Page 680 of 801
679 Practical hints
What to do if …?
Display
Possible cause/consequence
Possible solution
Check
Coolant Level
See Oper. Manual
The coolant level is too low.
Add coolant (
page 579).
If you have to add coolant frequently, have
the cooling system checked by an authorized
Mercedes-Benz Center.
Warning!
G
Do not spill antifreeze on hot engine parts.
Antifreeze contains ethylene glycol which
may burn if it comes into contact with hot
engine parts. You could be seriously burned.
!
Do not ignore the low engine coolant level
warning. Extended driving with the message and
symbol displayed may cause serious engine
damage not covered by the Mercedes-Benz Lim-
ited Warranty.
Do not drive without a sufficient amount of cool-
ant in the cooling system. The engine will over-
heat, causing major engine damage.
Page 681 of 801
680 Practical hintsWhat 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
Possible cause/consequence
Possible solution
Coolant Low
Stop Vehicle
Turn Engine Off
The coolant is too hot.
Stop the vehicle in a safe location or as soon
as it is safe to do so and immediately turn off
the engine.
Engage the electronic parking brake
(page 422).
Only start the engine again after the message
disappears. You could otherwise damage the
engine.
Observe the coolant temperature gauge in
the instrument cluster (
page 28).
Warning!
G
Driving when your engine is overheated
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 which can occur
just by opening the engine hood. Stay
away from the engine if you see or hear
steam coming from it.
Stop the vehicle in a safe location away from
other traffic. 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). Do-
ing so may cause serious engine damage which
is not covered by the Mercedes-Benz Limited
Warranty.
Page 696 of 801
695 Practical hints
What to do if …?
When the message “Check Engine Oil Level
at Next Refueling” (all models except S 600
and S 65 AMG) or “Check Engine Oil Level
(Add 1 quart). (Canada:1Liter)” (S 600
and S 65 AMG) appears while the engine is
running and at operating temperature, the
engine oil level has dropped to approxi-
mately the minimum level.When this occurs, the warning is at first in-
termittent and then remains on if the oil
level drops further.
Visually check for oil leaks. If there are no
obvious oil leaks, drive to the nearest ser-
vice station to refill engine oil to the re-
quired level with an approved oil.For information on approved engine oils,
refer to the Factory Approved Service
Products pamphlet (USA only) or contact
an authorized Mercedes-Benz Center.Display
Possible cause/consequence
Possible solution
Check
Engine Oil Level
(Add 1 quart)
(USA only)
Check
Engine Oil Level
(Add 1 Liter)
(Canada only)
S 600 and S 65 AMG only:
The engine oil level is too low.
Check the engine oil level (
page 575) and
add engine oil as required (page 578).
If you must add engine oil frequently, have
the engine checked for possible leaks.
Check
Engine Oil Level
at Next Refueling
All models except S 600 and S 65 AMG:
The engine oil level has dropped to approx-
imately the minimum level.
Check the engine oil level (
page 575) and
add engine oil as required (page 578).
If you must add engine oil frequently, have
the engine checked for possible leaks.
!
Engine oil level warnings should not be ig-
nored. Extended driving with the symbol dis-
played could result in serious engine damage
that is not covered by the Mercedes-Benz Limit-
ed Warranty.
Page 698 of 801
697 Practical hints
What to do if …?
Display
Possible cause/consequence
Possible solution
SRS Malfunction
Service Required
There is a malfunction in the supplemental
restraint systems. The air bags or emergen-
cy tensioning devices (ETDs) could deploy
unexpectedly or fail to activate in an acci-
dent.
Drive with added caution to the nearest au-
thorized Mercedes-Benz Center.
Front Left SRS
Malfunction
Service Required
Components of the driver’s supplemental
restraint system may not work properly.
Drive with added caution to the nearest au-
thorized Mercedes-Benz Center.
Front Right SRS
Malfunction
Service Required
Components of the front passenger’s sup-
plemental restraint system may not work
properly.
Drive with added caution to the nearest au-
thorized Mercedes-Benz Center.
Rear Left SRS
Malfunction
Service Required
Components of the left rear passenger’s
supplemental restraint system may not
work properly.
Drive with added caution to the nearest au-
thorized Mercedes-Benz Center.
Warning!
G
In the event that a malfunction of the SRS is
indicated as outlined above, the SRS may
not be operational. For your safety, we
strongly recommend that you contact an
authorized Mercedes-Benz Center
immediately to have the system checked;
otherwise the SRS may not be deployed
when needed in an accident, which could re-
sult in serious or fatal injury, or it might de-
ploy unexpectedly and unnecessarily which
could result in an accident and/or injury to
you or to others.
