2009 MERCEDES-BENZ E-CLASS COUPE check engine light

Problem Possible causes/consequences and
0050
0050Solutions Vehicles with
apetrol
engine:
The engine is not run-
ning smoothly and is
misfiring. There is
amalfunction in the engine electronics or amechanical
componentoft he engine control unit.
X Only depress the accelerator pedal slightly.
X Have the cause rectified immediately at aqualified specialist
workshop.
Otherwise, non-combusted fuel may get into the catalytic con-
verter and damage it. The coolant tempera-
ture gauge shows a
value above 120 †.
The coolant warning
lamp may also light up
and awarning tone may
sound (Y page 107). The coolant level is too low. The coolant is too hot and the engine
is no longer being cooled sufficiently.
X
Stop as soon as possible and allow the engine and the coolant
to cool down.
X Check the coolant level (Y page 183). Observe the warning
notes as you do so and top up the coolant if necessary. If the coolant level is correct,t
he radiator fan may be faulty. The
coolant is too hot and the engine is no longer being cooled suffi-
ciently.
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 driving. 242
TroubleshootingPractical advice
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Problem Possible causes/consequences and
0050
0050Solutions You can no longer lock
or unlock the vehicle
using KEYLESS GO*.
KEYLESS GO* is in standby mode because the vehicle has not
been unlocked for an extended period.
X
Pull the door handle and then turn the key to position 2in the
ignition lock. KEYLESS-GO* is malfunctioning.
X
Lock/unlock the vehicle using the remote control function of
the key. Point the tip of the key at the driver's door handle from
close range and press the 0036/0037button.
X Have the key checked at aqualified specialist workshop. There is interference from
apowerful source of radio waves.
X Lock/unlock the vehicle as described in the "Opening and clos-
ing in an emergency" section (Y page 249).You have lost
akey. X
Have the key cancelled at aMercedes-Benz Service Centre.
X Report the loss immediately to the vehicle insurers.
X If necessary, have the manual locks changed too. You have lost the emer-
gency key element.
X
Report the loss immediately to the vehicle insurers.
X If necessary, have the manual locks changed too. The key cannot be
turned in the ignition
lock. The key has been in position
0for aconsiderable time.
X Remove the key and reinsert it into the ignition lock.
X Check the starter battery and charge it if necessary
(Y page 273).
X Start the engine. The on-board voltage is too low.
X
Switch off non-essential consumers, e.g. seat heating* or inte-
rior lighting, and try to turn the key again.
If this does not work:
X Check the starter battery and charge it if necessary
(Y page 273).
or
X Jump-start the vehicle (Y page 276).
or
X Consult aqualified specialist workshop. 248
TroubleshootingPractical advice
*o
ptional
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compartment under the luggage compart-
ment floor. Before changing
afuse
X Park the vehicle.
X Switch off al lelectrical consumers.
X Remove the key from the ignition lock. Fus
eboxunde rthe dashboard X
To open: openthe driver' sdoor.
X Pull ou tcover 0046slightl yatthe bottom
008A.
X Pull cover 0046outwards and remove it 0047.
X To close: clipinc over0046at the front.
X Fol dc over 0046inward suntilite ngages.
X Close the driver' sdoor. Fus
eboxin the engine compartment
X Make sure that the windscreen wiper sare
turne doff. G
Risk of injury
Make sure that the windscreen wiper sare
turne doff and the key is pulled ou tofthe igni-
tion lock before yo uopenthe cove rofthe fuse
box. Otherwise, the windscreen wiper sand
the wiper rod sabove the cove rcould be set
in motion. Thi scould lead to yo uorothers
being injured by the wiper rods. X
To open: openthe bonne t(Ypage 180). X
Remove moistur efrom the fus ebox using
ad ry cloth.
X Uncli plines 0047 from the lid.
X Move asid elines 0047.R oute the lines behind
connection 008Ato do this.
X Ope nclamps 0046and unhook the corre-
sponding wire straps at the bottom.
X Lift off the fus ebox cove rtowards the front
of the vehicle.
X To close: check whethe rthe rubber sea lis
positioned correctly in the lid.
X Inser tthe li dinto the bracket at the rea rof
the fus ebox.
X Press the li ddowna nd secure with
clamps 0046.
X Clip lines 0047onto the lid.
X Close the bonne t(Ypage 180). Fus
eboxin the boot
X To open: openthe boot. Fuses
281Practical advice
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