Page 384 of 506

382 Practical hintsWhat to do if …Display symbol
Display messages
Possible cause
Possible solution
(USA only);(Canada only)3
Brake fluid
Visit workshop
There is insufficient brake fluid in the 
reservoir.
Risk of accident! Stop the vehicle and 
notify an authorized Mercedes-Benz 
Center. Do not add brake fluid! This 
will not solve the problem.
Warning!
G
Driving while these messages are displayed 
can result in an accident. Have your brake 
system checked immediately.
If there is a malfunction in the SBC brake 
system, we recommend that the vehicle be 
transported with all wheels off the ground 
using flatbed or appropriate 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 
u p  t o  3 0 m i l e s  ( 5 0 k m )  a n d  a t  a  s p e e d  n o t  t o  
exceed 30 mph (50 km / h). For more infor-
mation, refer to “Towing the vehicle” 
(page 439).
If the SBC brake system enters its emergen-
cy operation mode, the driver must apply 
significantly greater brake pedal pressure 
and depress the pedal much further than 
normal to obtain braking effect. If neces-
sary, apply full pressure to the brake pedal. 
Brakes may only be applied to the front 
wheels. Stopping distance is increased!
Do not add brake fluid before checking the 
brake system. Overfilling the brake fluid res-
ervoir can result in spilling brake fluid 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.!Brake pad thickness must be visually 
inspected by a qualified technician at 
the intervals specified in the 
Maintenance Booklet. 
     
        
        Page 385 of 506

383 Practical hints
What to do if …
Display symbol
Display messages
Possible cause
Possible solution
?
   (USA only)
±
   (Canada only)
Visit workshop
There may be a malfunction in the:
fuel injection system
ignition system
exhaust system
fuel system
Have the measuring system checked 
by an authorized Mercedes-Benz Cen-
ter.
B 
Coolant
Check level
The coolant level is too low.
Add coolant (
page 308).
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 sufficient amount 
of coolant in the cooling system. The 
engine will overheat causing major en-
gine damage. 
     
        
        Page 387 of 506
385 Practical hints
What to do if …
Display symbol
Display messages
Possible cause
Possible solution
Ï 
Coolant
Stop, engine off
The poly-V-belt could be broken.
Stop immediately and check the 
poly-V-belt.
If it is broken:
Do not continue to drive. Otherwise 
the engine will overheat due to an in-
operative water pump which may re-
sult in damage to the engine. 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 Warranty.
Drive immediately to the nearest au-
thorized Mercedes-Benz Center.
Coolant
Visit workshop
The cooling fan for the coolant is malfunc-
tioning.
Observe the coolant temperature dis-
play.
Have the fan replaced as soon as pos-
sible. 
     
        
        Page 388 of 506
386 Practical hintsWhat to do if …Display symbol
Display messages
Possible cause
Possible solution
G
Display malfunction 
Visit workshop 
The displays for several systems have 
malfunctioned. Some systems them-
selves may also have malfunctioned.
Continue driving with added caution.
When the display is malfunctioning, 
warnings and malfunction messages 
might not be displayed.
Have the electronic systems checked 
by an authorized Mercedes-Benz Cen-
ter.
± 
Display malfunction
Visit workshop
Certain electronic systems are unable to 
relay information to the control system. 
The following systems may have failed:
Coolant temperature display
Tachometer
Cruise control display
Have the electronic systems checked 
by an authorized Mercedes-Benz Cen-
ter.
J
 
Doors open
You are attempting to drive with one or 
more doors open.
Close the doors. 
     
        
        Page 390 of 506

388 Practical hintsWhat to do if …When the 
Engine oil - Visit workshop
 
message appears while the engine is run-
ning and at operating temperature, the en-
gine 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.
Display symbol
Display messages
Possible cause
Possible solution
: 
Engine oil
Visit workshop
The engine oil has dropped to a critical 
level.
Check the engine oil level 
(page 305) and add oil as required 
(page 306).
If you must add engine oil frequently, 
have the engine checked for possible 
leaks.
It may be that there is water in the engine 
oil.
Have the engine oil checked.
Engine oil level
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 394 of 506

392 Practical hintsWhat to do if …Display symbol
Display messages
Possible cause
Possible solution
. 
Brake lamp
Drive to workshop
Brake lamp illumination is delayed or 
lamp is permanently on.
Visit an authorized Mercedes-Benz 
Center as soon as possible.
Brake lamp, left
Substitute bulb on
The left brake lamp is malfunctioning. A 
substitute bulb is being used.
Visit an authorized Mercedes-Benz 
Center as soon as possible.
Brake lamp, right
Substitute bulb on
The right brake lamp is malfunctioning. A 
substitute bulb is being used.
Visit an authorized Mercedes-Benz 
Center as soon as possible.
Display malfunction
Visit workshop
The display for the lamps or the system is 
malfunctioning.
Visit an authorized Mercedes-Benz 
Center as soon as possible.
Front foglamp,
left
The left front fog lamp is malfunctioning.
Replace the bulb as soon as possible.
Front foglamp,
right
The right front fog lamp is malfunctioning.
Replace the bulb as soon as possible.
Active Hdlmp.
currently
unavailable
The Bi-Xenon cornering lamps system is 
malfunctioning.
Visit an authorized Mercedes-Benz 
Center as soon as possible.
Active Hdlmp.
malfunction
Drive to workshop
The Bi-Xenon cornering lamps system is 
malfunctioning.
Visit an authorized Mercedes-Benz 
Center as soon as possible. 
     
        
        Page 396 of 506
394 Practical hintsWhat to do if …Display symbol
Display messages
Possible cause
Possible solution
. 
High beam,
left
The left high beam lamp is malfunction-
ing.
Replace the bulb as soon as possible.
High beam,
right
The right high beam lamp is malfunction-
ing.
Replace the bulb as soon as possible.
License plate lamp,
left
The left license plate lamp is malfunction-
ing.
Replace the bulb as soon as possible.
License plate lamp,
right
 
The right license plate lamp is malfunc-
tioning.
Replace the bulb as soon as possible.
Light sensor
Drive to workshop
The lamp sensor is malfunctioning. The 
headlamps switch on automatically.
In the control system, set lamp opera-
tion to manual mode (
page 162).
Switch on headlamps using the exteri-
or lamp switch.
Low beam,
left
The left low beam lamp is malfunctioning.
Halogen headlamp:
Replace the bulb as soon as possible.
Bi-Xenon* headlamp:
Visit an authorized Mercedes-Benz 
Center as soon as possible. 
     
        
        Page 405 of 506
403 Practical hints
What to do if …
Display symbol
Display messages
Possible cause
Possible solution
<
Seat belt system
Drive to workshop
The seat belt system is malfunctioning.
Visit an authorized Mercedes-Benz 
Center as soon as possible.
9
Service memory full
See Operator’s Manual
The maintenance service system memory 
cannot save any more data.
Have the service memory checked by 
an authorized Mercedes-Benz Center.
K
Close
Sunroof
You have opened the driver’s door with 
the SmartKey removed from the starter 
switch and the tilt/sliding sunroof open.
Close the tilt/sliding sunroof 
(page 224).
J
Close
Sunroof
You have opened the driver’s door with 
the SmartKey removed from the starter 
switch and the tilt/sliding sunroof open.
Close the tilt/sliding sunroof 
(page 224).