2005 MERCEDES-BENZ E320CDI Center

359 Practical hints
What to do if …
Problem
Possible cause
Suggested solution
?
(USA only)
±
(Canada only)
The yellow engine malfunction
indicator lamp comes on while
driving.
There is a malfunction in:

The fuel management system


The ignition system (Gasoline engine)


The emission control system


Systems which affect emissions
Such malfunctions may result in excessive
emissions values and may switch the engine
to its limp-home (emergency operation)
mode.

Have the vehicle checked as soon as
possible by an authorized
Mercedes-Benz Center.
An on-board diagnostic connector is
used by the service station to link the
vehicle to the shop diagnostics system.
It allows the accurate identification of
system malfunctions through the read-
out of diagnostic trouble codes. It is lo-
cated in the front left area of the
footwell next to the parking brake.
A loss of pressure has been detected in the
fuel system. The fuel cap may not be closed
properly or the fuel system may be leaky.

Check the fuel cap.
If it is not closed properly:

Close the fuel cap.
If it is closed properly:

Have the fuel system checked by an au-
thorized Mercedes-Benz Center.

360 Practical hintsWhat to do if …?
(USA only)
±
(Canada only)
The yellow engine malfunction
indicator lamp comes on while
driving.
Your fuel tank is empty.

After refuelling start, turn off and re-
start the engine three or four times in
succession.
The limp-home mode is canceled. You do
not need to have your vehicle checked.
Diesel engine: The fuel tank is empty. The en-
gine is running in emergency operation
mode.

Bleed the fuel system (
page 432).
The limp-home mode is canceled. You do
not need to have your vehicle checked.
Diesel engine: The diesel engine electronics
are malfunctioning.
Full engine performance is not available.

Have the fuel system checked by an au-
thorized Mercedes-Benz Center.
Problem
Possible cause
Suggested solution

361 Practical hints
What to do if …
Problem
Possible cause
Suggested solution
D
The red coolant warning lamp
comes on when the engine is
running.
There is insufficient coolant in the reservoir.
If this warning lamp comes on frequently,
there is a leak in the cooling system.
If the coolant level is correct, the electric ra-
diator fan may be broken.

Immediately add coolant to prevent
engine from overheating
(page 308).

Have the cooling system checked.

If the coolant temperature is below
257°F (125°C), you can continue
driving to the nearest authorized
Mercedes-Benz Center.

Avoid high engine loads (e.g. driving
uphill) and stop-and-go driving.
D
The red coolant warning lamp
comes on while driving and you
hear a warning sound.
The coolant temperature has exceeded
257°F (125°C).

Stop as soon as possible and allow
the engine and coolant to cool down.
l
The red DTR warning lamp
comes on while driving.
You are too close to the vehicle in front of you
to maintain selected speed.

Apply the brakes immediately to in-
crease the following distance.
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.

364 Practical hintsWhat to do if …Problem
Possible cause
Suggested solution
1
The red SRS indicator lamp
comes on while driving.
There is a malfunction in the restraint sys-
tems. The air bags or emergency tensioning
devices (ETDs) could deploy unexpectedly or
fail to activate in an accident.

Drive with added caution to the near-
est authorized Mercedes-Benz Cen-
ter.
Warning!
G
In the event a malfunction of the SRS is indi-
cated as outlined above, the SRS may not be
operational. For your safety, we strongly
recommend that you visit an authorized
Mercedes-Benz Center immediately to have
the system checked; otherwise the SRS may
not be activated when needed in an acci-
dent, which could result in serious or fatal
injury, or it might deploy unexpectedly and
unnecessarily which could also result in an
accident and/or injury to you or to others.

365 Practical hints
What to do if …
Lamp in center consoleProblem
Possible cause
Suggested solution
75The indicator lamp illuminates and remains
illuminated with the weight of a typical adult
or someone larger than a small individual on
the front passenger seat.
The system is malfunctioning.

Have the system checked as soon as
possible by an authorized
Mercedes-Benz Center.

Also note any messages in the
multifunction display and follow cor-
rective steps (
page 374).
Warning!
G
If the
75
indicator lamp illumi-
nates and remains illuminated with the
weight of a typical adult or someone larger
than a small individual on the front passen-
ger seat, do not have any passenger use the
front passenger seat until the system has
been repaired.

366 Practical hintsWhat to do if …Problem
Possible cause
Suggested solution
75The indicator lamp does not illuminate
and/or does not remain illuminated with
the weight of a typical 12-month-old child in
a standard child restraint or less on the
front passenger seat.
The system is malfunctioning.

Make sure that there is nothing between seat cush-
ion and child seat and check installation of the child
seat.

Make sure that no objects applying supplemental
weight onto the seat are present.

Make sure that no objects which apply forces to the
seat are present (e.g. objects such as books, brief-
cases etc. lodged behind or around the seat, head
restraints pushing against roof etc.). The system
may recognize such forces as supplemental weight.

If the light remains out, have the system checked as
soon as possible by an authorized Mercedes-Benz
Center. Do not transport a child on the front passen-
ger seat until the system has been repaired.

Also note any messages in the multifunction display
and follow corrective steps (
page 374).
Warning!
G
If the
75
indicator lamp does not
illuminate or remains out with the
weight of a typical 12-month-old child in a
standard child restraint or less on the front
passenger seat, do not transport a child on
the front passenger seat until the system
has been repaired.

367 Practical hints
What to do if …
Vehicle status messages in the multi-function 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 145) displays both cleared and
uncleared messages.
High-priority messages appear in the mul-
tifunction display in red color.Certain messages of high priority cannot
be cleared from the multifunction display
using the reset button (
page 24) or
buttonj, k, è orÿ on the
multifunction steering wheel.
Other messages of high priority and mes-
sages of less immediate priority can be
cleared from the multifunction display us-
ing the reset button or buttonj, k,
è orÿ on the multifunction steer-
ing wheel. They are then stored in the vehi-
cle status message memory (
page 153).
Remember that clearing a message will
only make the message disappear. Clear-
ing a message will not correct the condi-
tion 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.Warning!
G
No messages will be displayed if either the
instrument cluster or the multifunction dis-
play is inoperative.
Contact the nearest authorized
Mercedes-Benz Center.

369 Practical hints
What to do if …
Text messagesDisplay
Display message
Possible cause
Possible solution
ABS
Malfunction
Visit workshop
The ABS has detected a malfunction
and has switched off.
The ESP and the BAS are also deac-
tivated.
The SBC brake system is still func-
tioning normally but without the ABS
available.

Continue driving with added caution.
Wheels will lock during hard braking, reduc-
ing steering capability.

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.
Display malfunction
Visit workshop
The ABS or the ABS display is mal-
functioning.

Continue driving with added caution.
Wheels will lock during hard braking, reduc-
ing steering capability.

Visit an authorized Mercedes-Benz Center
as soon as possible.
Failure to follow these instructions increases
the risk of an accident.