2003 MERCEDES-BENZ C320 COUPE hood open

258 Practical hintsWhat to do if …
During severe operating conditions and
stop-and-go city traffic, the coolant tem-
perature may rise close to 120°C.
Display
Possible cause
Suggested solution
Ï
COOLANT
STOP, ENGINE OFF!
The coolant is too hot.

Stop the vehicle and turn off the en-
gine.

Only start the engine again after the
message disappears. You could oth-
erwise damage the engine.
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 it
cools 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.

263 Practical hints
What to do if …
When the “ENGINE OIL LEVEL – CHECK
LEVEL!” message appears while the engine
is running and at operating temperature,
the engine oil level is low.
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 gas station where the en-
gine oil should be filled up with an ap-
proved oil (
page 227).
!The engine oil level warnings should
not be ignored. Extended driving with
the symbol displayed could result in se-
rious engine damage that is not cov-
ered by the Mercedes-Benz Limited
Warranty.
Display
Possible cause
Suggested solution
A
RESERVE FUEL
VISIT FILLING STATION!
The fuel level has dropped below the re-
serve mark.

Refuel at the next gas station
(page 224).
Y
HOOD OPEN!
You are driving with the hood open.

Close the hood (
page 226).
I
REPLACE KEY
VISIT WORKSHOP!
No additional code available for SmartKey.

Change the batteries (
page 294).
AUTOM. LIGHT ON
REMOVE KEY!
You have forgotten to remove the key.

Remove the key from the starter
switch.
.
LAMP SENSOR
VISIT WORKSHOP!
The lamp sensor is malfunctioning. The
headlamps switch on automatically.

Set lamp operation to manual.

Switch on headlamps using the exte-
rior lamp switch.

282 Practical hintsReplacing bulbsReplacing bulbs for front lamps
Halogen headlamps
1Bulb socket for turn signal lamp
2Headlamp cover for high beam head-
lamp and for parking and standing
lamp
3Headlamp cover for low beam head-
lamp4Low beam bulb
5High beam bulb
6Parking and standing lamp
Low and high beam bulb

Switch off the lights.

Open the hood (
page 226).

Turn headlamp cover2 or 3 to the left
and remove.

Turn bulb holder with bulb to the left
and pull out.

Pull out the bulb from the base (do not
pull on glass tube).

Insert new bulb so that the base fits in
the bulb holder recess and is level.

Place the bulb holder with bulb on the
headlamp mounting and turn the bulb
holder to the right until it engages.

Replace headlamp cover2 or 3 and
turn to the right until it engages.
Front turn signal lamp bulb

Switch off the lights.

Open the hood (
page 226).

Turn bulb socket1 to the left and pull
out.

Push bulb into socket, turn to the left
and remove.

Insert new bulb in socket, push in and
turn to the right.

Reinsert bulb socket in lamp and turn
to the right.

283 Practical hints
Replacing bulbs
Parking and standing lamp bulb
Switch off the lights.

Open the hood (
page 226).

Turn headlamp cover2 to the left and
remove.

Pull out the bulb socket with the bulb.

Pull the bulb out of the bulb socket.

Insert a new bulb in the socket.

Reinstall the bulb socket.

Replace headlamp cover2 and turn to
the right until it engages.Bi-Xenon* headlamps
1Bulb socket for turn signal lamp
2Headlamp cover for high beam head-
lamp3Headlamp cover for Bi-Xenon head-
lamp
4High beam bulb
5Bulb holder
6Parking and standing lamp
High beam bulb

Switch off the lights.

Open the hood (
page 226).

Turn headlamp cover2 to the left and
remove.
iIf the inside of the headlamps is fogged
up, switch the lights on for a sufficient
amount of time.
Warning!
G
Do not remove the cover3 for the Bi-Xenon
headlamp. Because of high voltage in Bi-Xe-
non lamps, it is dangerous to replace the
bulb or repair the lamp and its components.
We recommend that you have such work
done by a qualified technician.


284 Practical hintsReplacing bulbs
Turn bulb holder5 with bulb to the left
and pull out.

Pull out bulb from the base (do not pull
on glass tube).

Insert new bulb so that the base fits in
the bulb holder recess and is level.

Place the bulb holder with bulb on the
headlamp mounting and turn bulb hold-
er to the right until it engages.

Replace headlamp cover2 and turn to
the right until it engages.Front turn signal lamp bulb

Switch off the lights.

Open the hood (
page 226).

Turn bulb socket1 to the left and pull
out.

