Heat MERCEDES-BENZ S550 2007 W221 Workshop Manual

568 Practical hintsWhat to do if …?Display
Possible cause/consequence
Possible solution
Tire pressure
Check tires
The pressure has fallen significantly in one
or more tires.

Carefully bring the vehicle to a halt, avoiding abrupt steering
and braking maneuvers. Observe the traffic situation around
you.

Check and adjust tire inflation pressure as required
(page 511).

If necessary, change the wheel (
page 629).

Restart the Run Flat Indicator* after adjusting the tire infla-
tion pressure values (
page 516).
Tire pressure monitor
inoperative
The Advanced TPMS* or a wheel sensor is
malfunctioning.

Have the Advanced TPMS* checked by an authorized
Mercedes-Benz Center.
Tire pressure monitor
inoperative
No wheel sensors
The Advanced TPMS* is deactivated be-
cause wheels without proper sensors were
installed.

Have the wheel sensors installed by an authorized
Mercedes-Benz Center.
As soon as all wheels with sensors have been mounted, the
Advanced TPMS* is switched back on after driving for sever-
al minutes.
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.

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)

580 Practical hintsWhat to do if …?Display
Possible cause/consequence
Possible solution
Parking brake
See Oper. Manual
If overheated:
Let vehicle cool down, and do not engage
electric parking brake during this time.
or

Switch ignition off and back on again, and en-
gage or release electric parking brake.
(USA only)(Canada only)
Parking brake
inoperative
When you engage or release the electric
parking brake, the red indicator lamp for
the electric parking brake flashes and goes
out after approx. 10 seconds. The yellow
warning lamp for the electric parking brake
lights up.
The electric parking brake is malfunction-
ing.

Switch ignition off and back on again, and en-
gage electric parking brake (
page 364).
If the electric parking brake cannot be engaged:

Shift the automatic transmission to P
(page 367).

Protect vehicle from rolling away while
parked by using a chock from the vehicle tool
kit (
page 613).

Visit an authorized Mercedes-Benz Center as
soon as possible.

584 Practical hintsWhat to do if …?Display
Possible cause/consequence
Possible solution
Currently unavailable
See Oper. Manual
ESP
® and PRE-SAFE
® are temporarily un-
available. It is possible that the self-diag-
nostics have not yet completed.
In addition, the yellow ESP
® warning
lampv comes on.
The brake system functions normally.

Synchronize the ESP
®:
Drive a short distance with gentle turns at a
speed above 12 mph (20 km/h).
The message disappears when ESP
® is again
available.
Currently unavailable
See Oper. Manual
ESP
® and PRE-SAFE
® are switched off due
to undervoltage. It is possible that the bat-
tery is not charged.
The brake system functions normally.

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.
Currently unavailable
See Oper. Manual
If the yellow ESP
® warning lampv flash-
es while driving and this message appears,
the ETS has switched off to prevent over-
heating of the drive wheel brakes.
As soon as the brakes have cooled off, the ETS
switches on again.
The message in the multifunction display disap-
pears and the ESP
® warning lampv goes
out.

586 Practical hintsWhat to do if …?Display
Possible cause/consequence
Possible solution
Vehicle rising
Please wait a moment
The vehicle level is too low while at a stand-
still. The vehicle will be raised.

Do not drive off.

Wait until the message disappears from the
multifunction display.
You may then drive off.
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 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:

Drive immediately to the nearest authorized
Mercedes-Benz Center.

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.

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.

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)

607 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.
Tire pressure
Caution, tire defect
Vehicles with Advanced TPMS*:
One or more tires are deflating.

Carefully bring the vehicle to a halt, avoiding
abrupt steering and braking maneuvers.

If necessary, change the wheel (
page 629).
Caution
Tire defect
Vehicles with Advanced TPMS*:
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.

If necessary, change the wheel (
page 629).
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.

608 Practical hintsWhat to do if …?Display
Possible cause/consequence
Possible solution
Tire pressure
Check tires
Vehicles with Advanced TPMS*:
The pressure is too low in one or more tires.

Carefully bring the vehicle to a halt, avoiding
abrupt steering and braking maneuvers.

Check and adjust tire inflation pressure as
required (
page 514).

If necessary, change the wheel (
page 514).
Check tires
Vehicles with Advanced TPMS*:
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.

Check and adjust tire inflation pressure as
required (
page 514).

If necessary, change the wheel (
page 514).
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.