Page 264 of 418
263 Operation
Engine compartment
Other display messages
If the SmartKey or KEYLESS-GO start/stop
button* is not in position 2, the following
message will appear:FOR ENGINE OIL LEVEL
IGNITION ON!
Switch on ignition.
If you see the message:
PERF. SERV ON TIME
If engine is at normal operating
temperature, wait five minutes before
repeating check procedure.
If engine is not yet at normal operating
temperature, wait 30 minutes before
repeating check procedure.If you see the message:
ENGINE OIL LEVEL
NOT WHEN ENGINE ON!
Turn off the engine.
If the engine is at normal operating
temperature, wait five minutes before
checking oil.
If the engine is not yet at normal oper-
ating temperature, you must wait
30 minutes before checking oil.
If there is excess engine oil with the engine
at normal operating temperature, the fol-
lowing message will appear:
ENGINE OIL LEVEL
REDUCE OIL LEVEL
Have excess oil siphoned or drained
off. Contact an authorized
Mercedes-Benz Center.For more information on messages in the
display concerning engine oil, see the
“Practical hints” section (
page 310).
!Excess oil must be siphoned or drained
off. It could cause damage to the en-
gine and catalytic converter not cov-
ered by the Mercedes-Benz Limited
Warranty.iPerform the engine oil level check with
the dipstick (CL 500, and CL 55 AMG
only) if it cannot be completed with the
control system .
In this case we recommend that you
have the system checked at a
Mercedes-Benz Center.
Page 297 of 418
296 Practical hintsWhat to do if …?Problem
Possible cause
Suggested solution
The yellow fuel tank reserve
warning lamp comes on while
driving.
The fuel level has dropped below the re-
serve mark.
Refuel at the next gas station
(page 257).
<
The red seat belt telltale illumi-
nates briefly after starting the
engine.
The warning lamp reminds you to fasten
seat belts.
Fasten your seat belt.
The warning lamp goes out.
H
The yellow warning lamp for the
tire pressure monitor comes on.
The tire pressure monitor detects a loss of
pressure in at least one tire.
Bring the vehicle to a halt, avoiding
abrupt steering and braking maneuvers.
Observe the traffic situation around you.
Take note of the messages in the multi-
function display.
Warning!
G
When the tire pressure monitoring system
warning lamp is lit, one or more of your tires
is significantly under-inflated. You should
stop and check your tires as soon as possi-
ble, and inflate them to the proper pressure
as indicated on the vehicle’s tire information
placard.
Driving on a significantly under-inflated tire
causes the tire to overheat and can lead to
tire failure. Under-inflation also reduces fuel
efficiency and tire tread life, and may affect
the vehicle’s handling and stopping ability.
Each tire, including the spare, should be
checked monthly when cold and set to the
recommended inflation pressure as speci-
fied in the vehicle placard and owner’s
manual.
iThe recommended tire inflation pres-
sure for your vehicle can be found on
the inside of the fuel filler flap, not in
the owner’s manual.
Page 300 of 418
299 Practical hints
What to do if …?
Messages in the display
The control system shows warning and
malfunction messages in the multifunction
display.
Certain warning and malfunction messag-
es are accompanied by an audible signal.
Address these messages accordingly and
follow the additional instructions given in
this Operator’s Manual.
Selecting the malfunction memory menu in
the control system (
page 144) displays
both cleared and uncleared messages.
High-priority messages appear in the mul-
tifunction display in red color.
Certain messages of high priority cannot
be cleared from the multifunction display
using the reset button (page 22).
Other messages of high priority or messag-
es of less immediate priority can be
cleared from the multifunction display us-
ing the reset button (
page 22). These are
then stored in the malfunction message
memory (
page 144).On the pages that follow, you will find a
compilation of the most important warning
and malfunction messages that may ap-
pear in the display. High priority messages
appear on a red background.
Warning!
G
All categories of messages contain impor-
tant information which should be taken note
of and, where a malfunction is indicated, ad-
dressed as soon as possible at an autho-
rized Mercedes-Benz Center.
Failure to repair condition noted may cause
damage not covered by the Mercedes-Benz
Limited Warranty, or result in property dam-
age or personal injury.Warning!
G
No messages will be displayed if either the
instrument cluster or the multifunction dis-
play is inoperative.
Contact your nearest authorized
Mercedes-Benz Center.
iTurning the SmartKey in the starter
switch to position2, or pressing the
KEYLESS-GO* start/stop button twice
causes all lamps as well as the multi-
function display to come on. Make sure
that they are all in working order before
starting your journey.
Page 303 of 418
302 Practical hintsWhat to do if …?Display
Display message
Possible cause
Possible solution
DISTRONIC
EXTERNAL INTERFER-
ENCE
REACTIVATE!
Distronic* is switched off and is temporarily
unavailable.
Try activating Distronic* again later.
CURRENTLY UNAVAIL-
ABLE
SEE OPER. MANUAL
Distronic* is switched off because the Dis-
tronic* cover in the radiator grille is dirty.
Clean the Distronic* cover in the radiator
grille (
page 287).
Restart the vehicle.
DRIVE TO WORKSHOP!
Distronic* is malfunctioning or the display
is malfunctioning.
Visit an authorized Mercedes-Benz Center as
soon as possible.
