cooling MERCEDES-BENZ CLK500 CABRIOLET 2004 A209 Owner's Manual

Contents
Control system .................................. 129
Multifunction display .................... 129
Multifunction steering wheel ........ 130
Menus .......................................... 132
Standard display menu ................ 134
AUDIO menu ................................ 134
NAV menu .................................... 137
Distronic* menu........................... 137
Malfunction memory menu .......... 138
Settings menu .............................. 139
Trip computer menu..................... 152
TEL menu* ................................... 154
Automatic transmission ..................... 157
One-touch gearshifting................. 158
Gear ranges ................................. 159
Gear selector lever position ......... 160
Steering wheel gearshift control
(Speedshift) CLK 55 AMG ............ 161
Program mode selector switch..... 163
Accelerator position ..................... 163
Manual shift program
CLK 55 AMG ................................ 164
Emergency operation
(Limp Home Mode) ...................... 166Good visibility ..................................... 167
Windshield wipers ......................... 167
Headlamp cleaning system* ......... 167
Rear view mirror ........................... 168
Sun visors ..................................... 170
Rear window defroster .................. 171
Automatic climate control .................. 172
Setting the temperature................ 175
Adjusting air distribution............... 176
Adjusting air volume ..................... 177
Maximum cooling MAXCOOL ........ 177
Defrosting ..................................... 177
Air recirculation mode .................. 178
Charcoal filter ............................... 179
Deactivating the
climate control system ................. 180
Air conditioning............................. 181
Residual heat and ventilation* ...... 181
Rear passenger compartment
adjustable air vents....................... 182Audio system...................................... 183
Audio and telephone, operation .... 183
Operating safety ........................... 183
Sound system ............................... 183
Operating and display elements ... 184
Button and soft key operation ...... 186
Operation...................................... 186
Radio operation ............................ 189
Satellite radio (SAT)* (USA only)... 192
Cassette operation ....................... 196
CD changer* operation ................. 199
Telephone* operation ................... 203
Power windows .................................. 210
Opening and
closing the windows ..................... 210
Synchronizing power windows ...... 214
Soft top .............................................. 215
Opening and closing the soft top .. 215
Driving systems .................................. 226
Cruise control ............................... 226
Distronic* ..................................... 229
Parktronic (Parking assist)* .......... 241

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

An ignition cable may be damaged.


The engine electronics may not be op-
erating properly.


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

Give very little gas.

Have the problem repaired by an au-
thorized 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 292).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 de-
termined:

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.

173 Controls in detail
Automatic climate control
Automatic climate control panel
Item
1
Left side air vent, adjustable
2
Left center air vent, adjustable
3
Thumbwheel for air volume control
for center air vents
4
Right center air vent, adjustable
5
Right side air vent, adjustable
6
Automatic climate control panel
7
Thumbwheel for air volume control
for right side center air vent
8
Thumbwheel for lowering tempera-
ture, center and side air vents
9
Thumbwheel for air volume control
for left side center air ventiFor draft-free ventilation, move the slid-
ers for the center air vents1, 2, 4,
5 to the middle position.
Item
1
Temperature control, left, lowering
2
Temperature control, left, raising
3
Left-side air distribution
(automatic or manual operation)
4
Activated charcoal filter
5
Display
6
Right-side air distribution
(automatic or manual operation)
7
Temperature control, right, raising
8
Temperature control, right,
lowering
9
Rear window defroster
a
AC cooling on/off °Residual heat/ventilation
b
Air volume control
c
Automatic climate control on/off
(complete system)
d
Air recirculation
e
Defrosting

174 Controls in detailAutomatic climate controlThe automatic climate control is operation-
al whenever the engine is running. You can
operate the climate control system in ei-
ther the automatic or manual mode. The
system cools or heats the interior depend-
ing on the selected interior temperature
and the current outside temperature.Nearly all dust particles, pollutants and
odors are filtered out before outside air en-
ters the passenger compartment through
the air distribution system.
The air conditioning will not engage (no
cooling) if the ° mode is selected
(
page 181).
Warning
G
When operating the automatic climate con-
trol, the air that enters the passenger com-
partment through the air vents in the
footwell can be very hot or very cold (de-
pending on the set temperature). This may
cause burns or frostbite on unprotected skin
in the immediate area of the air vents. Al-
ways keep sufficient distance between un-
protected parts of the body and the footwell
air vents. If necessary change the air flow
using the air distribution controls to direct
the air away from the footwell air vents
(page 176).
Warning!
G
Follow the recommended settings for heat-
ing and cooling given on the following pag-
es. Otherwise the windows could fog up,
impairing visibility and endangering you and
others.
iSevere conditions (e.g. strong air pollu-
tion) may require replacement of the fil-
ter before its scheduled interval. A
clogged filter will reduce the air volume
to the interior.
If the vehicle interior is hot, ventilate
the interior before driving off.
Keep the air intake grille in front of the
windshield free of snow and debris.
Do not obstruct air flow by placing ob-
jects on the air flow-through exhaust
slots below the rear window.

