheels or the
emergency spare wheel could damage the
brake system.
i All models except the R 500 4MATIC: the
wheel bolts can be found together with the
emergency spare wheel (not with 17"
tyres). X
Clean the wheel and wheel hub contact
surfaces. X
Slide the emergency spare wheel onto the
centring pin and push it on. X
Tighten the wheel bolts until they are fin-
ger-tight. X
Unscrew the centring pin.
X Tighten the last wheel bolt until it is finger-
tight.
Inflating the "Minispare" emergency
spare wheel* G
Risk of accident
Pump up the collapsible emergency spare
wheel before lowering the vehicle, as you
could otherwise damage the wheel rim.
X Take the electric air pump out of the stow-
age well under the luggage compartment
floor (Y page 252). G
Risk of injury
Comply with the manufacturer’s safety
instructions on the sticker on the electric
air pump.
Your vehicle is equipped with one of the fol-
lowing two electric air pumps:
R Version 1: electric air pump with a pres-
sure gauge on the air hose.
R Version 2: electric air pump with an inte-
grated pressure gauge.
The following description applies for both
types. Differences in the way they are used
will be explained explicitly. Practical advice
* optional
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Flat tyre
321Version 1
1
Flap
2 On/off switch
3 Electric connector with cable
4 Air pump hose with pressure gauge and
pressure release screw
5 Union nut Version 2
2
On/off switch
3 Electric connector with cable
4 Pressure gauge
5 Union nut
6 Pressure release button
X Version 1: open flap1.
X Version 1: pull connector 3and air hose
4 out of the housing.
X Version 2: pull connector 3and the air
hose out of the housing.
X Version 1: make sure that pressure
release screw 4on the pressure gauge is
closed.
X Remove the cap from the valve on the tyre.
X Screw union nut 5on the air hose onto the
valve. X
Make sure on/off switch 2of the electric
pump is set to 0.
X Insert connector 3into the socket in the
luggage compartment (Y page 207) or the
second row of seats (Y page 207).
! The socket /cigarette lighter *in the front
centre console is not designed for operat-
ing the electric air pump.
X Vehicles with a key: make sure that the
key is turned to position 2(Y page 76) in
the ignition lock.
or
X Vehicles with KEYLESS GO: press the
KEYLESS GO button twice.
X Press on/off switch 2on the electric air
pump to I.
The electric air pump is switched on. The
tyre is inflated.
X When a tyre pressure of 3.0 bar has been
reached, press 0on the electric air pump
on/off switch.
The electric air pump is switched off.
! Do not operate the electric air pump for
longer than eight minutes at a time without
a break. Otherwise, it may overheat. Practical advice
* optional
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Flat tyre
322The air pump can be operated again once
it has cooled down.
If the tyre pressure is higher than 3.0 bar:
X Version 1: open pressure release
screw 4on the pressure gauge until the
tyre pressure is correct.
X Version 2: press pressure release button
6 until the tyre pressure is correct.
X Switch off the electric air pump with on/off
switch 2, remove from the tyre valve and
stow it away.
Lowering the vehicle X
Place the ratchet ring spanner onto the
hexagon nut of the jack so that the lettering
AB is visible.
X Lower the vehicle by turning the ratchet
ring spanner until the vehicle is once again
standing firmly on the ground.
X Place the jack to one side. 1
–5 Wheel bolts
X Tighten the wheel bolts evenly in a cross-
wise pattern in the sequence indica-
ted (1 to5). The tightening torque is
150 Nm . G
Risk of accident
Have the tightening torque checked imme-
diately after a wheel is changed. The wheels
could work loose if they are not tightened
to a torque of 150 Nm.
X Turn the jack back to its initial position and
stow it and the rest of the vehicle tool kit in
the luggage compartment. X
Transport the faulty wheel in the boot.
or
X Depending on the size of the wheel, you
may also be able to secure the faulty wheel
in the emergency spare wheel well. In this
case, you will have to remove the stowage
tray from the emergency spare wheel well
and stow it securely in the luggage com-
partment.
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. Practical advice
* optional
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