2003 MERCEDES-BENZ S500 4MATIC open hood

268 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 automatic transmission.Active Body Control* (ABC*) fluid level
Regular fluid level check is not required. If
you notice fluid leaks or malfunction mes-
sages in the multifunction display, have an
authorized Mercedes-Benz Center check
the ABC-system.
Coolant
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.
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.

305 Practical hints
What to do if …?
During severe operating conditions and
stop-and-go city traffic, the coolant tem-
perature may rise close to 248°F (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.

311 Practical hints
What to do if …?
PRE-SAFE
INACTIVE
VISIT WORKSHOP
If BAS or ESP malfunction messages are
displayed simultaneously, PRE-SAFE has
been deactivated as a result of these mal-
functions. All other occupant safety sys-
tems, such as the airbags, are still
available.

Visit an authorized Mercedes-Benz
Center as soon as possible.
PRE-SAFE itself has failed. All other occu-
pant safety systems, such as the airbags,
are still available.

Visit an authorized Mercedes-Benz
Center as soon as possible.
A
RESERVE FUEL
The fuel level has dropped below the re-
serve mark.

Refuel at the next gas station
(page 261).
Y
HOOD OPEN!
You are driving with the hood open.

Close the hood (
page 264).
I
REMOVE KEY!
You have forgotten to remove the
SmartKey.

Remove the SmartKey from the igni-
tion.
REPLACE KEY!
VISIT WORKSHOP!
The batteries in the SmartKey are dead.

Change the batteries (
page 328).
AUTOM. LIGHT ON
REMOVE KEY!

Remove the SmartKey from the start-
er switch.
Display
Possible cause
Suggested solution

333 Practical hints
Replacing bulbs
Replacing bulbs for front lamps
1Headlamp cover for fog lamp
2Headlamp cover for high beam head-
lamp bulb, parking and standing lamp
3Headlamp cover for low beam
(Bi-Xenon* or halogen) headlamp bulb4Bulb socket for fog lamp
5Bulb socket for parking and standing
lamp
6Electrical connector for high beam
headlamp bulb
7Electrical connector for low beam
headlamp bulb
8Bulb socket for turn signal lampReplacing low beam bulbs
Bi-Xenon* headlamp
Halogen headlamp

Switch off the lights.

Open the hood (
page 263).

Press the tab on cover3 and remove
cover.

Pull connector7 off of the lamp.

Release the retaining springs and take
out the bulb.Warning!
G
Do not remove the cover for the Bi-Xenon
headlamp. Because of high voltage in xenon
lamps, it is dangerous to replace the bulb or
repair the lamp and its components. We rec-
ommend that you have such work done by a
qualified technician.


334 Practical hintsReplacing bulbs
Insert the new bulb in the socket so
that the base is in the recess on the
lower left.

Attach the retaining springs.

Insert connector7 into the bulb.

Press cover3 onto the housing until
the tab engages.Replacing high beam bulbs

Switch off the lights.

Open the hood (
page 263).

Press the tab on cover2 and remove
cover.

Pull connector 6 off of the bulb.

Apply pressure on the bulb contacts
from above until the bulb releases from
the retaining springs.

Remove bulb.

Insert the new bulb in the socket with
the marking facing upward.

Press the bulb upward on the contacts
until it engages in the retaining springs.

Insert connector6 onto the bulb.

Press cover2 onto the housing until
the tab engages.Front turn signal lamp bulb

Switch off the lights.

Open the hood (
page 263).

Twist bulb socket8 counterclockwise
and pull out.

Gently push bulb into socket, turn
counterclockwise and remove.

Insert new bulb in socket, push in and
twist clockwise.

Reinstall bulb socket in lamp and twist
clockwise until it engages.


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

Open the hood (
page 263).

Press the tab on cover2 and remove
cover.

Pull out the bulb socket5 with the
bulb.

Pull the bulb out of the bulb socket.

Insert a new bulb in the socket.

Reinstall the bulb socket.

Press cover2 onto the housing until
the tab engages.Side marker lamp bulb

Switch off the lights.

Carefully slide lamp towards rear.

Remove front end first.

Twist bulb socket counterclockwise
and pull out.

Pull bulb out of the bulb socket.

Insert new bulb in socket.

Reinstall bulb socket, push in and twist
clockwise.

To reinstall lamp, set rear end in
bumper and let front end snap into
place.

338 Practical hintsReplacing wiper bladesInstalling
Slide the wiper blade into the cutout on
the wiper arm.

Slide the tab back in the opposite di-
rection of arrow2 until it audibly en-
gages.

Rotate wiper blade into position paral-
lel to wiper arm.

Fold the wiper arm backward to rest on
the windshield.
!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.

394 IndexEmergency call system* 237
Emergency calls
Initiating an emergency call 240
With Tele Aid* 238
Emergency engine shut-down 355
Emergency operation (Limp Home Mode)
165
Emergency operations
Closing sliding/pop-up roof 330
Locking the vehicle 327
Opening sliding/pop-up roof 330
Remote door unlock 244
Unlocking the trunk lid 327
Unlocking the vehicle 326
Emergency tensioning device see ETD 65,
382
Emission control 259
Ending
A call (telephone) 140
Engine 362
Compartment 263
Message in display 294
Starting 43
Starting with KEYLESS-GO* 43
Starting with the Smartkey 43
Turning off with the Smartkey 52Engine cleaning 284
Engine compartment 263
Fuse box in 354
Hood 263
Engine malfunction indicator lamp 294
Engine number 382
Engine oil 264
Adding 266, 267
Additives 373
Checking level 264
Consumption 264
Display messages 308
Filler neck 267
Messages in display 265, 309
Viscosity 382
Engine oil level see Oil level 262
Engine shut down in an emergency 355
Entry position
Messages in display 321
ESP 78, 382
Four wheel electronic traction system
with ESP 81
Switching off 80
Switching on 80
Warning lamp 290ETD 382
Safety guidelines 60
ETD (Emergency tensioning device) 65
Exterior lamp switch 120
Exterior rear view mirrors
Adjusting 39
Folding electrically 170
Parking position for 158
F
Fahrenheit
Setting temperature units 149
Fastening the seat belts 40
Fine adjustment
Cruise control 198
Distronic* 205
First aid kit 322
Flat tire 339
Lowering the vehicle 342
Mounting the spare wheel 339
Preparing the vehicle 339
Flexible Service System (FSS) 280, 383
Fog lamp, rear 123, 332
Fog lamps
Replacing bulbs 331