engine coolant MERCEDES-BENZ C COUPE 2005 CL203 Owner's Manual

ContentsPanorama roof with power
tilt/sliding panel* .............................. 241
Opening and closing the roller
sunblinds for the panorama roof
with power tilt/sliding panel ........ 241
Opening and closing the panorama
roof with power tilt/sliding panel . 242
Synchronizing the panorama roof
with power tilt/sliding panel and
the roller sunblinds....................... 246
Driving systems ................................. 247
Cruise control............................... 247
Loading .............................................. 250
Roof rack* .................................... 250
Split rear bench seat .................... 250
Luggage cover .............................. 252
Loading instructions ..................... 252
Cargo tie-down rings .................... 253
Useful features .................................. 254
Storage compartments................. 254
Ashtrays ....................................... 257
Cigarette lighter ........................... 259
Electrical outlet ............................ 260
Telephone*................................... 260
Tele Aid* ...................................... 261
Garage door opener* ................... 269
Operation......................................... 275
The first 1000 miles (1500km) .......... 276
Driving instructions............................ 277
Drive sensibly – save fuel ............. 277
Drinking and driving ..................... 277
Pedals .......................................... 277
Power assistance ......................... 277
Brakes .......................................... 278
Driving off .................................... 279
Parking ......................................... 279
Tires ............................................. 280
Hydroplaning ................................ 281
Tire traction.................................. 281
Tire speed rating .......................... 282
Winter driving instructions ........... 283
Standing water ............................. 284
Passenger compartment .............. 284
Driving abroad.............................. 284
Control and operation of radio
transmitter ................................... 284
Catalytic converter ....................... 285
Emission control .......................... 286
Coolant temperature .................... 286At the gas station .............................. 288
Refueling ...................................... 288
Check regularly and before a
long trip ....................................... 290
Engine compartment ......................... 291
Hood ............................................ 291
Engine oil ..................................... 292
Transmission fluid level ................ 296
Coolant level ................................ 296
Battery ......................................... 297
Windshield washer system and
headlamp cleaning system*......... 299
Tires and wheels................................ 300
Important guidelines .................... 300
Tire care and maintenance........... 301
Direction of rotation..................... 303
Loading the vehicle ...................... 303
Recommended tire inflation
pressure ....................................... 309
Checking tire inflation pressure ... 311
Tire labeling ................................. 313
Load identification ....................... 317
DOT, Tire Identification Number
(TIN) ............................................. 318
Maximum tire load ....................... 319
Maximum tire inflation pressure .. 320

ContentsTechnical data.................................. 413
Parts service ...................................... 414
Warranty coverage ............................. 415
Loss of Service and Warranty
Information Booklet...................... 415
Identification labels............................ 416
Layout of poly-V-belt drive ................. 417
C 230 Kompressor ....................... 417
C 320 ........................................... 417
Engine ................................................ 418
Rims and Tires ................................... 419
Same size tires ............................. 420
Mixed size tires ............................ 421
Spare wheel ................................. 422
Electrical system................................ 423
Main Dimensions ............................... 424
Weights .............................................. 425Fuels, coolants, lubricants, etc. ......... 426
Capacities .................................... 426
Engine oils.................................... 428
Engine oil additives ...................... 428
Air conditioning refrigerant .......... 428
Brake fluid .................................... 428
Premium unleaded gasoline ......... 429
Fuel requirements ........................ 429
Gasoline additives ........................ 430
Flexible Fuel Vehicles ................... 431
Coolants....................................... 432
Windshield washer system and
headlamp cleaning system ........... 435
Technical terms............................... 437Index................................................. 443

25 At a glance
Instrument cluster
Item
Page
1
Speedometer with:vElectronic Stability
Program (ESP)
warning lamp
83
343
;Brake warning lamp,
USA only
50
56
341
3Brake warning lamp,
Canada only
50
56
341
BLow beam headlamp
indicator lamp
51
110
2
LLeft turn signal
indicator lamp
52
3
Multifunction display with:Trip odometer
121
Main odometer
123
Gear selector lever position
49
162
Item
Page
Program mode
164
Status indicator
(outside temperature/ digital
speedometer)
121
138
Digital clock
123
139
4
KRight turn signal
indicator lamp
52
5
Tachometer with:-Antilock Brake
System (ABS)
indicator lamp
81
340
<Seat belt telltale
66
344
1Supplemental
restraint system
indicator lamp
60
344
AHigh beam headlamp
indicator lamp
51
114
Item
Page
úEngine malfunction
indicator lamp,
USA only
342
±Engine malfunction
indicator lamp,
Canada only
342
6
Fuel gauge with:Fuel reserve warning lamp
344
4Fuel filler cap location
indicator: The fuel
filler cap is on the rear
right-hand side.
7
Coolant temperature gauge
120
8
Reset button for:

