Page 363 of 480

362 Practical hintsWhat to do if …Left display
Right display
Possible cause/consequence
Possible solution
USA only:;Canada only:3
Reduced
brake effect
Visit
workshop
The electro-hydraulic brake system
is in emergency operation mode.
Considerable brake pedal force is
required and the stopping distance
is increased.
Continue driving with added caution.
Adjust driving to be consistent with reduced
braking responsiveness.
Visit an authorized Mercedes-Benz Center im-
mediately. Adjust driving to be consistent
with reduced braking responsiveness.
Warning!
G
Driving while this message is displayed can
result in an accident. Have your brake sys-
tem checked immediately.
If there is a malfunction in the
electro-hydraulic brake system, we recom-
mend that the vehicle be transported with
all wheels off the ground using flatbed or ap-
propriate wheel lift/dolly equipment.
A tow bar must be used if circumstances do
not permit the use of the recommended
towing methods and the vehicle requires
towing with all four wheels on the ground.
Towing the vehicle with all four wheels on
the ground is only permissible for distances
up to 30 miles (50 km) and at a speed not to
exceed 30 mph (50 km/h). For more infor-
mation, see “Towing the vehicle”
(page 421).
If the electro-hydraulic brake system enters
its emergency operation mode, the driver
must apply significantly greater brake pedal
pressure and depress the pedal much fur-
ther than normal to obtain braking effect.
If necessary, apply full pressure to the brake
pedal. Brakes are only applied to the front
wheels. Stopping distance is increased!
Page 364 of 480
363 Practical hints
What to do if …
Left display
Right display
Possible cause/consequence
Possible solution
USA only:;Canada only:3
Brake fluid
below min. level
Visit
workshop
There is insufficient brake fluid in
the reservoir.
Risk of accident! Stop the vehicle in a safe lo-
cation or as soon as it is safe to do so and no-
tify an authorized Mercedes-Benz Center. Do
not add brake fluid! This will not solve the
problem.
Warning!
G
Driving with the message
Brake fluid
below min level Visit workshop
dis-
played 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 en-
gine 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 366 of 480

365 Practical hints
What to do if …
Left display
Right display
Possible cause/consequence
Possible solution
±
Engine
Service
There may be a malfunction in the
fuel injection system
ignition system
exhaust system
fuel system
Have the engine checked as soon as possible
by an authorized Mercedes-Benz Center
(page 335).
B
Coolant
Check level
The coolant level is too low.
Add coolant (
page 278).
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
this message and symbol displayed
may cause serious engine damage not
covered by the Mercedes-Benz Limited
Warranty. Do not drive without suffi-
cient amount of coolant in the cooling
system. The engine will overheat, caus-
ing major engine damage.
Page 367 of 480

366 Practical hintsWhat to do if …
During severe operating conditions, e.g.
stop-and-go traffic, the coolant tempera-
ture may rise close to 248°F (120°C).
Left display
Right display
Possible cause/consequence
Possible solution
•
Coolant
Stop, put 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 message
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 369 of 480
368 Practical hintsWhat to do if …Left display
Right display
Possible cause/consequence
Possible solution
•
Coolant
Visit
workshop
The cooling fan for the coolant is
malfunctioning.
Observe the coolant temperature gauge.
Have the fan replaced as soon as possible.
G
Display malfunction
Visit
workshop!
The displays for several systems
have malfunctioned. Some systems
themselves may also have malfunc-
tioned.
Continue driving with added caution.
When the display is malfunctioning, warnings
and malfunction messages might not be dis-
played.
Have the electronic systems checked by an
authorized Mercedes-Benz Center.
±
Display malfunction
Visit workshop
Certain electronic systems are un-
able to relay information to the con-
trol system. The following systems
may have failed:
Coolant temperature gauge
Tachometer
Cruise control display
Have the electronic systems checked by an
authorized Mercedes-Benz Center
(page 335).
Page 371 of 480

370 Practical hintsWhat to do if …When the message
Add 1 qt engine oil
at next refueling (Canada:
1l
) appears
while the engine is running and at
operating temperature, the engine oil level
has dropped to approximately the
minimum level.When this occurs, the warning will first
come on intermittently and then stay on if
the oil level drops further.
If no oil leaks are noted, continue to drive
to the nearest service station where the
engine oil should be topped to the required
level with an approved oil specified in the
Factory Approved Service Products pam-
phlet.
Left display
Right display
Possible cause/consequence
Possible solution
N
Engine oil
Visit workshop!
It may be that there is water in the
engine oil.
Have the engine oil checked.
Engine oil level
Visit workshop
The engine oil has dropped to a crit-
ical level.
Check the engine oil level (
page 274) and
add oil as required (
page 276).
If you must add engine oil frequently, have the
engine checked for possible leaks.
The measuring system is malfunc-
tioning.
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 381 of 480

380 Practical hintsWhat to do if …Left display
Right display
Possible cause/consequence
Possible solution
H
Please rectify
tire pressure
The tire inflation pressure is too
low in one or more tires.
Check and correct tire inflation pressure as required
(page 293).
Tire pressure
Caution
Tire defect
One or more tires is deflating.
Carefully bring the vehicle to a halt, avoiding abrupt
steering and braking maneuvers. Observe the traffic
situation around you.
If necessary, change the wheel (
page 399).
Vehicles with TIREFIT: Temporarily repair tire using
TIREFIT (
page 399) or contact Roadside Assistance.
If tire cannot be temporarily repaired using TIREFIT,
contact Roadside Assistance.
Have the damaged wheel repaired or replaced at an au-
thorized 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. Continued
driving with a flat tire will cause excessive
heat build-up and possibly a fire.
Page 382 of 480
381 Practical hints
What to do if …
Left display
Right display
Possible cause/consequence
Possible solution
H
Tire pressure
Check tires
The tire pressure in one or more
tires is already below the mini-
mum value.
Carefully bring the vehicle to a halt, avoiding abrupt
steering and braking maneuvers.
Check and adjust tire pressure as required.
If necessary, change the wheel.
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.