
Problem Possible causes/consequences and
M Solutions
?
The red coolant warn-
ing lamp comes on
while the engine is run-
ning.
The coolant level is too low.
If the coolant level is correct, the airflow to the engine radiator
may be blocked or the electric engine radiator fan may be mal-
functioning.
The coolant is too hot and the engine is no longer being cooled
sufficiently.
X
Observe the additional display messages in the multifunction
display.
X Stop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine.
X Let the engine and coolant cool down.
X Check the coolant level and top up the coolant (Y page 324).
Observe the warning notes as you do so.
X If you have to top up the coolant frequently, have the engine
cooling system checked.
X Make sure that the air supply to the engine radiator is not
blocked, e.g. by frozen slush.
X If the coolant temperature is less than 120 †, you can continue
driving to the nearest qualified specialist workshop.
X Avoid heavy loads on the engine as you do so, e.g. driving on
mountain roads and stop-start traffic. ?
The red coolant warn-
ing lamp comes on
while the engine is run-
ning. A warning tone
also sounds.
The coolant temperature has exceeded 120 †. The airflow to the
engine radiator may be blocked or the coolant level may be too
low.
The engine is not being cooled sufficiently and may be damaged.
X Observe the additional display messages in the multifunction
display.
X Stop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine.
X Let the engine and coolant cool down.
X Check the coolant level and top up the coolant (Y page 324).
Observe the warning notes as you do so.
X If you have to top up the coolant frequently, have the engine
cooling system checked.
X Make sure that the air supply to the engine radiator is not
blocked, e.g. by frozen slush.
X If the coolant temperature is less than 120 †, you can continue
driving to the nearest qualified specialist workshop.
X Avoid heavy loads on the engine as you do so, e.g. driving on
mountain roads and stop-start traffic. 286
Warning and indicator lamps in the instrument clusterOn-board computer and displays

Driving systems
Problem Possible causes/consequences and
M Solutions
·
The red distance warn-
ing lamp lights up while
the vehicle is in motion.
G
Risk of accident
The distance to the vehicle in fron tis too small for the speed
selected.
X Increase the distance. ·
The red distance warn-
ing lamp lights up while
the vehicle is in motion.
Aw
arning tone also
sounds. G
Ris
kofa ccident
You are approaching a vehicle or a stationary obstacle in your line
of travel at too high a speed.
X Be prepared to brake immediately.
X Pay careful attention to the traffic situation. You may have to
brake or take evasive action.
More information about DISTRONIC PLUS (Y page 185) and
PRE-SAFE ®
Brake (Y page 75). Tyres
Problem Possible causes/consequences and
M Solutions
h
The yellow tyre pres-
sure monitor warning
lamp is on.
G
Ris
kofa ccident
The tyre pressure monito rhas detected a loss of pressure in at
least one of the tyres.
X Stop the vehicle without making any sudde nsteering or braking
manoeuvres .Pay attentio nto the traffic conditions as you do
so.
X Observe the additional display messages in the multifunction
display.
X Check the tyre pressure. If necessary, correc tthe tyre pressure
(Y page 368).
X If necessary, change a wheel (Y page 370). Warning and indicator lamps in the instrument cluster
287On-board computer and displays Z

