Page 339 of 456
338 Practical hintsWhat to do if …?
On the pages that follow, you will find a
compilation of the most important warning
and malfunction messages that may ap-
pear in the malfunction display.
For your convenience the messages are di-
vided into two sections:
Text messages (
page 339)
Symbol messages (
page 345)
iSwitching on the ignition causes all in-
strument cluster lamps (except high
beam headlamp indicator lamp and
turn signal indicator lamps unless acti-
vated) as well as the multifunction dis-
play to come on. Make sure the lamps
and multifunction display are in work-
ing order before starting your journey.
Page 347 of 456

346 Practical hintsWhat to do if …?Display
Possible cause/consequence
Possible solution
2
BRAKE PAD WEAR
VISIT WORKSHOP
The brake pads have reached their wear
limit.
Have the brake pads replaced as soon as
possible.
;(USA only)3(Canada only)
BRAKE FLUID
VISIT WORKSHOP
There is insufficient brake fluid in the res-
ervoir.
Risk of accident! Stop the vehicle in a
safe location and notify an authorized
Mercedes-Benz Center. Do not add brake
fluid! This will not solve the problem.
Failure to follow these instructions increases
the risk of accident.
Warning!
G
Driving with the message
BRAKE FLUID
VISIT WORKSHOP
displayed can result in an
accident. Have your brake system checked
immediately. Do not add brake fluid before
checking the brake system. Overfilling the
brake fluid reservoir can result in spilling
brake fluid on hot engine parts and the
brake fluid catching fire. You can be serious-
ly 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.
!Brake pad thickness must be visually
checked by a qualified technician at the
intervals specified in the Maintenance
Booklet.
Page 348 of 456
347 Practical hints
What to do if …?
Display
Possible cause/consequence
Possible solution
±
VISIT WORKSHOP
There may be a malfunction in the:
Fuel injection system
Ignition system
Exhaust system
Fuel system
Visit an authorized Mercedes-Benz
Center as soon as possible.
B
COOLANT
CHECK LEVEL
The coolant level is too low.
Add coolant (
page 280).
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 Limited
Warranty.
Do not drive without a sufficient
amount of coolant in the cooling sys-
tem. The engine will overheat, causing
major engine damage.
Page 349 of 456

348 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
Ï
COOLANT
STOP, ENGINE OFF
The coolant is too hot.
Stop the vehicle in a safe location 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 353 of 456

352 Practical hintsWhat to do if …?When the message:ADD 1.0 QT. OIL
AT FILLING STATION(Canada:
1.0 LITER
)
appears while the engine is running and at
operating temperature, the engine oil level
has dropped to approximately the mini-
mum level.When this occurs, the warning will first
come on intermittently and then stay on if
the oil level drops further.
Visually check for oil leaks. If no obvious oil
leaks are noted, drive to the nearest ser-
vice station where the engine oil should be
topped to the required level with an ap-
proved oil specified in the Factory
Approved Service Products pamphlet.
Display
Possible cause/consequence
Possible solution
:
ENGINE OIL LEVEL
VISIT WORKSHOP
The engine oil has dropped to a critical
level.
Check the engine oil level (
page 275)
and add engine oil as required
(
page 278).
If you must add engine oil frequently,
have the engine checked for possible
leaks.
There is water in the engine oil.
Have the engine oil checked.
OIL SENSOR MALFUNCT.
VISIT WORKSHOP
The measuring system is malfunctioning.
Have the measuring system checked by
an authorized Mercedes-Benz Center.
!The engine oil level warnings should
not be ignored. Extended driving with
the symbol displayed could result in
serious engine damage that is not
covered by the Mercedes-Benz Limited
Warranty.
Page 362 of 456
361 Practical hints
What to do if …?
Tire inflation pressure monitor
messagesDisplay
Possible cause/consequence
Possible solution
TIRE PRES. MONITOR
REACTIVE AFTER
CORRECTING PRESSURE
There was a tire inflation pressure warning
message.
The yellow warning lamp for the tire infla-
tion pressure monitor comes on and you
have not reactivated the system since the
last tire inflation pressure check.
Activate the tire inflation pressure monitor
after correcting the tire inflation pressure
values (
page 294).
TIRE PRESSURE
DISPLAY ONLY
AVAILABLE WHEN
IGNITION IS ON
Switch on the ignition (
page 34).
TIRE PRES. MONITOR
REACTIVATED
The tire inflation pressure monitor is using
the current pressure values as the basis for
monitoring.
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. Contin-
ued driving with a flat tire will cause exces-
sive heat build-up and possibly a fire.
Page 363 of 456

362 Practical hintsWhat to do if …?Display
Possible cause/consequence
Possible solution
TIRE PRES. MONITOR
CURRENTLY
UNAVAILABLE
The tire inflation pressure monitor* is un-
able to monitor the tire inflation pressure
due to:
the presence of several wheel sensors
in the vehicle
excessive wheel sensor temperatures
a nearby radio interference source
unrecognized wheel sensors installed
Remove any extra wheel sensors from the
vehicle.
As soon as the causes of the malfunction have
been removed, the tire inflation pressure moni-
tor automatically becomes active again.
TIRE PRES. MONITOR
NOT OPERATIONAL
DRIVE TO WORKSHOP
The tire inflation pressure monitor or a
wheel sensor is malfunctioning.
Have the tire inflation pressure monitor
checked by an authorized Mercedes-Benz
Center.
A wheel without proper sensor was in-
stalled.
Have the wheels checked.
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. Contin-
ued driving with a flat tire will cause exces-
sive heat build-up and possibly a fire.
Page 364 of 456
363 Practical hints
What to do if …?
Display
Possible cause/consequence
Possible solution
H
TIRE PRESSURE
PLEASE CORRECT
The pressure is too low in one or more
tires.
Check and correct tire inflation pressure
as required (
page 294).
TIRE PRESSURE
CAUTION, TIRE PRES.
One or more tires are deflating.
Carefully bring the vehicle to a halt, avoid-
ing abrupt steering and braking maneu-
vers. Observe the traffic situation around
you.
Change the damaged wheel
(page 386).
Have the damaged wheel repaired or re-
placed at an authorized Mercedes-Benz
Center.
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. Contin-
ued driving with a flat tire will cause exces-
sive heat build-up and possibly a fire.