Page 568 of 705
567 Practical hints
What to do if …?
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Possible cause/consequence
Possible solution
Park Assist
inoperative
Park Assist* is unavailable due to a mal-
function.
Visit an authorized Mercedes-Benz Center as soon as possible.
PRE-SAFE
inoperative
See Owner's Manual
PRE-SAFE
® itself has failed. All other occu-
pant safety systems, such as the air bags,
are still available.
Visit an authorized Mercedes-Benz Center as soon as possible.
Check tires
then restart
Run Flat Indicator
There was a warning message about a loss
in tire inflation pressure and the Run Flat In-
dicator* has not been restarted yet.
Check and adjust tire inflation pressure as required
(page 514).
Then restart the Run Flat Indicator* (
page 515).
Radar sensor
deactivated
See Oper. Manual
You attempt to activate DISTRONIC Plus*
or Park Assist* even though you have
switched off the radar sensors* on the vehi-
cle.
Check if the radar sensors* may be switched on (
page 256).
Switch on the radar sensors* using the instrument cluster
control system.
Run Flat Indicator
inoperative
The Run Flat Indicator* is malfunctioning.
Visit an authorized Mercedes-Benz Center as soon as possible.
Service X
due
Service X must be carried out (
page 532).
Have the maintenance service carried out by an authorized
Mercedes-Benz Center.
Service X exceeded
by X days
by XXX mls (km)
Service X must be carried within the next ...
or before you have driven ... miles (kilome-
ters) (
page 532).
Have the maintenance service carried out by an authorized
Mercedes-Benz Center as soon as possible.
Shift to P or N
to start engine
You have attempted to start the engine
while the automatic transmission was set to
position R or D.
Shift the automatic transmission to P or N (
page 367).
Page 574 of 705
573 Practical hints
What to do if …?
Display
Possible cause/consequence
Possible solution
Check brake
fluid level
There is insufficient brake fluid in the reser-
voir.
Risk of accident! Stop the vehicle in a safe lo-
cation as soon as it is safe to do so and notify
an authorized Mercedes-Benz Center. Do not
add brake fluid! This will not solve the prob-
lem.
(USA only)(Canada only)Warning!
G
Driving with the message “Check brake fluid
level ” displayed can result in an accident.
Have your brake system checked immedi-
ately. Do not add brake fluid before check-
ing the brake system. Overfilling the brake
fluid reservoir can result in spilling brake flu-
id on hot engine parts and the brake fluid
catching fire. You can be seriously burned.
!
If you find that the brake fluid in the brake
fluid reservoir has fallen to the minimum mark or
below, have the brake system checked for brake
pad thickness and leaks.
Page 580 of 705
579 Practical hints
What to do if …?
Display
Possible cause/consequence
Possible solution
Parking brake
See Oper. Manual
When you engage or release the electric
parking brake, the red indicator lamp for
the electric parking brake flashes for
approx.10 seconds. Afterward, it goes out
or lights up continuously. The yellow warn-
ing lamp for the electric parking brake lights
up.
The electric parking brake is malfunctioning
or overheated for example due to over- or
undervoltage.
Carefully drive off (
page 364).
Visit an authorized Mercedes-Benz Center as
soon as possible.
In the event of overvoltage or undervoltage:
Remove the cause of the overvoltage or und-
ervoltage, e.g. charge the battery or restart
the engine.
Switch ignition off and back on again, and en-
gage or release electric parking brake
(page 364).
If the electric parking brake still cannot be re-
leased:
Release electric parking brake mechanically
(page 616).
Visit an authorized Mercedes-Benz Center as
soon as possible.
(Continued on next page)
(USA only)(Canada only)
Page 584 of 705
583 Practical hints
What to do if …?
Display
Possible cause/consequence
Possible solution
Inoperative
See Oper. Manual
S 600 only:
ESP
® a s w e l l a s P R E - S A F E
® are switched off
due to a malfunction. In addition, the v
and ; (USA only) or 3(Canada only)
warning lamps come on in the instrument
cluster.
Brake force assistance is impaired and is
sustained through an electric substitute
function as long as the engine is running.
The brake system continues to function
normally. You will feel a pulsating effect at
the brake pedal while braking.
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 588 of 705
587 Practical hints
What to do if …?
Display
Possible cause/consequence
Possible solution
Coolant,
please refill
See Oper. Manual
The coolant level is too low.
Add coolant (
page 497).
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 can 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 589 of 705
588 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 level
Stop vehicle!
Switch engine off
The coolant is too hot.
Stop the vehicle in a safe location or as soon
as it is saf e to do so and imm ediat ely turn of f
the engine.
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 590 of 705
589 Practical hints
What to do if …?
Display
Possible cause/consequence
Possible solution
Coolant level
Stop vehicle!
Switch engine off
The poly-V-belt could be broken.
Stop the vehicle in a safe location or as soon
as it is safe to do so and immediately turn off
the engine.
Check the poly-V-belt.
If it is broken:
Do not continue to drive. Otherwise the en-
gine will overheat due to an inoperative water
pump which may result in damage to the en-
gine. Notify an authorized Mercedes-Benz
Center.
If it is intact:
Do not continue to drive the vehicle with this
message displayed. Doing so could result in
serious engine damage that is not covered by
the Mercedes-Benz Limited Warranty.
Observe the coolant temperature gauge in
the instrument cluster (
page 28).
(Continued on next page)
Page 591 of 705
590 Practical hintsWhat to do if …?Display
Possible cause/consequence
Possible solution
Coolant level
Stop vehicle!
Switch engine off
Restart the engine.
If this message disappears from the multi-
function display:
Drive immediately to the nearest autho-
rized Mercedes-Benz Center.
If this message does not disappear from the
multifunction display:
Call Roadside Assistance.
The cooling fan for the coolant is malfunc-
tioning.
Observe the coolant temperature gauge in
the instrument cluster (
page 28).
Have the fan replaced as soon as possible.
You are driving with one or more doors
open.
The display symbol shows you which doors
are open.
Close the doors.