Resetting trip odometer
121


Resetting individual
settings
135


Instrument cluster
illumination
119

55 Getting started
Driving
Problems while driving
The engine runs erratically and misfires

An ignition cable may be damaged.


The engine electronics may not be
operating properly.


Unburned gasoline may have entered
the catalytic converter and damaged it.

Give very little gas.

Have the problem repaired by an
authorized Mercedes-Benz Center as
soon as possible.The coolant temperature is over 248°F
(120°C)
The coolant is too hot and is no longer
cooling the engine.

Stop the vehicle as soon as possible
and turn off the engine. Allow engine
and coolant to cool.

Check the coolant level and add cool-
ant if necessary (
page 296).In case of accident
If the vehicle is leaking gasoline:

Do not start the engine under any cir-
cumstances.

Notify local fire and/or police authori-
ties.
If the extent of the damage cannot be
determined:

Notify an authorized Mercedes-Benz
Center.
If no damage can be determined on the


major assemblies


fuel system


engine mount:

Start the engine in the usual manner.

120 Controls in detailInstrument clusterCoolant temperature gauge
The coolant temperature gauge is on the
left side in the instrument cluster
(page 25).During severe operating conditions, e.g.
stop-and-go traffic, the coolant tempera-
ture may rise close to 248°F (120°C).
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


Driving when your engine is badly
overheated 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 com-
ing from it.
Turn off the engine, get out of the vehicle
and do not stand near the vehicle until the
engine has cooled down.

193 Controls in detail
Automatic climate control*
Activating
Moist air can fog up the windows. You can
dehumidify the air with the air condi-
tioning.
Automatic climate control panel
design A
Press button° (
page 183) again.
The indicator lamp on the button goes
out.
The cooling function is switched on.
Automatic climate control panel
design B

Press button2 (
page 183) again.
The indicator lamp on the button
comes on.
The cooling function is switched on.
The air conditioning uses the refrigerant
R134a. This refrigerant is free of CFCs
which are harmful to the ozone layer.Residual heat and ventilation
(available on automatic climate control
panel design A only)
With the engine switched off, it is possible
to continue to heat or ventilate the interior
for up to 30 minutes. This feature makes
use of the residual heat produced by the
engine.
Activating
Switch off the ignition (
page 58).

Press button° (
page 183).
The indicator lamp on the button
comes on.Deactivating

Press button° (
page 183).
The indicator lamp on the button goes
out.
The residual heat is automatically turned
off:


when the ignition is switched on


after about 30 minutes


if the battery voltage drops
!If the air conditioning cannot be turned
on again, this indicates that the air
conditioning is losing refrigerant. The
compressor has turned itself off.
Have the air conditioning checked at
the nearest authorized Mercedes-Benz
Center.
iHow long the system will provide
heating depends on

the coolant temperature


the temperature set by the operator
The blower will run at speed setting 1
regardless of the air distribution
control setting.

286 OperationDriving instructionsEmission control
Certain systems of the engine serve to
keep the toxic components of the exhaust
gases within permissible limits required by
law.
These systems, of course, will function
properly only when maintained strictly
according to factory specifications. Any
adjustments on the engine should,
therefore, be carried out only by qualified
Mercedes-Benz Center authorized
technicians.
Engine adjustments should not be altered
in any way. Moreover, the specified service
jobs must be carried out regularly
according to Mercedes-Benz servicing
requirements. For details refer to the
Maintenance Booklet.
Coolant temperature
During severe operating conditions and
stop-and-go city traffic, the coolant tem-
perature may rise close to approximately
248°F (120°C).
The engine should not be operated with
the coolant temperature over 248°F
(120°C). Doing so may cause serious
engine damage which is not covered by
the Mercedes-Benz Limited Warranty.
Warning!
G
Inhalation of exhaust gas is hazardous to
your health. All exhaust gas contains carbon
monoxide (CO), and inhaling it can cause un-
consciousness and lead to death.
Do not run the engine in confined areas
(such as a garage) which are not properly
ventilated. If you think that exhaust gas
fumes are entering the vehicle while driving,
have the cause determined and corrected
immediately. If you must drive under these
conditions, drive with at least one window
fully open at all times.

