lights MERCEDES-BENZ E-CLASS CABRIOLET 2010 Repair Manual

Problem Possible causes/consequences and
M Solutions
8
The yellow reserve fuel
warnin
glamp lights up
while the engine is run-
ning. The fuel level has fallen below the reserve range.
The fuel tank must be filled at least to the reserve fuel level to
prevent impairment to the running of the engine.
X Refuel at the nearest filling station. ?
The red coolant warn-
ing lamp lights up while
the engine is running
and the coolant tem-
perature gauge is at the
start of the scale.
The temperature senso
rfor the coolant temperatur egauge is
faulty.
The coolant temperature is no longer being monitored. There is a
risk of engine damage if the coolant temperature is too high.
X Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions. Do not continue
driving under any circumstances.
X Engage the parking brake.
X Consult aqualified specialist workshop. ?
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 radiator may be
blocked or the electric radiator fan may be malfunctioning.
The coolant is too hot and the engine is no longer being cooled
sufficiently.
X Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
X Allow the engine and coolant to cool.
X Check the coolant level and top up the coolant (Y page 261).
Observe the warning notes.
X If the coolant needs topping up more often than usual, have the
engine coolant system checked.
X Make sure that the air suppl ytot he radiator is not blocked, e.g.
by snow, slush or ice.
X If the coolant temperature is less than 12 0†,you can con tinue
driving to the neares tqualified specialist workshop.
X Avoid subjecting the engine to heavy loads ,e.g. driving in moun-
tainous terrain, and stop-s tart driving. ?
Th
er ed coolan twarn-
ing lamp comes on
while the engine is run-
ning. Awarning tone
also sounds. The coolant temperature has exceeded 120 †. The airflow to the
radiator may be blocked or the coolant level may be too low.
The engine is not being cooled sufficiently and may be damaged.
X Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
X Allow the engine and coolant to cool. Warnin
gand indicator lam psin th einstru ment cluster
241On-board computer and displays
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Drivin
gsystems Problem Possible causes/consequences and
M Solutions
·
Th
er ed distanc ewarn-
in gl amp lights up while
th ev ehicle is in motion. G
Risk of acc
ident
The distanc etothe vehicle in frontistoo smal lfor the speed
selected.
X Increase the distance. ·
The red distance warn-
ing lam
plights up while
the vehicle is in motion.
Aw arning ton ealso
sounds. G
Ris
kofa ccident
Aw arning is issued if:
R you are approaching avehicle in fron tattoo grea taspeed
R DIST RONIC PLUS or PRE-SAFE ®
Brake has detected astationary
obstacle in your line of travel
X Be prepared to brake immediately.
X Pay careful attention to the traffic situation. You may have to
brake or take evasive action. 242
Warning and indicator lamps in the instrument clusterOn-board computer and displays
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thi
sreason, following acar wash, drive with
particular care unti lthe brakes are dry. G
Risk of accident
Th ev ehicle is braked when th eHOLDfunction
or DISTRONI CPLUSisa ctivated. Therefore,
dea ctivate th eHOLD function and DISTRONIC
PLU Sbefor ethe vehicle is washed in an auto-
matic car wash.
You can wash the vehicle in an automatic car
wash from the ver ystart.
! We recommend automatic car washes
with an adjustable 40
high-pressure pre-
cleaning program. In car washes that use
hig hw ater pressures, there is adanger that
as mall quantity of water may leak int othe
vehicle.
! Cabriolet: do not treat the vehicle with
hot wax under any circumstan ces.
! Cabriolet: pull the key out of the ignition
lock when washing the vehicle .This
ensures that the win ddeflector on the
windscreen is retracted. The wind deflector
may otherwise be damaged.
If the vehicle is ver ydirty, pre-wash it before
cleaning it in an automatic car wash.
! In car washes with atowing mechanism,
make sure that the automatic transmission
is in transmission position N,otherwis ethe
vehicle could be damaged.
! Make sur ethat the side windows ar ecom-
pletel yclosed, that the ventilation/heater
blowe risfully turned off and that the wind-
screen wiper switch is set to 0.Otherwi se,
the rain/light senso rmay be activated, trig-
gering unintended wiper movemen ts.T his
could cau se damage to the vehicle.
After using an automatic car wash, wip eoff
wax from th ewindscreen and the wiper
blades. This will prevent smears and reduce
wiping noises caused by residue on the wind-
screen. High-pressur
ecleaners G
Risk of accident
Do not use high-pressur ecleaners with circu-
lar-jet nozzles (dirt grinders) to clean your
vehicle, in particular the tyres. You could oth-
erwise damage the tyres and cause an acci-
dent.
! Always maintain adistance of at least
30 cm between the vehicle and the high-
pressure cleaner nozzle. Information about
the correct distance is available from the
equipment manufacturer.
Move the high-pressure cleaner nozzle
around when cleaning your vehicle.
Do not aim directly at any of the following:
R tyres
R door joint
R soft top (Cabriolet)
R wind deflector net (Cabriolet)
R electrical components
R battery
R connectors
R lights
R seals
R trim elements
R ventilation slots
Damaged seals or electrical components
can lead to leaks or failures.
Cleanin gthe whee ls !
Do not use acidic whee lcleaning products
to remov ebrake dust .This could damage
wheel bolts and brake componen ts.
! Do not park up the vehicle for an extended
perio dstraight after cleaning it, particularly
after having cleaned the wheels with wheel
cleaner. Wheel cleaners could cause
increased corrosio nofthe brake discs and
brake pads/linings. For this reason, you
should drive for afew minutes after clean-
ing. Brakin gheats the brak ediscs and
40 In accordance with the specification sfor Cabriolet programs. 264
CareMaintenance and care
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