Useful information
i This Owner's Manual describes all models
and all standard and optional equipment
available to your vehicle at the time of pub-
lication of the Owner's Manual. Country-
specific deviations are possible. Please
note that your vehicle may not be equipped
with all features described. This also
applies to safety-relevan tsystems and
functions.
i Please read the information on qualified
specialist workshops (Y page 25).Loading guidelines
G
WARNING
Secure and position the load as described in
the loading guidelines.
Otherwise, vehicle occupants could
be injured by the load being throw naround in
the event of sharp braking, a sudden change
in direction or an accident.
You will find further informatio ninthe "Secur-
ing a load" section.
Even if you follow all the loading guidelines,
the load will increase the risk of injury in the
event of an accident. G
WARNING
Keep the boot lid/tailgate closed while the
vehicle is in operation. Otherwise, exhaust
fumes could enter the vehicle interior and poi-
son you.
The handling characteristics of a laden vehi-
cle are dependent on the distribution of the
load within the vehicle. For this reason, you
should observe the following notes when
transporting a load:
R when transporting a load, never exceed the
maximum permissible gross vehicle weight or the permissible axle loads for the vehicle
(including occupants).
R position heavy loads as far forwards as pos-
sible and as low down in the boot/luggage
compartmenta s possible.
R the load must not protrude above the upper
edge of the seat backrests.
R always place the load against the rear or
front seat backrests. Make sure that the
seat backrests are securely locked into
place.
R always place the load behind unoccupied
seats if possible.
R secure the load with sufficiently strong and
wear-resistant lashing material. Pad sharp
edges for protection.
i Lashing material is available at any quali-
fied specialist workshop. Stowage areas
Stowage compartments
Important safety notes G
WARNING
The stowage compartments must be closed
when items are stored in them. Luggage nets
are not designed to secure heavy items of
luggage.
You or other vehicle occupants could be
injured by objects being thrown around if you:
R brake sharply
R change direction suddenly
R are involved in an accident
Sharp-edged and fragile objects must not be
placed in the luggage net.
Do not place hard objects in the map pockets.
Objects must not protrude from the map
pockets. 290
Stowage areasStowing and features

X
To open: fold down sea tarmrest ;.
X Fold cover :of the armrest upwards. Vehicles with luxury single seats in the rear com-
partment
X Pull handle :upwards.
The armrest folds out.
Stowage net in the rear compartment Vehicles with rear bench seat
:
Stowage net Vehicles with luxury single seats in the rear com-
partment
:
Handle strip
; Stowage net
X Pull handle strip :on the upper edge of
the cover forwards until it is released from
its anchorage.
X Fold downt he cover in the direction of the
arrow. Luggage nets
G
WARNING
Only place lightweight objectsint he luggage
net. Do not use it to transport heavy, sharp-
edged or fragile objects. The luggage net can-
not secure the objects sufficiently in the event
of an accident.
Luggage nets are located in the front-
passenger footwell and on the left and right-
hand sides of the boot/luggage compart-
ment. Skibag
Unfolding the skibag and loading skis G
WARNING
The skibag is designed to carry up to four pairs
of skis. Do not use the skibag to carry any
other type of load. Stowage areas
293Stowing and features
Z

Removing the skibag
G
WARNING
Whe nthe skibag has been removed, always
drive with the boot lid closed. Otherwise,
exhaust fumes could enter the vehicle inte-
rior.
The skibag can be removed for cleaning or
drying.
X Open the boot lid. X
Press release button :.
Flap ;folds down.
X Press catch =in and pull out frame ?
containing the skibag. Through-loading facility in the rear
compartment
The through-loading facility is opened from
the boot. X
Fold down the rear seat armrest.
X Press release button :.
The flap opens downwards. Through-loading facility in the rear
bench seat (Saloon)
Important safety notes G
WARNING
Do not carry heavy or hard objects inside the
vehicle or in the boot unless they are secured.
Otherwise, you and other vehicle occupants
could be injured by objectsb eing thrown
around the vehicle in the event of sharp brak-
ing, a sudden change in direction or an acci-
dent. G
WARNING
Always drive with the boot lid closed. Exhaust
fumes could otherwise enter the vehicle inte-
rior.
The left-hand and right-hand rear seat backr-
ests can be folded down separately to
increase the boot capacity.
Folding the seat backrest forwards !
Before you fold down the rear seat back-
rest, remove the side head restraints for
the integrated child seat; see the "Side
head restraints for integrated child seat"
section. The side head restraints could oth-
erwise be damaged. Stowage areas
295Stowing and features Z