290 OperationAt the gas stationCheck regularly and before a long trip
1Coolant level
2Brake fluid (fuse box cover removed)
3Windshield washer and headlamp
cleaning system*Brake fluid
Remove fuse box cover before checking
brake fluid (
page 410).
Engine oil level
For more information on engine oil, see
“Engine oil” (page 292).
Opening hood, see (
page 291).Coolant
For normal replenishing, use water (pota-
ble water quality). For more information on
coolant, see “Coolant level” (
page 296)
Vehicle lighting
Check function and cleanliness. For infor-
mation on replacing light bulbs, see “Re-
placing bulbs” (
page 384).
Exterior lamp switch, see (
page 110).
Tire inflation pressure
For information on tire inflation pressure,
see “Checking tire inflation pressure”
(
page 311).
Windshield washer and headlamp
cleaning system*
For more information on filling up the
washer reservoir, see “Windshield washer
system and headlamp cleaning system*”
(page 299).
!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 immediately. Noti-
fy an authorized Mercedes-Benz Center
immediately. Do not add brake fluid as
this will not solve the problem. For
more information, see “Practical Hints”
(page 341).

292 OperationEngine compartment
Closing the hood
Let the hood drop from a height of
approximately 1 ft (30 cm).
The hood will lock audibly.

Check to make sure the hood is fully
closed.
If you can raise the hood at a point
above the headlamps, then it is not
properly closed. Open it again and let it
drop with somewhat greater force.
Engine oil
The amount of oil your engine needs will
depend on a number of factors, including
driving style. Higher oil consumption can
occur when

the vehicle is new


the vehicle is driven frequently at
higher engine speeds
Engine oil consumption checks should only
be made after the vehicle break-in period.
Warning!
G
If you see flames or smoke coming from the
engine compartment, or if the coolant tem-
perature display indicates that the engine is
overheated, do not open the hood. Move
away from vehicle and do not open the hood
until the engine has cooled. If necessary,
call the fire department.Warning!
G
The engine is equipped with a transistorized
ignition system. Because of the high voltage
it is dangerous to touch any components
(ignition coils, spark plug sockets, diagnos-
tic socket) of the ignition system

with the engine running


while starting the engine


if ignition is “on” and the engine is
turned manually
Warning!
G
Be careful that you do not close the hood on
anyone.
iDo not use any special lubricant addi-
tives, as these may damage the drive
assemblies. Using special additives not
approved by Mercedes-Benz may
cause damage not covered by the
Mercedes-Benz Limited Warranty.
More information on this subject is
available at any Mercedes-Benz
Center.


296 OperationEngine compartmentTransmission fluid level
The transmission fluid level does not need
to be checked. If you notice transmission
fluid loss or gear shifting malfunctions,
have an authorized Mercedes-Benz Center
check the transmission.
Coolant level
The engine coolant is a mixture of water
and anticorrosion/antifreeze. To check
the coolant level, the vehicle must be
parked on level ground and the engine
must be cool.
For more information on coolant, see
“Coolants” (
page 432).
Warning!
G
In order to avoid any possibly serious burns:

Use extreme caution when opening the
hood if there are any signs of steam or
coolant leaking from the cooling system,
or if the coolant temperature display
indicates that the coolant is overheated.


Do not remove pressure cap on coolant
reservoir if coolant temperature is
above 158°F (70°C). Allow engine to
cool down before removing cap. The
coolant reservoir contains hot fluid and
is under pressure.


Using a rag, slowly open the cap
approximately
1/2 turn to relieve ex-
cess pressure. If opened immediately,
scalding hot fluid and steam will be
blown out under pressure.


Do not spill antifreeze on hot engine
parts. Antifreeze contains ethylene gly-
col which may ignite and burn if it comes
into contact with hot engine parts.