2003 MERCEDES-BENZ C CLASS COUPE check engine light

Contents
Air recirculation mode .................. 154
Charcoal filter .............................. 156
Rear window defroster ................. 156
Air conditioning ............................ 157
Residual heat and ventilation* ..... 158
Rear passenger compartment
adjustable air vents ...................... 158
Audio system ..................................... 159 Audio and telephone, operation ... 159
Operating safety ........................... 159
Operating and display elements ... 160
Button and soft key operation ...... 162
Operation ..................................... 162
Radio mode .................................. 165
Cassette mode ............................. 168
CD changer* operating mode ...... 172
Telephone* operation .................. 176
Power windows .................................. 182 Opening and closing the windows 182
Synchronizing power windows ..... 184
Panorama sliding/pop-up roof* ......... 185 Opening and closing the
sunshades for the panorama
sliding/pop-up roof ...................... 185
Opening and closing the panorama
sliding/pop-up roof ...................... 186 Synchronizing the panorama
sliding / pop-up roof ..................... 188
Driving systems ................................. 189 Cruise control .............................. 189
Loading .............................................. 192 Roof rack* ................................... 192
Luggage cover ............................. 192
Split folding rear bench seat ......... 192
Loading instructions .................... 194
Useful features .................................. 195 Interior storage spaces ................ 195
Ashtrays ....................................... 198
Cigarette lighter ........................... 199
Telephone* ................................... 200
Tele Aid* ...................................... 201
Garage door opener ...................... 209
Operation ......................................... 213
The first 1000 miles (1500km) .......... 214
Driving instructions ........................... 215 Drive sensibly – save fuel ............. 215
Drinking and driving ..................... 215
Pedals .......................................... 215
Power assistance .......................... 216
Brakes........................................... 216 Driving off .....................................217
Parking .........................................217
Tires ..............................................218
Hydroplaning ................................ 219
Tire traction ..................................219
Tire speed rating ...........................219
Winter driving instructions ............220
Standing water .............................221
Passenger compartment ...............221
Driving abroad ..............................221
Control and operation of radio
transmitter ....................................222
Catalytic converter .......................222
Emission control ...........................223
Coolant temperature ....................223
At the gas station ...............................224 Check regularly and before a
long trip ........................................225
Engine compartment .......................... 226 Hood .............................................226
Engine oil ......................................227
Transmission fluid level ................229
Coolant level .................................229
Battery ..........................................231
Windshield washer system and
headlamp cleaning system ...........232

56 Safety and SecurityOccupant safety
Occupant safetyIn this section you will learn the most im-
portant facts about the restraint systems
of the vehicle.
The restraint systems are

Seat belts


Emergency tensioning device


Airbags


Child seats


Child seat recognition


Lower anchors and tethers for children
(LATCH)
As independent systems their protective
effects work in conjunction with each oth-
er. The
1
warning lamp in the instrument
cluster lights up:


for about 4 seconds when you turn the
key in the starter switch to position 1.


for about 4 seconds when you start the
engine by turning the key. The warning lamp goes out shortly after
you start the engine.
This shows that the
restraint systems are operational.
A malfunction in the system has been de-
tected if the
1
warning lamp:


fails to extinguish after approximately
4seconds.


does not come on at all.


comes on after the engine was started
or while driving.
For safety reasons, we strongly recom-
mend that you visit an authorized
Mercedes-Benz Center immediately to
have the system checked.
More information can be found in the
“Practical hints” section (
page 248).
iFor information on infants and children
traveling with you in the vehicle and re-
straint systems for infants and chil-
dren, see “Children in the vehicle”
(page 65).
iThe warning lamp remains lit if the key
is turned to position 2 and left there.
The warning lamp will go out when you
start the engine.

109
Controls in detail
Control system
Menus, submenus and functions
Menu 1
Menu 2
Menu 3
Menu 4
Menu 5
Menu 6
Menu 7
Commands/submenusStandard dis-
play
AUDIO
NAV*
Malfunction
memory
Settings
Trip computer
Telephone
Coolant temper-
ature gauge
Select radio sta-
tion
Activate route
guidance
Call up malfunc-
tion messages
Reset to factory
settings
Fuel consumption
statistics after
start
Load phone
book
Digital speed-
ometer
Operate CD
player*
Instrument cluster
submenu
Fuel consumption
statistics since the
last reset
Search for name
in phone book
Call up FSS
Operate cas-
sette player
Lighting submenu
Call up range
Check engine oil
level
Vehicle submenuConvenience sub-
menu

148 Controls in detailClimate controlAir conditioning
The air conditioning is operational while
the engine is running and cools the interior
air to the temperature set by the operator.
Deactivating
It is possible to deactivate the air condi-
tioning (cooling) function of the climate
control system. The air in the vehicle will
then no longer be cooled or dehumidified.
Press buttonAC
OFF
(page 143).
The indicator lamp on the
button AC
OFF
lights up. Activating
Moist air can fog up the windows. You can
dehumidify the air with the air condition-
ing.

