Page 275 of 435

274 OperationEngine compartmentChecking the engine oil level with the
control system
When checking the oil level the vehicle
must
be parked on level ground
be at normal operating temperature
have been stationary for at least five
minutes with the engine turned off
To check the engine oil level via the multi-
function display, do the following:
Turn the SmartKey in the starter switch
to position2 or press the KEYLESS-GO
start/stop button* twice.
The standard display (
page 139) should
appear in the multifunction display.
Press buttonk or j on the
steering wheel until the following mes-
sage is seen in the multifunction dis-
play:CORRECT MEASUREMENT
ONLY IF VEH. LEVEL
After about three seconds this mes-
sage is displayed:ENGINE OIL LEVEL
MEASURING NOW
!
One of the following messages will sub-
sequently appear in the indicator:
ENGINE OIL LEVEL
OK
ADD 1.0 QT. TO
REACH MAX. OIL LEVEL!(Canada:
1.0 LITER
)
ADD 1.5 QTS. TO
REACH MAX. OIL LEVEL!(Canada:
1.5 LITERS
)
A D D 2 . 0 Q T S .
TO REACH MAX. OIL LEVEL!(Canada:
2.0 LITERS
)
If necessary, add engine oil.
For adding engine oil see (
page 277).
For more information on engine oil, see
the “Technical data” section (page 391)
and (
page 393).
iIf you want to interrupt the checking
procedure, press thek or j
button on the multifunction steering
wheel.
Page 276 of 435

275 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 326).
!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 (S 430, S 500, and
S 55 AMG only) if it cannot be complet-
ed with the control system .
In this case we recommend that you
have the system checked at a
Mercedes-Benz Center.
Page 313 of 435

312 Practical hintsWhat 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 134) 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 and mes-
sages 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 150).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 318 of 435
317 Practical hints
What to do if …?
Display
Display message
Possible cause
Possible solution
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.
PRE-SAFE
INACTIVE
SEE OPER. MANUAL
!
If BAS or ESP malfunction messages are
displayed simultaneously, PRE-SAFE has
been deactivated as a result of these mal-
functions. All other occupant safety sys-
tems, such as the airbags, are still available.
Visit an authorized Mercedes-Benz Center as
soon as possible.
PRE-SAFE itself has failed. All other occu-
pant safety systems, such as the airbags,
are still available.
Visit an authorized Mercedes-Benz Center as
soon as possible.
Page 321 of 435
320 Practical hintsWhat to do if …?Display symbol
Display message
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 324 of 435

323 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 message
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 329 of 435

328 Practical hintsWhat to do if …?Display symbol
Display message
Possible cause
Possible solution
_
ENTRY POSITION
DO NOT DRIVE!
Seat, exterior mirrors and steering wheel
have not yet moved to their preset driving
positions.
Wait until the seat, exterior mirrors and
steering wheel have moved to their driv-
ing positions.
The message will disappear.
Y
HOOD OPEN!
You are driving with the hood open.
Close the hood (
page 273).
I
REMOVE KEY!
You have forgotten to remove the
SmartKey.
Remove the SmartKey from the ignition.
REPLACE KEY!
DRIVE TO WORKSHOP!
The batteries in the SmartKey are dead.
Change the batteries (
page 349).
AUTOM. LIGHT ON
REMOVE KEY!
Remove the SmartKey from the starter
switch.
F
KEY
CHECK BATTERY
!
The battery in the KEYLESS-GO* key is
discharged.
Change the battery (
page 349).
KEY
NOT RECOGNIZED!
SmartKey with KEYLESS-GO* is not rec-
ognized while the engine is running be-
cause
the SmartKey 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.
Otherwise the vehicle cannot be centrally
locked nor can the engine be started again
after it has been stopped.
Page 334 of 435

333 Practical hints
What to do if …?
Display symbol
Display message
Possible cause
Possible solution
.
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 ap-
pear if all light emitting diodes have
stopped working.
Visit an authorized Mercedes-Benz Cen-
ter as soon as possible.
TURN SIG. MIRROR, R
CHECK LAMP!
The right turn signal in the side mirror is
malfunctioning. This message will only ap-
pear if all light emitting diodes have
stopped working.
Visit an authorized Mercedes-Benz Cen-
ter as soon as possible.
<
SEAT BELT SYSTEM
VISIT WORKSHOP!
The seat belt system is malfunctioning.
Visit an authorized Mercedes-Benz
Center as soon as possible.
K
CLOSE
SUNROOF!
You have opened the driver’s door with
the SmartKey removed from the starter
switch and the sliding/pop up roof open.
Close the sliding/pop-up roof
(page 199).
J
CLOSE
SUNROOF!
You have opened the driver’s door with
the SmartKey removed from the starter
switch and the sliding/pop up roof open.
Close the sliding/pop-up roof
(page 199).