Page 699 of 801
698 Practical hintsWhat to do if …?Display
Possible cause/consequence
Possible solution
Rear Center SRS
Malfunction
Service Required
Components of the center rear passenger’s
supplemental restraint system may not
work properly.
Drive with added caution to the nearest au-
thorized Mercedes-Benz Center.
Rear Right SRS
Malfunction
Service Required
Components of the right rear passenger’s
supplemental restraint system may not
work properly.
Drive with added caution to the nearest au-
thorized Mercedes-Benz Center.
Left Side Curtain
Airbag Malfunction
Service Required
The left side window curtain air bag may not
work properly.
Drive with added caution to the nearest au-
thorized Mercedes-Benz Center.
Right Side Curtain
Airbag Malfunction
Service Required
The right side window curtain air bag may
not work properly.
Drive with added caution to the nearest au-
thorized Mercedes-Benz Center.
Warning!
G
In the event that a malfunction of the SRS is
indicated as outlined above, the SRS may
not be operational. For your safety, we
strongly recommend that you contact an
authorized Mercedes-Benz Center
immediately to have the system checked;
otherwise the SRS may not be deployed
when needed in an accident, which could re-
sult in serious or fatal injury, or it might de-
ploy unexpectedly and unnecessarily which
could result in an accident and/or injury to
you or to others.
Page 700 of 801
699 Practical hints
What to do if …?
Display
Possible cause/consequence
Possible solution
Tele Aid
Inoperative
One or more main functions of the Tele Aid
system are malfunctioning.
Have the Tele Aid system checked by an au-
thorized Mercedes-Benz Center.
Check
Tire Pressure
The pressure is too low in one or more tires.
Carefully bring the vehicle to a halt, avoiding
abrupt steering and braking maneuvers.
Engage the electronic parking brake
(page 422).
Check and adjust tire inflation pressure as
required (
page 593).
If necessary, change the wheel (
page 723).
Tire Press. Warning
Caution
Tire Malfunction
One or more tires are deflating.
Carefully bring the vehicle to a halt, avoiding
abrupt steering and braking maneuvers.
Engage the electronic parking brake
(page 422).
If necessary, change the wheel (
page 723).
Page 701 of 801
700 Practical hintsWhat to do if …?Display
Possible cause/consequence
Possible solution
Caution
Tire Defect
One or more tires are deflating. The respec-
tive tire is shown in the multifunction dis-
play.
Carefully bring the vehicle to a halt, avoiding
abrupt steering and braking maneuvers.
Engage the electronic parking brake
(page 422).
If necessary, change the wheel (
page 723).
Warning!
G
Do not drive with a flat tire. A flat tire affects
the ability to steer or brake the vehicle. You
may lose control of the vehicle. Continued
driving with a flat tire will cause excessive
heat build-up and possibly a fire.
Follow recommended tire inflation pres-
sures.
Do not underinflate tires. Underinflated tires
wear excessively and/or unevenly, adverse-
ly affect handling and fuel economy, and are
more likely to fail from being overheated. Do
not overinflate tires. Overinflated tires can
adversely affect handling and ride comfort,
wear unevenly, increase stopping distance,
and result in sudden deflation (blowout) be-
cause they are more likely to become punc-
tured or damaged by road debris, potholes
etc.
Page 703 of 801
702 Practical hintsWhat to do if …?Display
Possible cause/consequence
Possible solution
Check Tires
The pressure is too low in one or more tires.
The respective tire is shown in the multi-
function display.
Carefully bring the vehicle to a halt, avoiding
abrupt steering and braking maneuvers.
Engage the electronic parking brake
(page 422).
Check and adjust tire inflation pressure as
required (
page 593).
If necessary, change the wheel (
page 723).
Warning!
G
Do not drive with a flat tire. A flat tire affects
the ability to steer or brake the vehicle. You
may lose control of the vehicle. Continued
driving with a flat tire will cause excessive
heat build-up and possibly a fire.
Follow recommended tire inflation pres-
sures.
Do not underinflate tires. Underinflated tires
wear excessively and/or unevenly, adverse-
ly affect handling and fuel economy, and are
more likely to fail from being overheated. Do
not overinflate tires. Overinflated tires can
adversely affect handling and ride comfort,
wear unevenly, increase stopping distance,
and result in sudden deflation (blowout) be-
cause they are more likely to become punc-
tured or damaged by road debris, potholes
etc.