Press
AC
OFF
again (
page 143).
The indicator lamp on the
button AC
OFF
goes out.
The air conditioning system uses the refrig-
erant R134a. This refrigerant is free of
CFCs which are harmful to the ozone layer.
Ventilated storage compartment
The front center console storage compart-
ment has its own air vent that allows for
cooling ventilation when the climate con-
trol system is activated.
1 Lever
iCondensation may drip out from under-
neath the vehicle. This is normal and
not an indication of a malfunction.
!If the air conditioning cannot be turned
on again, this indicates that the air con-
ditioning system is losing refrigerant.
The compressor has turned itself off.
Have the air conditioning system
checked at the nearest authorized
Mercedes-Benz Center.
iYou should keep this air vent closed
when outside temperatures are low.

157
Controls in detail
Automatic climate control* (Canada only)
Air conditioning
The air conditioning is operational while
the engine is running and cools the interior
air to the temperature set by the operator.
Deactivating
It is possible to deactivate the air condi-
tioning (cooling) function of the automatic
climate control system. The air in the vehi-
cle will then no longer be cooled or dehu-
midified.
Press button
AC
OFF
(page 151).
The indicator lamp on the
button AC
OFF
lights up. Activating
Moist air can fog up the windows. You can
dehumidify the air with the air condition-
ing.

Press
AC
OFF
again (
page 151).
The indicator lamp on the
button AC
OFF
goes out.
The air conditioning system uses the refrig-
erant R134a. This refrigerant is free of
CFCs which are harmful to the ozone layer.
Warning!
G
Any accumulation of snow and ice should be
removed from the rear window before driv-
ing. Visibility could otherwise be impaired,
endangering you and others.!If the rear window defroster switches
off too soon and the indicator lamp
starts blinking, this means that too
many electrical consumers are operat-
ing simultaneously and there is insuffi-
cient voltage in the battery. The system
responds automatically by deactivating
the rear window defroster.
As soon as the battery has sufficient
voltage, the rear window defroster au-
tomatically turns itself back on.
iCondensation may drip out from under-
neath the vehicle. This is normal and
not an indication of a malfunction.
!If the air conditioning cannot be turned
on again, this indicates that the air con-
ditioning system is losing refrigerant.
The compressor has turned itself off.
Have the air conditioning system
checked at the nearest authorized
Mercedes-Benz Center.

225
Operation
At the gas station
Check regularly and before a long trip
1 Coolant level
More information on the coolant level
can be found in the “Operation” section
(
page 229).
2 Brake fluid (fuse box cover removed)
More information on brake fluid can be
found in the “Technical data” section
(page 317).
Removing fuse box cover see page
(page 303).
3 Windshield washer and headlamp
cleaning system
For more information on refilling the
reservoir, see the “Operation” section
(page 232). Engine oil level
More information on engine oil can be
found in the “Operation” section
(
page 227).
Opening hood see (
page 226).
Coolant
For normal replenishing, use water (pota-
ble water quality). More information on
coolant can be found in the“Operation”
section (
page 229).
Vehicle lighting
Check function and cleanliness. For more
information on replacing light bulbs, see
the “Practical hints” section (
page 280).
Exterior lamp switch (
page 96).
Tire inflation pressure
More information on tire inflation pressure
can be found in the “Operation” section
(
page 234).
iUse only premium unleaded gasoline
with a minimum Posted Octane Rating
of 91 (average of 96 RON / 86 MON).
Information on gasoline quality can
normally be found on the fuel pump.
More information on gasoline can be
found in the Factory Approved Service
Products pamphlet.iLeaving the engine running and the fuel
cap open can cause the
?
lamp to
illuminate.
More information can be found in the
“Practical hints” section (
page 250).

249
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.

250 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 impact 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 224).