2003 MERCEDES-BENZ C320 4MATIC WAGON Owner's Manual

255 Practical hints
What to do if …
Problem
Possible cause
Suggested solution
-
The yellow ABS malfunction indi-
cator lamp comes on while driv-
ing.
The ABS has detected a malfunction and has
switched off. The BAS and the ESP are also
switched off (see messages in display).
The brake system is still functioning normally
but without the ABS available.

Continue driving with added caution.
Wheels may lock during hard braking
reducing steering capability.

Have the system checked at an autho-
rized Mercedes-Benz Center as soon
as possible.
Failure to follow these instructions in-
creases the risk of an accident.
The charging voltage has fallen below
10 volts and the ABS has switched off.

When the voltage is above this value
again, the ABS is operational again.

If necessary, have the generator and
battery checked.
S203 MY03_A.book Page 255 Tuesday, January 28, 2003 2:22 PM

256 Practical hintsWhat to do if …Problem
Possible cause
Suggested solution
1
The red SRS indicator lamp lights
up while driving.
There is a malfunction in the restraint sys-
tems. The airbags or emergency tensioning
device (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 result in an acci-
dent and/or injury to you or to others.
S203 MY03_A.book Page 256 Tuesday, January 28, 2003 2:22 PM

257 Practical hints
What to do if …
Problem
Possible cause
Suggested solution
3
;
(Canada only)
(USA only)The red brake warning lamp
lights up while driving and you
hear a warning sound.
You are driving with the parking brake set.

Release the parking brake (
page 46).
The red brake warning lamp
lights up while driving.
There is insufficient brake fluid in the reser-
voir.

Risk of accident! Carefully 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 the brake warning lamp illumi-
nated can result in an accident. Have your
brake system checked immediately if the
brake warning lamp stays on. Don’t add
brake fluid before checking the brake sys-
tem. Overfilling the brake fluid reservoir 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.
S203 MY03_A.book Page 257 Tuesday, January 28, 2003 2:22 PM

258 Practical hintsWhat to do if …Problem
Possible cause
Suggested solution
?
The yellow “CHECK ENGINE”
malfunction indicator lamp
comes on while driving.
There is a malfunction in:

The fuel management system


The ignition system


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 sys-
tem. It allows the accurate identifica-
tion of system malfunctions through
the readout of diagnostic trouble
codes. It is located in the front left
area of the footwell next to the park-
ing brake pedal.
The fuel cap is not closed tight.

Check the fuel cap.
Your gas tank is empty.

After refuelling start the engine three
or four times in succession.
The limp-home mode is canceled. You do
not need to have your vehicle checked.
<
The red seat belt warning lamp
blinks for a brief period after
starting the engine.
The warning lamp reminds you to fasten seat
belts.

Fasten your seat belt.
The yellow fuel tank reserve warning lamp
lights up while driving.
The fuel level has gone below the reserve
mark.

Refuel at the next gas station
(page 232).
S203 MY03_A.book Page 258 Tuesday, January 28, 2003 2:22 PM

259 Practical hints
What to do if …
Lamp in center consoleProblem
Possible cause
Suggested solution
7
The indicator lamp lights up.
A BabySmart
TM child seat is installed on the
front passenger seat. Therefore the front
passenger airbag is switched off.
The system is malfunctioning when there is
no BabySmart
TM child seat installed on the
front passenger seat.

Have the system checked as soon as
possible by an authorized
Mercedes-Benz Center.
7
The indicator lamp does not light
up with a BabySmart
TM child
seat properly installed on the
front passenger seat.
The system is malfunctioning.

Make sure that there is nothing be-
tween seat cushion and child seat and
check installation of the child seat.

If the light remains out, have the sys-
tem checked as soon as possible by
an authorized Mercedes-Benz Center.
Do not use the BabySmart
TM restraint
to transport children on the front pas-
senger seat until the system has been
repaired.
S203 MY03_A.book Page 259 Tuesday, January 28, 2003 2:22 PM

260 Practical hintsWhat to do if …Messages in the display
The control system shows warning and
malfunction messages in the multifunction
display.
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 malfunction memory menu in
the control system (
page 115) 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 knob on the instrument
cluster.
Other messages of high priority and mes-
sages of less immediate priority (regular
display colors) can be cleared from the multifunction display using the reset knob
(
page 22) and are then stored in the mal-
function message memory (
page 115).
On the pages that follow, you will find a
compilation of all the messages that may
appear in the display. High priority mes-
sages appear on a red background.
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 the condition noted may
cause damage not covered by the
Mercedes-Benz Limited Warranty, or result
in property damage or personal injury.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.
iTurning the key in starter switch to
position2 causes all lamps as well as
the multifunction display to come on.
Ensure that they are all in working or-
der before starting your journey.
S203 MY03_A.book Page 260 Tuesday, January 28, 2003 2:22 PM

261 Practical hints
What to do if …
Display
Possible cause
Suggested solution
-
ABS SYSTEM
VISIT WORKSHOP!
The ABS has detected a malfunction and
has switched off. The ESP and the BAS
are also deactivated. The brake system is
still functioning normally but without the
ABS available.

Continue driving with added cau-
tion. Wheels will lock in hard brak-
ing reducing steering capability.

Have the system checked at an au-
thorized Mercedes-Benz Center as
soon as possible.
Failure to follow these instructions in-
creases the risk of accident.
DISPLAY DEFECTIVE
VISIT WORKSHOP!
The ABS or the ABS display is malfunc-
tioning.

Continue driving with added cau-
tion. Wheels will lock in hard brak-
ing reducing steering capability.

Have the system checked at an au-
thorized Mercedes-Benz Center as
soon as possible.
Failure to follow these instructions in-
creases the risk of accident.
S203 MY03_A.book Page 261 Tuesday, January 28, 2003 2:22 PM

262 Practical hintsWhat to do if …Display
Possible cause
Suggested solution
BAS
BRAKE ASSIST
NOT AVAILABLE!
The charging voltage has fallen below
10 volts and the BAS has switched off.

When the voltage is above this val-
ue again, the BAS is operational
again.

If necessary, have the generator
and battery checked.
BRAKE ASSIST
VISIT WORKSHOP!
The BAS has detected a malfunction and
switched off. The brake system is still
functioning normally but without the BAS
available.

Continue driving with added cau-
tion.

Have the system checked at an au-
thorized Mercedes-Benz Center as
soon as possible.
Failure to follow these instructions in-
creases the risk of accident.
DISPLAY DEFECTIVE
VISIT WORKSHOP!
The BAS or the BAS display is malfunc-
tioning.

Continue driving with added cau-
tion.

Have the system checked at an au-
thorized Mercedes-Benz Center as
soon as possible.
Failure to follow these instructions in-
creases the risk of accident.
S203 MY03_A.book Page 262 Tuesday, January 28, 2003 2:22 PM