Operation
●
Additiona l
lights and other accessories in
front of the air inlet reduce the cooling effect
of the coolant. At high outside temperatures
and high engine loads, there is a risk of the
engine overheating.
● The front spoiler also ensures proper distri-
bution of the coo
ling air when the vehicle is
moving. If the spoiler is damaged this can re-
duce the cooling effect, which could cause
the engine to overheat. Seek specialist assis-
tance. Fuel level
Fig. 123
Fuel gauge. The display
6
› ›
› Fig. 121 on
ly works when
the ignition is switched on. When the display
reaches the reserve mark, the lower diode
lights up in red and the control lamp ap-
pears ››› page 96. When the fuel level is very
low, the lower diode flashes in red. The distance to empty fuel level is displayed
on the instrument p
anel 3
› ››
Fig. 121
.
Y ou c
an consult the tank capacity of your ve-
hicle in the ›››
page 40 section. CAUTION
Never run the fuel tank completely dry. An ir-
regu l
ar fuel supply could cause misfiring. In
this way the unburned fuel can reach the ex-
haust system, which could cause the catalytic
converter to overheat resulting in damage. Warning and control lamps
W arnin
g symbo l
s Read the additional information carefully
› ›
›
p
age 35
There are red warning symbols (priority 1)
and yellow warning symbols (priority 2).
Warning messages, Priority 1 (red)
If one of these faults occurs, the warning
lamp will light up or flash and will be accom-
panied by three audible warnings. This is a
danger warning. Stop the vehicle and switch
off the engine. Check the fault and correct it.
Obtain professional assistance if necessary.
If several priority 1 faults are detected at the
same time, the symbols will be displayed one after the other for about 2 seconds at a time
and will
continue until the fault is corrected.
No menus will be shown in the display for the
duration of a priority 1 warning message.
Examples of priority 1 warning messages
(red)
● Brake system symbol with the warning
me
ssage STOP BRAKE FLUID INSTRUC-
TION MANUAL or STOP BRAKE FAULT IN-
STRUCTION MANUAL .
● Coolant symbol with the warning me
s-
sage STOP SEE COOLANT INSTRUCTION
MANUAL .
● Engine oil pressure symbol with the
warning me
ssage STOP ENGINE OIL
PRESSURE LOW! INSTRUCTION MANUAL .
Warning messages, Priority 2 (yellow)
If one of these faults occurs, the correspond-
ing warning lamp lights up and is accompa-
nied by an audible warning. Check the corre-
sponding function as soon as possible al-
though the vehicle may be used without risk.
If several priority 2 warning messages are de-
tected at the same time, the symbols are dis-
played one after the other for about 2 sec-
onds at a time. After a set time, the informa-
tion text will disappear and the symbol will
be shown as a reminder at the side of the
display.
100
Operation
At speeds of up to approximately 80 km/h
(50 mph), it i
s ab
le to balance out differences
in the speed of the driven wheels of approxi-
mately 100 rpm/min caused by a partially
slippery road surface. It does this by braking
the wheel which has lost traction and distrib-
uting more driving force to the other driven
wheel via the differential.
To prevent the disc brake of the braking
wheel from overheating, the EDL cuts out au-
tomatically if subjected to excessive loads.
The vehicle will continue to function normally
without EDL. For this reason, the driver is not
informed that the EDL has been switched off.
The EDL will switch on again automatically
when the brake has cooled down.
Control lamp
A malfunction in the EDL is indicated by the
ABS control lamp ››› page 158. Take the
vehicle to a specialised workshop as soon as
possible. WARNING
● When accel er
ating on a slippery surface,
for example on ice and snow, press the accel-
erator carefully. Despite EDL, the driven
wheels may start to spin. This could impair
the vehicle's stability.
● Always adapt your driving style to suit road
conditions and the tr
affic situation. Do not let
the extra safety afforded by EDL tempt you in- to taking any risks when driving, this can
cause ac
c
idents. CAUTION
Modifications to the vehicle (e.g. to the en-
gine, the br ake sys
tem, running gear or any
components affecting the wheels and tyres)
could affect the efficiency of the EDL
››› page 190. Hydraulic Brake Assist (HBA)*
The function (Hydraulic Brake Assist HBA) is
on
ly
inc luded in
vehicles with ESC.
In an emergency, most drivers brake in time,
but not with maximum force. This results in
unnecessarily long braking distances.
This is when the brake assist system comes
into action. When pressing the brake pedal
rapidly, the assistant interprets it as an emer-
gency. It very quickly builds up the full brake
pressure so that the ABS can be activated
more quickly and efficiently, thus reducing
braking distance.
