Engine
Problem
Possible causes/consequences and
X XSolutions The engine will not
start. You can hear the
starter motor operat-
ing. R
There is a malfunction in the engine electronics.
R There is a malfunction in the fuel supply.
R The on-board voltage is too low because the starter battery is
too weak or discharged.
X Before the next start attempt, turn the key back to position 0
(Y page 182) in the ignition lock or press the Start/Stop but-
ton* until all the indicator lights in the instrument cluster have
gone out.
X Try to start the engine again (Y page 202). When doing so,
remember that excessively long and frequent attempts to start
the engine will drain the battery.
If the engine does not start after several attempts:
X Consult a qualified specialist workshop. The engine will not
start. You cannot hear
the starter motor. The on-board voltage is too low because the starter battery is too
weak or discharged.
X
Jump-start the vehicle (Y page 384).
If the engine does not start despite attempting to jump-start it:
X Consult a qualified specialist workshop. The starter motor was exposed to a thermal load that was too high.
X
Allow the starter motor to cool down for approximately two
minutes.
X Try to start the engine again.
If the engine still does not start:
X Consult a qualified specialist workshop. The engine is not run-
ning smoothly and is
misfiring. There is a malfunction in the engine electronics or a mechanical
component of the engine control unit.
X
Only depress the accelerator pedal slightly.
X Have the cause rectified immediately at a qualified specialist
workshop.
Otherwise, non-combusted fuel may get into the catalytic con-
verter and damage it. 358
TroubleshootingPractical advice
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PARKTRONIC
Problem
Possible causes/consequences and
X XSolutions Only the red segments
in the PARKTRONIC
warning display are lit.
You also hear a warning
tone for approximately
two seconds.
PARKTRONIC is deacti-
vated after approx-
imately 20 seconds and
the indicator lamp in
the PARKTRONIC but-
ton lights up. PARKTRONIC has malfunctioned and has switched itself off.
X
If problems persist, have PARKTRONIC checked at a qualified
specialist workshop. Only the red segments
in the PARKTRONIC
warning display are lit.
PARKTRONIC is deacti-
vated after approx-
imately 20 seconds. The PARKTRONIC sensors are dirty or there is interference.
X
Clean the PARKTRONIC sensors (Y page 310).
X Switch the ignition back on. Only the red segments
in the PARKTRONIC
warning display are lit.
PARKTRONIC is deacti-
vated after approx-
imately 20 seconds. The problem may be caused by an external source of radio or
ultrasound waves.
X
See if PARKTRONIC functions in a different location. Headlamps
Problem
Possible causes/consequences and
X XSolutions The headlamps are mis-
ted up on the inside. Air humidity is very high.
X
Drive with the headlamps switched on.
The headlamps are demisted after a short distance. The headlamp housing is not sealed and moisture has been able
to enter.
X
Have the headlamps checked at a qualified specialist workshop. 360
TroubleshootingPractical advice
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X
Insert the emergency key element fully into
tailgate lock :.
X Turn the emergency key element anti-
clockwise as far as possible.
The boot is unlocked.
X Turn the emergency key element back and
remove it. Replacing batteries (key, remote con-
trol, etc.) Notes
It is advisable to have the batteries replaced
at a qualified specialist workshop, e.g. at a
Mercedes-Benz Service Centre. G
Risk of poisoning
Batteries contain toxic and caustic substan-
ces. For this reason, keep batteries away from
children.
If a battery is swallowed, consult a doctor
immediately. H
Environmental note
Do not dispose of batteries with the house-
hold rubbish. They contain highly toxic sub-
stances.
Take discharged batteries to a qualified spe-
cialist workshop, e.g. a Mercedes-Benz
Service Centre, or to a special collection point
for old batteries. Key
Checking the batteries X
Press the &or% button.
The batteries are in order if the battery
charge indicator lamp lights up briefly.
Changing batteries (key with KEYLESS
GO*) You require two CR 2025 3 V cell batteries.
X
Remove the emergency key element from
the key (Y page 365). X
Insert emergency key element :into the
opening in the key and push in the direction
of the arrow.