177 Controls in detail
Automatic climate control
Adjusting air volume
Adjusting manually
Seven blower speeds are available.
Press leftM or rightQ s i d e o f a i r
volume control switch until the re-
quested blower speed is attained.
The display “AUTO” disappears and the
automatic mode is switched off. The
selected blower speed is shown in the
display.
Adjusting automatically

Press left or right U button until it
clicks in.
The a, Z, X and Y sym-
bols are no longer visible.
The air volume is adjusted automatical-
ly.
Maximum cooling MAXCOOL
If the left and right air distribution controls
as well as the airflow volume control are
set toU and there is a high need for
cooling, the display “MAXCOOL” appears.
This provides the fastest possible cooling
of the vehicle interior (when windows and
soft top are closed).
Defrosting
Activating
Press buttonP (
page 173).
The indicator lamp on the button
comes on.
Switch off air recirculation, if selected.

Press button, (
page 173).
The indicator lamp on the button goes
out.

Close center air vents.

Adjust side air vents upwards.
Deactivating

Press buttonP (
page 173).
The indicator lamp on the button goes
out. Defrosting is turned off.
iThese settings should only be selected
for a short time.

181 Controls in detail
Automatic climate control
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° (
page 173).
The indicator lamp on the button°
comes on.Activating
Moist air can fog up the windows. You can
dehumidify the air with the air condition-
ing.

Press° again (
page 173).
The indicator lamp on the button°
goes out.
The air conditioning system uses the refrig-
erant R134a. This refrigerant is free of
CFCs which are harmful to the ozone layer.
Residual heat and ventilation*
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
Turn the SmartKey in the starter switch
to position1 or0, or remove it from
the starter switch.

Press button° (
page 173).
The indicator lamp on button°
comes on.
iCondensation may drip out from under-
neath the vehicle. This is normal and
not an indication of a malfunction.
!If the° button on the automatic cli-
mate control panel starts to flash, this
indicates that the air conditioning sys-
tem is losing refrigerant. The compres-
sor has turned itself off. The air
conditioning cannot be turned on
again.
Have the air conditioning system
checked at the nearest authorized
Mercedes-Benz Center.

292 OperationEngine compartmentCoolant
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.
The coolant expansion tank is located on
the passenger side of the engine compart-
ment.
1Coolant expansion tank

Using a rag, turn the cap slowly approx-
imately one half turn to the left to re-
lease any excess pressure.

Continue turning the cap to the left and
remove it.
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 gauge indi-
cates that the coolant is overheated.


Do not remove pressure cap on coolant
reservoir if engine temperature is above
194°F (90°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 approx-
imately
1⁄2 turn to relieve excess pres-
sure. If opened immediately, scalding
hot fluid and steam will be blown out un-
der pressure.


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

315 Practical hints
What to do if …?
Problem
Possible cause
Suggested solution
•
The red coolant warning lamp
comes on when the engine is
running.
There is insufficient coolant in the reservoir.

Add coolant to prevent engine from
overheating (
page 292).
If this warning lamp comes on frequently,
there is a leak in the cooling system.

Have the cooling system checked.
If the coolant level is correct, the electric ra-
diator fan may be broken.

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.
•
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.
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 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.

328 Practical hintsWhat to do if …?Display symbol
Display message
Possible cause
Possible solution
?
Visit workshop!
There may be a malfunction in the

fuel injection system


ignition system


exhaust system


fuel system

Have the measuring system checked
by an authorized Mercedes-Benz Cen-
ter.
B
Coolant
Check level
The coolant level is too low.

Add coolant (
page 292).

If you have to add coolant frequently,
have the cooling system checked by
an authorized Mercedes-Benz Center.
Warning!
G
Do not spill antifreeze on hot engine parts.
Antifreeze contains ethylene glycol which
may burn if it comes into contact with hot
engine parts. You can be seriously burned.
!Do not ignore the low engine coolant
level warning. Extended driving with
the message and symbol displayed
may cause serious engine damage not
covered by the Mercedes-Benz Limited
Warranty.
Do not drive without sufficient amount
of coolant in the cooling system. The
engine will overheat, causing major en-
gine damage.

330 Practical hintsWhat to do if …?Display symbol
Display message
Possible cause
Possible solution
Ï
Coolant
Stop, engine off!
The poly-V-belt could be broken.

Stop immediately and check the
poly-V-belt.
If it is broken:

Do not continue to drive. Otherwise
the engine will overheat due to an in-
operative water pump which may re-
sult in damage to the engine. Notify an
authorized Mercedes-Benz Center.
If it is intact:

Do not continue to drive the vehicle
with this message displayed. Doing so
could result in serious engine damage
that is not covered by the
Mercedes-Benz Limited Warranty.
Coolant
Visit workshop
The cooling fan for the coolant is malfunc-
tioning.

Observe the coolant temperature dis-
play.

Have the fan replaced as soon as pos-
sible.