Do not reduce the pressure on the brake ped-
al, since the brake assist system switches off
automatically as soon as you release the
brake. Automatic hazard warning lights activation
The brake lights fl
ash automatically to indi-
cate that the vehicle is braking suddenly or in
an emergency situation. If the emergency
braking continues until the vehicle comes to
a standstill, the hazard warning lights will
then come on and the brake lights will re-
main on permanently from that moment. The
warning lights will automatically switch off
when the vehicle begins to move again or
when the "warning" light button is pressed. WARNING
● The risk of ac
cident is higher if you drive
too fast, if you do not keep your distance from
the vehicle in front, and when the road sur-
face is slippery or wet. The increased acci-
dent risk cannot be reduced by the brake as-
sist system.
● The brake assist system cannot defy the
laws
of physics. Slippery and wet roads are
dangerous even with the brake assist system!
Therefore, it is essential that you adjust your
speed to suit the road and traffic conditions.
Do not let the extra safety features tempt you
into taking any risks when driving. Anti-lock brake system (ABS)
The anti-lock brake (ABS) system prevents
the wheel
s
fr om loc
king during braking and
is an important part of the vehicle's active
safety system.
158
Operation
Catalytic converter To maintain the useful life of the catalytic
conv
er
ter
– Use only unleaded petrol with petrol en-
gines, as l
ead damages the catalytic con-
verter.
– Do not let the fuel get too low in the tank.
– For engine oil changes, do not replenish
with too much en
gine oil ››› page 206, Top-
ping up engine oil.
– Never tow the vehicle to start it, use jump
lea d
s if necessary ›››
page 52.
If you notice misfiring, uneven running or
loss of power when the vehicle is moving, re-
duce speed immediately and have the vehi-
cle inspected at the nearest specialised
workshop. In general, the exhaust warning
lamp will light up when any of the described
symptoms occur ›››
page 100. If this hap-
pens, unburnt fuel can enter the exhaust sys-
tem and escape into the environment. The
catalytic converter can also be damaged by
overheating. CAUTION
Never run the fuel tank completely dry be-
cause the irr e
gularity of the fuel supply may
cause ignition problems. This allows unburnt
fuel to enter the exhaust system, which could
cause overheating and damage the catalytic
converter. For the sake of the environment
Even when the emission control system is
workin g per
fectly, there may be a smell of
sulphur from the exhaust gas under some
conditions. This depends on the sulphur con-
tent of the fuel used. Quite often the problem
can be solved by changing to another brand
of fuel. Diesel engine particulate filter*
Fig. 173
Vehicle data sticker on back cover of
the M aint
enanc
e Programme. Your vehicle is fitted with a DPF (Diesel Partic-
u
l
at e Fi
lter) if the vehicle data sticker (back
cover of the “Maintenance Programme”) lists
the code PR 7GG ››› Fig. 173.
The diesel engine particulate filter eliminates
most of the soot from the exhaust gas sys-
tem. Under normal driving conditions, the fil-
ter cleans itself. If this is not possible (for ex- ample, multiple short trips) the filter will be
obstruct
ed by soot and the diesel engine
particulate filter warning lamp will light up.
This does not represent a fault, it is a warning
that indicates that the filter has not been
able to regenerate automatically and that you
must perform a cleaning cycle, as indicated
below.
Accumulation of soot in the diesel engine
particulate filter*
If the control lamp lights up you should
help the filter clean itself by driving in the ap-
propriate manner.
To do this, drive about 15 minutes in fourth
or fifth gear (automatic gearbox: S gear
range) at a minimum speed of 60 km/h
(37 mph), with the engine running at approxi-
mately 2,000 rpm. In this way, the soot build
up in the filter is burned. When cleaning is
successful, the control lamp turns off.
If the lamp does not turn off, or the three
lamps turn on (particulate filter , fault in
the emission control system and glow
plugs ), drive the vehicle to a specialised
workshop and have the fault repaired at the
earliest opportunity. WARNING
Always drive according to the road weather
conditions, the t err
ain and traffic. Driving rec-
ommendations should never lead to illegal
manoeuvres in surrounding traffic. 170
Checking and refilling levels
WARNING
Oil is highly inflammable! Ensure that no oil
comes int
o contact with hot engine compo-
nents when topping up. CAUTION
If the oil level is above the area A do not
star t
the engine. This could result in damage
to the engine and catalytic converter. Contact
a specialised workshop. For the sake of the environment
The oil level must never be above area A .
Otherwi se oi
l can be drawn in through the
crankcase breather and escape into the at-
mosphere via the exhaust system. Changing engine oil
Read the additional information carefully
› ›
›
p
age 41
The engine oil must be changed at the inter-
vals given in the service schedule.
We recommend that you have the engine oil
changed by a Technical Service.
The oil change intervals are shown in the
Maintenance Programme. WARNING
Only change the engine oil yourself if you
have the s pec
ialist knowledge required!
● Before opening the bonnet, read and ob-
serve the warnin
gs ››› page 201, safety notes
for work in the engine compartment .