Battery tray ;is released.
X Pull battery tray ;out of the key. X
Remove old batteries :from the battery
tray.
X Insert the new batteries beneath the con-
tact spring with the positive pole facing
upwards. Use a lint-free cloth to do so. Replacing batteries (key, remote control, etc.)
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Changing bulbs
Main-beam headlamp/motorway spot
lamp X
Switch off the lights.
X Open the bonnet.
X Pull housing cover :by retaining lug ;in
the direction of the arrow and remove it.
X Left-hand headlamp: pull fitting aid =
upwards and remove bulb ?from the
headlamp with the fitting aid =.
X Right-hand headlamp: pull fitting aid =
down and remove bulb ?from the head-
lamp with fitting aid =.
X Remove bulb ?from the bulb holder.
X Insert the new bulb so that it fits flush.
X Left-hand headlamp: insert fitting aid =
into the headlamp.
The handle of fitting aid =must be point-
ing upwards. X
Right-hand headlamp: insert fitting aid =
into the headlamp.
The handle of fitting aid =must be point-
ing downwards.
X Left-hand headlamp: pull fitting aid =
down until it engages.
X Right-hand headlamp: pull fitting aid =up
until it engages.
X Replace housing cover :and tighten it
until it engages audibly.
Infrared light* (Night View Assist*) X
Switch off the lights.
X Open the bonnet.
X Pull housing cover :by retaining lug ;in
the direction of the arrow and remove it.
X Turn bulb holder =anti-clockwise and
remove it.
X Push the two detents on the right and left
of bulb holder =and remove the bulb from
bulb holder =.
X Insert the new bulb into bulb holder =.
X Insert bulb holder =into the guide in the
headlamp.
Cable outlet ?must be pointing down and
to the right.
X Turn bulb holder =clockwise.
Cable outlet ?must be pointing down and
to the left.
X Replace housing cover :and tighten it
until it engages audibly. Changing bulbs
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Cornering light
X
Switch off the lights.
X Open the bonnet.
X Pull housing cover :by retaining lug ;in
the direction of the arrow and remove it.
X Turn bulb holder ?anti-clockwise and
remove it.
X Remove the bulb from bulb holder ?.
X Insert the new bulb into bulb holder ?and
push it down as far as it will go.
X Insert bulb holder ?into the guide in the
headlamp.
Left-hand headlamp: cable outlet =of
bulb holder ?must be pointing down and
to the left.
Right-hand headlamp: cable outlet =of
bulb holder ?must be pointing up and to
the right.
X Turn bulb holder ?clockwise.
X Replace housing cover :and tighten it
until it engages audibly. Replacing the wiper blades
G
Risk of accident
The windscreen will no longer be wiped prop-
erly if the wiper blades are worn. This could
prevent you from observing the traffic condi-
tions, thereby causing an accident. Replace
the wiper blades twice a year, ideally in spring
and autumn. G
Risk of accident
The wiper arms could start moving and cause
an injury if you leave the windscreen wipers
switched on.
Remove the key from the ignition lock before
replacing the wiper blades.
! To avoid damaging the windscreen wiper
blades, make sure that you touch only the
wiper arm of the windscreen wiper. Removing
Moving the wiper blades to a vertical
position Vehicles without KEYLESS GO*
X
Turn the key to position 1or 2in the ignition
lock.
X Set the windscreen wipers to posi-
tion ° on the combination switch.
X When the wiper arms have reached a ver-
tical position, turn the key to position 0and
remove it from the ignition lock.
X Fold the wiper arm away from the wind-
screen until it engages.
X Set the wiper blade at right angles to the
wiper arm.
Vehicles with KEYLESS GO*
X Switch off the engine.
X Take your foot off the brake pedal.
X Set the windscreen wipers to posi-
tion ° on the combination switch.
X Press the Start/Stop button repeatedly
until the windscreen wipers start.
X When the wiper arms have reached a ver-
tical position: press the Start/Stop button.
X Fold the wiper arm away from the wind-
screen until it engages.
X Set the wiper blade at right angles to the
wiper arm. 372
Replacing the wiper bladesPractical advice
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