P
SHIFT
TO P
You have tried to turn off the engine with
the KEYLESS-GO* start/stop button with
the gear selector lever not inP.
Place the gear selector lever in positionP.
ESP
MALFUNCTION!
VISIT WORKSHOP!
The ESP has detected a malfunction and
switched off.
The ABS may still be operational.
Continue driving with added caution.
Have the system checked at an authorized
Mercedes-Benz Center as soon as possible.
Failure to follow these instructions increases the
risk of an accident.
DISPLAY MALFUNCTION
VISIT WORKSHOP!
The ESP or the ESP display is malfunction-
ing.
Continue driving with added caution.
Have the system checked at an authorized
Mercedes-Benz Center as soon as possible.
Failure to follow these instructions increases the
risk of an accident.
Page 305 of 418
304 Practical hintsWhat to do if …?Symbol messagesDisplay symbol
Display messages
Possible cause
Possible solution
#
BATTERY/ALTERNATOR
VISIT WORKSHOP!
The battery was charged with a battery
charger or jump started.
Have the battery checked at a service
station.
The battery is no longer charging.
Possible causes:
alternator malfunctioning
broken poly-V-belt
Stop immediately and check the
poly-V-belt.
If it is broken:
Do not continue to drive. Otherwise the
engine will overheat due to an inoperative
water pump which may result in damage
to the engine. Notify an authorized
Mercedes-Benz Center.
If it is intact:
Drive immediately to the nearest autho-
rized Mercedes-Benz Center. Adjust driv-
ing to be consistent with reduced braking
responsiveness.
Page 308 of 418
307 Practical hints
What to do if …?
During severe operating conditions,
e.g. stop-and-go traffic, the coolant tem-
perature may rise close to 248°F (120°C).
Display symbol
Display messages
Possible cause
Possible solution
Ï
COOLANT
STOP, ENGINE OFF!
The coolant is too hot.
Stop the vehicle and turn off the engine.
Only start the engine again after the mes-
sage disappears. You could otherwise
damage the engine.
Warning!
G
Driving when your engine is badly overheat-
ed can cause some fluids which may have
leaked into the engine compartment to
catch fire. You could be seriously burned.
Steam from an overheated engine can cause
serious burns and can occur just by opening
the engine hood. Stay away from the engine
if you see or hear steam coming from it.
Turn off the engine, get out of the vehicle
and do not stand near the vehicle until the
engine has cooled down.
!The engine should not be operated with
the coolant temperature above 248°F
(120°C). Doing so may cause serious
engine damage which is not covered by
the Mercedes-Benz Limited Warranty.
Page 314 of 418
313 Practical hints
What to do if …?
Display symbol
Display messages
Possible cause
Possible solution
F
KEY
CHECK BATTERY
The battery in the KEYLESS-GO* key is
discharged.
Change the battery (
page 332).
KEY
NOT RECOGNIZED!
SmartKey with KEYLESS-GO* is not rec-
ognized while the engine is running be-
cause
the SmartKey with KEYLESS-GO* is
not in the vehicle
there is strong radio-frequency inter-
ference
Stop the vehicle as soon as it is safe to do
so.
Search for the SmartKey with
KEYLESS-GO*.
Otherwise the vehicle cannot be centrally
locked nor can the engine be started again
after it has been stopped.
SmartKey with KEYLESS-GO* is momen-
tarily not recognized.
Change the position of the SmartKey with
KEYLESS-GO* in the vehicle.
Operate the vehicle with the SmartKey in
the starter switch if necessary.
KEY
DETECTED IN VEHICLE
SmartKey with KEYLESS-GO*left in the
vehicle was recognized while locking the
vehicle from the outside.
Take the SmartKey with KEYLESS-GO*
out of the vehicle.
KEY
DRIVE TO WORKSHOP!
The KEYLESS-GO* system is malfunction-
ing.
Visit an authorized Mercedes-Benz Cen-
ter as soon as possible.
Page 318 of 418
317 Practical hints
What to do if …?
Display symbol
Display messages
Possible cause
Possible solution
.
SWITCH OFF LIGHTS!
Lamps have been turned on although the
SmartKey in the starter switch is in
position0.
Turn off the headlamps.
TURN SIGNAL F, L
CHECK LAMP!
SUBSTITUTE LAMP ON!
The left front turn signal lamp is malfunc-
tioning. A back-up bulb is being used.
Replace the bulb as soon as possible.
TURN SIGNAL F, R
CHECK LAMP!
SUBSTITUTE LAMP ON!
The right front turn signal lamp is mal-
functioning. A back-up bulb is being used.
Replace the bulb as soon as possible.
TURN SIGNAL, L
CHECK LAMP!
SUBSTITUTE LAMP ON!
The left rear turn signal lamp is malfunc-
tioning. A back-up bulb is being used.
Replace the bulb as soon as possible.
TURN SIGNAL, R
CHECK LAMP!
SUBSTITUTE LAMP ON!
The right rear turn signal lamp is malfunc-
tioning. A back-up bulb is being used.
Replace the bulb as soon as possible.
TURN SIG. MIRROR, L
CHECK LAMP!
The left turn signal in the side mirror is
malfunctioning. This message will only
appear if all light emitting diodes have
stopped working.
Visit an authorized Mercedes-Benz Cen-
ter as soon as possible.
