Page 346 of 464

346 Practical hintsWhat to do if …4
The yellow fuel reserve warning lamp
flashes after starting the engine.
The fuel cap is not closed properly.
Close the fuel cap.
<
The red seat belt telltale comes on
after starting the engine and with all
doors closed.
The seat belt telltale reminds you
and your passenger to fasten your
seat belts.
Fasten your seat belts.
For more information, see “Seat belts”
(page 69).
1
The red SRS indicator lamp comes
on while driving.
There is a malfunction in the re-
straint systems. The air bags or
emergency tensioning devices
(ETDs) could deploy unexpectedly or
fail to deploy in an accident.
Drive with added caution to the nearest au-
thorized Mercedes-Benz Center.
Problem
Possible cause
Suggested solution
Warning!
G
In the event that a malfunction of the SRS is
indicated as outlined above, the SRS may
not be operational. For your safety, we
strongly recommend that you visit an
authorized Mercedes-Benz Center immedi-
ately to have the system checked;
otherwise the SRS may not be activated
when needed in an accident, which could re-
sult in serious or fatal injury, or it might de-
ploy unexpectedly and unnecessarily which
could also result in an accident and/or
injury to you or to others.
Page 348 of 464

348 Practical hintsWhat to do if …Vehicle status messages in the multifunction display
Warning and malfunction messages ap-
pear in the multifunction display located in
the instrument cluster.
Certain warning and malfunction messag-
es are accompanied by an audible signal.
Address these messages accordingly and
follow the additional instructions given in
this Operator’s Manual.
Selecting the vehicle status message
memory menu in the control system
(page 126) displays both cleared and
uncleared messages.
High-priority messages appear in the
multifunction display in red color.Certain messages of high priority cannot
be cleared from the multifunction display
using the reset buttonJ (
page 24) or
buttonj, k, ·, orè on the
stering wheel.
Other high-priority messages and messag-
es of less immediate priority (regular dis-
play colors) can be cleared from the
multifunction display using the reset
buttonJ (
page 24) or buttonj,
k, ·, orè on the stering wheel.
They are then stored in the vehicle status
message memory (
page 126). Remem-
ber that clearing a message will only make
the message disappear. Clearing a mes-
sage will not correct the condition that
caused the message to appear.
Warning!
G
All categories of messages contain impor-
tant information which should be taken note
of and, where a malfunction is indicated, ad-
dressed as soon as possible at an autho-
rized Mercedes-Benz Center.
Failure to repair condition noted may cause
damage not covered by the Mercedes-Benz
Limited Warranty, or result in property dam-
age or personal injury.
Page 349 of 464
349 Practical hints
What 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 multifunction display.
For your convenience the messages are
divided into two sections:
Text messages (
page 350)
Symbol messages (
page 355)
Warning!
G
No messages will be displayed if either the
instrument cluster or the multifunction dis-
play is inoperative.
Contact your nearest authorized
Mercedes-Benz Center.
iSwitching on ignition (
page 35)
causes all instrument cluster lamps
(except high beam headlamp indicator
lamp and turn signal indicator lamps
unless activated) as well as the multi-
function display to come on. Make sure
the lamps and multifunction display are
in working order before starting your
journey.
Page 354 of 464

354 Practical hintsWhat to do if …Display messages
Possible cause
Possible solution
Run Flat Indicator
inactive
The Run Flat Indicator is malfunc-
tioning.
Have the Run Flat Indicator checked by an autho-
rized Mercedes-Benz Center.
Low pressure mode
Check tires
max. Speed 50 mph(Canada:max. Speed 80 km/h
)
The pressure is too low 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 the tire inflation pressure as re-
quired (
page 308).
If necessary, change the wheel (
page 388).
Reactivate the Run Flat Indicator after adjusting
the tire inflation pressure values (
page 284).
Check tires
Then reactivate
Run Flat Indicator
There was a warning message about
a loss in tire inflation pressure and
the Run Flat Indicator has not been
reactivated yet.
Make sure that the correct tire inflation pressure
is set for each tire.
Then reactivate the Run Flat Indicator.
Run Flat Indicator
unavailable
The Run Flat Indicator has been
switched off due to an error.
Have the Run Flat Indicator checked by an autho-
rized 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.
Page 356 of 464

356 Practical hintsWhat to do if …Display symbol
Display message
Possible cause
Possible solution
USA only:;Canada only:!
Release
parking brake
You are driving with the parking
brake set.
Release parking brake (
page 49).
2
Brake wear
Visit workshop
The brake pads have reached their
wear limit.
Have the brake pads replaced as soon as
possible.
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 with this message displayed can re-
sult in an accident. Have your brake system
checked immediately. Do not add brake flu-
id before checking the brake system.
Overfilling the brake fluid reservoir can re-
sult 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
checked by a qualified technician at the
intervals specified in the Maintenance
Booklet.
Page 358 of 464

358 Practical hintsWhat to do if …Display symbol
Display message
Possible cause
Possible solution
Ï
Coolant
Stop, engine off
The coolant is too hot.
Stop the vehicle and turn off the engine.
Only start the engine again after the mes-
sage disappears. You could otherwise dam-
age the engine.
/
Coolant
Check level
The coolant level is too low.
Add coolant (
page 293).
If you have to add coolant frequently, have
the cooling system checked by an autho-
rized Mercedes-Benz Center.
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 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.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 sufficient amount
of coolant in the cooling system. The
engine will overheat, causing major en-
gine damage.
Page 359 of 464

359 Practical hints
What to do if …
Display symbol
Display message
Possible cause
Possible solution
±
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 display
Tachometer
Cruise control display
Have the electronic systems checked by an
authorized Mercedes-Benz Center.
G
Display malfunction
Visit workshop
The instrument cluster display is
malfunctioning.
When the display is malfunctioning, warnings
and malfunction messages might not be dis-
played.
Continue driving with added caution.
Visit an authorized Mercedes-Benz Center
as soon as possible.
The displays for several systems
have malfunctioned. Some systems
themselves may also have malfunc-
tioned.
Continue driving with added caution.
Have the electronic systems checked by an
authorized Mercedes-Benz Center.
J
Doors open
You are attempting to drive with
one or more doors open.
Close all doors.
Page 360 of 464

360 Practical hintsWhat to do if …When the message
Add 1 qt.
(Canada:
1 liter
) engine oil when next
refueling (SLK 55 AMG) or
Check oil
level when next refueling (SLK 350)
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.
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 symbol
Display message
Possible cause
Possible solution
:
USA only:Add 1 qt. engine oil
when next refuelingCanada only:Add 1 liter engine oil
when next refueling
SLK 55 AMG only:
The engine oil level is too low.
Add engine oil (
page 292) and check the
engine oil level (page 288).
Check oil level
when next refueling
SLK 350 only:
The engine oil level has dropped to
a critical level.
Check the engine oil level (
page 288) and
add engine oil as required (page 292).
If you must add engine oil frequently, have
the engine checked for possible leaks.
!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.