cooling MERCEDES-BENZ SL500 2004 R230 Owner's Manual

Contents
Control system .................................. 127
Multifunction display .................... 127
Multifunction steering wheel ........ 128
Menus .......................................... 130
Standard display menu ................ 132
AUDIO menu ................................ 132
NAVI menu ................................... 134
Distronic* menu........................... 135
Malfunction memory menu .......... 136
Settings menu .............................. 137
Trip computer menu..................... 150
TEL menu* ................................... 152
Automatic transmission ..................... 155
One-touch gearshifting................. 156
Gear ranges ................................. 157
Gear selector lever position ......... 158
Steering wheel gearshift control
(Speedshift) SL 55 AMG ............... 160
Program mode selector switch..... 161
Accelerator position ..................... 162
Manual shift program SL 55 AMG 163
Emergency operation
(Limp Home Mode) ...................... 165Good visibility ..................................... 166
Rear view mirrors .......................... 166
Windshield wipers ......................... 168
Headlamp cleaning system ........... 168
Rear window defroster .................. 169
Sun visors ..................................... 169
Automatic climate control .................. 170
Setting the temperature................ 172
Adjusting air volume ..................... 173
Adjusting air distribution............... 174
Maximum cooling MAXCOOL ........ 174
Defrosting ..................................... 175
Air recirculation mode .................. 175
Rear window defroster .................. 177
Residual heat and ventilation ........ 178
Deactivating the automatic
climate control system ................. 179
Air conditioning............................. 179
Ventilated storage compartments. 180
Power windows .................................. 181
Opening and closing the windows. 181
Synchronizing power windows ...... 183Retractable hardtop ........................... 184
Opening and closing the
retractable hardtop ....................... 184
Driving systems .................................. 193
Cruise control ............................... 193
Distronic* ..................................... 196
Active Body Control (ABC) ............ 207
Parktronic* (Parking assist) .......... 210
Useful features ................................... 214
Storage compartments ................. 214
Ashtray ......................................... 219
Cigarette lighter............................ 219
Heated steering wheel*
(SL 500, SL 600)........................... 220
Load assist in the trunk ................ 221
Electrical outlet............................. 222
Telephone* ................................... 222
Tele Aid......................................... 223
Garage door opener ...................... 231

50 Getting startedDrivingThe coolant temperature gauge is
above 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 258).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.

171 Controls in detail
Automatic climate control
Automatic climate control panel
Item
1
Center air vent, adjustable
2
Center air vent, fixed
3
Air temperature controls for cen-
ter and side air vents
4
Air volume control for center and
side air vents
5
Center air vent, adjustable
6
Side defroster vent
7
Side air vent, adjustable
8
Automatic climate control paneliFor draft-free ventilation, move the slid-
ers for the center air vents to the mid-
dle position.
Item
1
Temperature control, left
2
Air distribution, left (automatic or
manual operation)
3
Defrosting
4
Air recirculation
5
Rear window defroster
6
Air distribution, right (automatic or
manual operation)
7
Temperature control, right
8
Automatic climate control on/off
(complete system)
9
Residual heat/ventilation
a
Air volume control (automatic, man-
ual)
b
AC cooling on/off

172 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.
Setting the temperature
Use temperature controls1 and7 to
separately adjust the air temperature on
each side of the passenger compartment.
You should raise or lower the temperature
setting in small increments, preferably
starting at 72°F (22°C).
Increasing
Turn the outer adjustment ring slightly
to the right.
The automatic climate control system
will correspondingly adjust the interior
air temperature.
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 174).
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.iIf 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.
When the retractable hardtop is closed,
do not obstruct air flow by placing ob-
jects on the air flow-through exhaust
slots below the rear window.
iWhen operating the climate control
system in automatic mode, you will
only rarely need to adjust the tempera-
ture, air volume and air distribution.

174 Controls in detailAutomatic climate controlAdjusting air distribution
Use air distribution controls2 and6
(page 171) to separately adjust the air
distribution on each side of the passenger
compartment. The following symbols are
found on the controls:
Adjusting manually

Press the control knob.
The U light on the control knob
goes out. The air distribution can be ad-
justed manually.Adjusting automatically

Press the control knob.
The U light on the control knob
comes on. The air distribution is adjust-
ed automatically.
Windshield fogged on the outside

Switch the windshield wipers on.