i
Vehicles with memory function: when you
fold one or both parts of the rear seat back-
rest forwards, the respective front seat
moves forward slightly, when necessary, in
order to avoid contact.
X Vehicles without memory function: if nec-
essary, move the driver's or front-
passenger seat forwards.
X Open the boot.
X Pull right-hand or left-hand rear seat back-
rest release handle :.
The corresponding rear seat backrest is
released and the rear seat head restraints
are lowered. X
Fold rear seat backrest ;forwards.
X Move the driver's or front-passenger seat
back if necessary.
Folding back the seat backrest X
Move the driver's or front-passenger seat
forward if necessary.
! Make sure that the seat belt does not
become trapped when folding the rear seat backrest back. Otherwise, it could be dam-
aged.
X Fold rear seat backrest :back until it
engages. G
WARNING
Make sure that the rear seat backrest is cor-
rectly engaged. Otherwise, vehicle occupants
could be injured by objects being thrown
around if you:
R brake sharply
R change direction suddenly
R are involved in an accident
If the rear seat backrest is not engaged, this
will be shown in the multifunction display in
the instrument cluster.
i You should always engage the rear seat
backrests if you do not need the through-
loading feature. This will prevent unauthor-
ised access to the boot from the vehicle
interior.
X Adjust the head restraints if necessary
(Y page 108).
X Move the driver's or front-passenger seat
back if necessary. EASY-PACK through-loading facility in
the rear bench seat (Estate)
Important safety notes G
WARNING
Do not carry heavy or hard objects inside the
vehicle or in the luggage compartment unless
they are secured.
Otherwise, you and other vehicle occupants
could be injured by objects being thrown
around the vehicle in the event of sharp brak-
ing, a suddenc hange in direction or an acci-
dent.
When using the enlarged luggage compart-
ment, always clip in the safety net. 296
Stowage areasStowing and features

G
WARNING
Always drive with the tailgate closed .Exhaust
fumes could otherwise enter the vehicle inte-
rior.
Folding the rear seat backrest forward The left-hand and right-hand rea
rseat backr-
ests can be folded forwards separately to
increase the luggage compartment capacity.
The combined luggage cover and net can
remain installed.
! Before you fold down the rear seat back-
rest, remove the side head restraints for
the integrated child seat; see the "Side
head restraints for integrated child seat"
section. The side head restraints could oth-
erwise be damaged.
! When folding the rear seat backrest for-
wards, ensure that there are no items lying
on the seat cushions .These items could
otherwise be damaged or could themselves
damage the rear seats.
i When you fold one or both parts of the
rear seat backrests forwards, the headr-
ests are also lowered if necessary. In the
case of vehicles with memory function, the
respective front seat is moved forwards
slightly to avoid contact with the seat
behind it. X
Vehicles without memory function: if nec-
essary, move the driver's or front-
passenger seat forwards.
X Pull the left-hand or right-hand release han-
dle at the rear in load compartment :or
at the side beside backrests ;.
The corresponding backrest folds for-
wards.
X Move the driver's or front-passenger seat
back if necessary.
Folding the rear seat backrest back X
Move the driver's or front-passenger seat
forward if necessary.
! Make sure that the seat belt does not
become trapped when folding the rear seat
backrest back. Otherwise, it could be dam-
aged.
X Fold seat backrest :back until it engages. G
WARNING
Make sure that the rear seat backrest is cor-
rectly engaged. Otherwise, vehicle occupants Stowage areas
297Stowing and features
Z

could be injured by objects being thrown
around if you:
R
brake sharply
R change direction suddenly
R are involved in an accident
If the rea rseat backrest is not engaged, this
will be shown in the multifunction display in
the instrument cluster.
X Adjust the head restraints if necessary
(Y page 108).
X Move the driver's or front-passenger seat
back if necessary. Securing
aload
Plastic hooks (Saloon) On vehicles without a through-loading feature
in the rear bench seat, six plastic hooks are
fitted to the boot floor. You can use these to
attach the luggage securing fixture, which is
available as an accessory.
Lashing eyelets
G
WARNING
Distribute the load on the lashing eyelets
evenly.
Otherwise, vehicle occupants could be
injured by objects being thrown around if you:
R brake sharply
R change directio nsuddenly
R are involved in an accident Please observe the loading guidelines.
Observe the following notes on securing
loads:
R secure the load using the lashing eyelets.
R do no tuse elastic straps or nets to secure
a load, as these are only intended as an
anti-slip protection for light loads.
R do not route lashing materials across sharp
edges or corners.
R pad sharp edges for protection.
There are six lashing eyelets in the boot/lug-
gage compartment. Saloon
:
Lashing eyelets Estate
:
Lashing eyelets 298
Stowage areasStowing and features