Push bulb into socket, turn to the left
and remove.

Insert new bulb in socket, push in and
turn to the right.

Reinsert bulb socket in lamp and turn
to the right.Parking and standing lamp bulb

Switch off the lights.

Open the hood (
page 226).

Turn headlamp cover2 to the left and
remove.

Pull out the bulb socket6 with the
bulb.

Pull the bulb out of the bulb socket.

Insert a new bulb in the socket.

Reinstall the bulb socket.

Replace headlamp cover2 and turn to
the right until it engages.

287 Practical hints
Replacing wiper blades
Replacing wiper blades
Removing
Fold the wiper arm forward.

Press safety tab down2.

Push wiper blade downward1 and re-
move.Replacing wiper blade insert

Place wiper blade on firm support.

Press down both tabs.

Slide (direction of arrow) the wiper
blade insert out of the retainer claws.

Slide (direction of arrow) the new wiper
blade insert into retainer claws until
tabs are engaged.
Installing
Slide wiper blade onto wiper arm until
it locks in place.
Warning!
G
For safety reasons, remove key from starter
switch before replacing a wiper blade, other-
wise the motor could suddenly turn on and
cause injury.
!Never open the hood when the wiper
arm is folded forward.
Do not allow the wiper arms to contact
the windshield glass without a wiper
blade inserted.
Make certain that the wiper blades are
properly installed. Improperly installed
wiper blades may cause windshield
damage.
For your convenience, we recommend
that you have this work carried out by
an authorized Mercedes-Benz Center.

295 Practical hints
Battery
Disconnecting the battery
Turn off all electrical consumers.

Open the hood (
page 226).

Remove the filter box.

Disconnect the battery negative lead.

Remove the cover from the positive ter-
minal.

Disconnect the battery positive lead.
Removing the batteries
Remove the screw-nuts securing the
battery.

Remove the battery bracket.

Take out the battery.
Charging and reinstalling batteries
Charge battery in accordance with the
instructions of the battery charger
manufacturer.

Reinstall the charged battery. Follow
the previously described steps in re-
verse order.
Reconnecting the batteries
Turn off all electrical consumers.

Connect the positive lead and fasten its
cover.

Connect the negative lead.

Reinstall the filter box.
Warning!
G
With a disconnected battery

y o u w i l l n o l o n g e r b e a b l e t o t u r n t h e k e y
in the starter switch


the selector lever will remain locked in
positionP
Warning!
G
Never charge a battery while still installed in
the vehicle. Gases may escape during charg-
ing and cause explosions that may result in
paint damage, corrosion or personal injury.
!NEVER invert the terminal connections!!The battery, its filler caps and the vent
tube must always be securely installed
when the vehicle is in operation.

339 Index
Electronic Stability Program
see ESP 23, 75, 328
Emergency call
Telephone 179
Emergency call system* 201
Emergency calls
Initiating an emergency call 204
With Tele Aid* 202
Emergency operation
(Limp Home Mode) 137
Emergency operations
Closing sliding/pop-up roof 278
Locking the vehicle 275
Opening sliding/pop-up roof 278
Remote door unlock 208
Unlocking the vehicle 274
Emergency release
Trunk lid 86
Emergency tensioning device
see ETD 64, 328
Emission control 223
Emission control label 308
Ending
A call (telephone) 128
Engine
Compartment 226Message in display 250
Starting with automatic transmission
45
Starting with manual transmission 44
Starting with the key 45
Technical data 310
Turning off with the key 52
Engine cleaning 242
Engine compartment 226
Fuse box in 303
Hood 226
Engine malfunction indicator lamp 23, 250
Engine number 328
Engine oil 227, 319
Adding 228
Additives 319
Checking level 227
Consumption 227
Display messages 262
Filler neck 228
Messages in display 229, 262
Viscosity 328
Engine oil level see Oil level 225
ESP 23, 75, 328
Messages in display 260
Switching off 76Switching on 77
Warning lamp 246
ETD 328
Safety guidelines 60
ETD (Emergency tensioning device) 64
Exterior lamp switch 96
Exterior lamps
Delayed shut-off 120
Exterior rear view mirror
Activating parking position 140
Exterior rear view mirrors
Adjusting 40
Parking position for 124
F
Fahrenheit
Setting temperature units 117
Fastening the seat belts 41
Fine adjustment
Cruise control 191
First aid kit 271
Flat tire 288
Inflating the spare tire 292
Lowering the vehicle 291
Mounting the spare wheel 288
Preparing the vehicle 288
Spare wheel 271