Turn the air distribution control to h
or j.
Maximum cooling MAXCOOL
If the left and right air distribution controls
as well as the airflow volume control are
set to U and there is a high need for
cooling, MAXCOOL is activated.
This provides the fastest possible cooling
of the vehicle interior (when retractable
hardtop is closed).
Symbol
Function
h
Directs air through the cen-
ter air vents
j
Directs air to the windows
V
Directs air into the entire
vehicle interior
k
Directs air to the footwells

179 Controls in detail
Automatic climate control
Deactivating the automatic climate control system
Deactivating
It is possible to completely deactivate the
automatic climate control system. 
Press button M (
page 171).
The indicator lamp on button M
comes on.Reactivating
There are several ways to reactivate the
automatic climate control system:

Press any button on the automatic cli-
mate control panel (
page 171).
The indicator lamp on button M
switches off.
or

Turn one of the control knobs on the
automatic climate control.
The indicator lamp on button M
switches off.
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 171).
The indicator lamp on the ±
button comes on.
iThis setting is only recommended when
the retractable hardtop is open.
iCondensation may drip out from under-
neath the vehicle. This is normal and
not an indication of a malfunction.

180 Controls in detailAutomatic climate controlActivating
Moist air can fog up the windows. You can
dehumidify the air with the air condition-
ing.
Press ± again (
page 171).
The indicator lamp on the ± button
goes out.
The air conditioning uses the refrigerant
R134A. This refrigerant is free of CFCs
which are harmful to the ozone layer.
Ventilated storage compartments
The glove box and the armrest storage
compartment have their own air vents that
allow for cooling ventilation when the auto-
matic climate control system is activated.Glove box1Thumbwheel
2Air ventOpening the air vent

Turn thumbwheel1 upwards.
Closing the air vent

Turn thumbwheel1 downwards.
Storage compartment under the armrest1Thumbwheel
2Air vent
Opening the air vent
Turn thumbwheel1 to the right.
Closing the air vent

Turn thumbwheel1 to the left.
!If the ± button on the automatic cli-
mate control panel starts to flash, this
indicates that the air conditioning is
losing refrigerant. The compressor has
turned off. The air conditioning cannot
be turned on again.

Have the air conditioning checked
at the nearest authorized
Mercedes-Benz Center.
iYou should keep these air vents closed
when outside temperatures are low.

258 OperationEngine compartment
Add engine oil as required. Be careful
not to overfill with oil.
Be careful not to spill any oil when adding.
Avoid environmental damage caused by oil
entering the ground or water.

Screw filler cap1 back on filler neck.
For more information on engine oil, see the
“Technical data” section (
page 386) and
(
page 388).
Transmission 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 automatic transmission. Oil level in the ABC system
The oil level in the ABC system does not
need to be checked. If there is visible oil
loss or if malfunction messages appear in
the display, have an authorized
Mercedes-Benz Center check the ABC
system.
Coolant
!Excess oil must be siphoned or drained
off. It could cause damage to the
engine and catalytic converter not
covered by the Mercedes-Benz Limited
Warranty.
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
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 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.


286 Practical hintsWhat to do if …Problem
Possible cause
Suggested solution
D
The red coolant warning lamp
comes on when the engine is
running.
There is insufficient coolant in the reservoir.
If this warning lamp comes on frequently,
there is a leak in the cooling system.
If the coolant level is correct, the electric ra-
diator fan may be broken.

Immediately add coolant to prevent
engine from overheating
(page 258).

Have the cooling system checked.

If the coolant temperature is below
248 °F (120 °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.
D
The red coolant warning lamp
comes on while driving and you
hear a warning sound.
The coolant temperature has exceeded
248 °F (120 °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 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 the
engine has cooled down.

303 Practical hints
What to do if …
Left display
Right display
Possible cause
Possible solution
?
Visit workshop!
There may be a malfunction in the

fuel injection system


ignition system


exhaust system


fuel system

Have the engine checked as soon as possible
by an authorized Mercedes-Benz Center
(page 285).
B
Coolant
Check level!
The coolant level is too low.

Add coolant (
page 258).

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
this message and symbol displayed
may cause serious engine damage not
covered by the Mercedes-Benz Limited
Warranty. Do not drive without suffi-
cient amount of coolant in the cooling
system. The engine will overheat, caus-
ing major engine damage.