● Wait for the engine to cool down. Hot oil
may c
ause burn injuries.
● Wear eye protection to avoid injuries, such
as acid b
urns, caused by splashes of oil.
● When removing the oil drain plug with your
fingers, k
eep your arm horizontal to help pre-
vent oil from running down your arm.
● Wash your skin thoroughly if it comes into
contact w
ith engine oil.
● Engine oil is poisonous! Used oil must be
stored in a s
afe place out of the reach of chil-
dren. CAUTION
No additives should be used with engine oil.
This c ou
ld result in engine damage. Any dam-
age caused by the use of such additives
would not be covered by the factory warranty. For the sake of the environment
● Becau se of
disposal problems and the spe-
cial tools and specialist knowledge required,
we recommend that you have the engine oil
and filter changed by a Technical Service. ●
Never pour oil do
wn drains or into the
ground.
● Use a suitable container when draining the
used oil. It
must be large enough to hold all
the engine oil. Cooling system
Contro l
lamp There is a fault if:
● The l amp does not go out again after a
f ew sec ond
s.
● The lamp lights up or flashes while the
vehicl
e is running, and three acoustic warn-
ing signals are emitted ››› .
Thi s
me an
s that either the coolant level is too
low or the coolant temperature is too high.
Coolant temperature too high
If the lamp lights up, stop the vehicle,
turn off the engine and wait for it to cool
down. Check the coolant level.
If the coolant level is correct, the overheating
may be caused by a malfunction of the radia-
tor fan. Check the radiator fan fuse and have
it replaced if necessary ››› page 81.
If the control lamp lights up again after driv-
ing on for a short distance, stop the vehicle»
207
Technical data
Advice
Operation
Emergencies
Safety
Advice
and switch the engine off. C ont
act a
Techni-
cal Service or a specialised workshop.
Coolant level too low
If the lamp lights up, stop the vehicle,
turn off the engine and wait for it to cool
down. First check the coolant level. If the lev-
el of the coolant is below the “MIN” mark,
top up with coolant liquid ››› .
WARNING
● If y our
vehicle is immobilised for technical
reasons, move it to a safe distance from traf-
fic. Turn the engine off, turn the hazard lights
on and place the warning triangle.
● Never open the bonnet if you can see or
hear ste
am or coolant escaping from the en-
gine compartment. Risk of scalding. Wait un-
til you can no longer see or hear escaping
steam or coolant.
● The engine compartment is a dangerous
area. Bef
ore carrying out any work in the en-
gine compartment, switch off the engine and
allow it to cool down. Always note the corre-
sponding warnings ››› page 201. Topping up coolant
Read the additional information carefully
› ›
›
p
age 42
Top up coolant when the level is below the
MIN (minimum) mark. Checking coolant level
– Park the vehicle in a horizontal position.
– Switch the ignition off.
– Read off the coolant level on coolant ex-
pansion t
ank. When the engine is cold, the
coolant level should be between the marks.
When the engine is hot, it may be slightly
above the upper mark.
Topping up coolant – Wait for the engine to cool down.
– Cover the coolant expansion tank cap with
a cloth and caref
ully unscrew it to the left
››› .
– Top up the coolant only if there is still cool-
ant in the e
xpan
sion tank, otherwise you
could damage the engine. If there is no
coolant in the expansion tank, do not con-
tinue driving. You should obtain professio- nal assistance ››› .
– If there is still some coolant in the expan-
sion t
ank, t op up t
o the upper mark.
– Top up with coolant until the level becomes
stabl
e.
– Screw the cap back on correctly.
Any los
s of coolant fluid normally indicates a
leak in the cooling system. Take the vehicle
straight to a specialised workshop to have
the cooling system examined. If there are no leaks in the engine cooling system, a loss of
coolant
can only occur if the coolant boils
and is forced out of the system as a result of
overheating. WARNING
● The coolin g sy
stem is under pressure. Do
not unscrew the cap on the coolant expan-
sion tank when the engine is hot: risk of
burns!
● The antifreeze and coolant fluid can be a
health haz
ard. Therefore, the antifreeze
should be stored in the original container in a
safe place out of reach of children. Failure to
comply could result in poisoning.
● If working inside the engine compartment,
remember that, even when the ignition i
s
switched off, the radiator fan may start up au-
tomatically, and therefore there is a risk of in-
jury. WARNING
If there is not enough anti-freeze in the cool-
ant sys t
em, the engine may fail leading to se-
rious damage.
● Please make sure that the percentage of
additive i
s correct with respect to the lowest
expected ambient temperature in the zone in
which the vehicle is to be used.
● When the outside temperature is very low,
the coolant
could freeze and the vehicle
would be immobilised. In this case, the heat-
ing would not work either and inadequately
dressed passengers could die of cold. 208