tire pressure MERCEDES-BENZ S550 4MATIC 2008 W221 Owner's Manual

Contents
Infrared reflecting windshield ....... 524
Operation......................................... 525
The first 1000 miles (1500 km) ......... 526
Driving instructions ............................ 527
Drive sensibly – save fuel ............. 527
Drinking and driving ..................... 527
Pedals .......................................... 527
Power assistance ......................... 527
Brakes .......................................... 528
Driving off..................................... 530
Parking ......................................... 530
Tires ............................................. 531
Hydroplaning ................................ 531
Tire traction .................................. 532
Tire speed rating .......................... 532
Winter driving instructions ........... 533
Standing water ............................. 534
Passenger compartment .............. 535
Driving abroad .............................. 535
Control and operation of radio
transmitters.................................. 535
Catalytic converter ....................... 536
Emission control........................... 536
Coolant temperature .................... 537At the gas station .............................. 538
Refueling ...................................... 538
Check regularly and before
a long trip ..................................... 540
Engine compartment ......................... 541
Hood ............................................ 541
Engine oil ..................................... 543
Transmission fluid level ................ 546
Active Body Control* (ABC*)
fluid level...................................... 547
Coolant level ................................ 547
Windshield washer system and
headlamp cleaning system ........... 548
Tires and wheels ................................ 550
Important guidelines .................... 550
Tire care and maintenance ........... 551
Direction of rotation ..................... 553
Loading the vehicle ...................... 553
Recommended tire
inflation pressure ......................... 558
Checking tire inflation pressure ... 560
Tire labeling.................................. 567
Load identification ....................... 571
DOT, Tire Identification Number
(TIN) ............................................. 572
Maximum tire load ....................... 573Maximum tire inflation pressure .. 573
Uniform Tire Quality Grading
Standards (U.S. vehicles) ............. 574
Tire ply material ........................... 575
Tire and loading terminology........ 576
Rotating tires ............................... 578
Winter driving .................................... 580
Winter tires .................................. 580
Snow chains................................. 581
Maintenance...................................... 582
Maintenance service indicator
message ...................................... 582
Calling up the maintenance
service indicator display .............. 583
Resetting the maintenance
service indicator .......................... 584
Vehicle care....................................... 585
Cleaning and care of vehicle ........ 585
Practical hints................................. 597
What to do if …? ................................ 598
Lamps in instrument cluster ........ 598
Air bag off indicator lamp............. 610
Vehicle status messages in the
multifunction display.................... 612

25 At a glance
Exterior view
ItemPage
1Trunk

Unlocking

Opening and closing

Minispare wheel

Vehicle tool kit
479
479
686
668
2Rear lamps679
3Rear window, defrosting473
4Fuel filler flap
Gasoline538
729
5Doors

Locking and unlocking

Opening and closing
332
332
ItemPage
6Exterior rear view mirror
Parking position361
364
7Towing the vehicle700
8Rims and tires

Checking tire inflation
pressure

Minispare wheel

Flat tire
718
560
670
686
9Hood, opening
Engine oil
Coolant541
543
547
ItemPage
aHeadlamp cleaning system375
bFront lamps679
cWindshield wipers
Wiper blades, replacing
Wiper blades, cleaning381
684
592
dWindow, cleaning592
eRoofs

Power tilt/sliding sunroof

Panorama roof with power
tilt/sliding panel*
486
489

29 At a glance
Instrument cluster
ItemPage
1Coolant temperature gauge417
2Fuel gauge with:
Fuel tank reserve warning
lamp
AHigh beam headlamp
indicator lamp
-ABS indicator lamp
=SRS indicator lamp
605
375
598
607
3Parktronic*/Park Assist*
warning indicator for left
front area 446,
451
4Multifunction display with:
Speedometer
0
USA only
!
Canada onlyElectronic
parking brake
warning or indi-
cator lamps600
ItemPage
;
USA only
3
Canada onlyBrake warning
lamp599
HCombination low tire
pressure/TPMS mal-
function telltale, USA
only
Low tire pressure*
telltale, Canada only608
LLeft turn signal
indicator lamp393
KRight turn signal
indicator lamp393
vESP® warning lamp604
lDistance warning
lamp*178,
427,
604
1Vehicles without DISTRONIC Plus*: Warning lamp
without function. It illuminates when the ignition is
on. It should go out when the engine is running.
ItemPage
5Parktronic*/Park Assist*
warning indicator for right
front area 446,
451
6Gear position/range
indicator 408
7Tachometer with:
±Engine malfunction
indicator lamp602
8Selected program mode indi-
cator 410
9Main menu for control sys-
tem, multifunction display264
aOutside temperature 418
bDisplay with:
Additional speedometer282
:PRE-SAFE® Brake*
indicator279

66 Safety and Security
Driving safety systems
This section contains information about
Adaptive Brake Lights as well as the follow-
ing driving safety systems:

ABS (Antilock Brake System)

Adaptive Brake

BAS (Brake Assist System)

BAS Plus* (Brake Assist System Plus)

EBP (Electronic Brake Proportioning)

ESP® (Electronic Stability Program)

4MATIC (Four Wheel Electronic
Traction System)

PRE-SAFE® Brake* (Preventive Occu-
pant Safe
ty Brake)
ABS
The Antilock Brake System (ABS) regulates
the brake pressure so that the wheels do
not lock during braking. This allows you to
maintain the ability to steer your vehicle.
The ABS is functional above a speed of ap-
proximately 5 mph (8 km/h) independent
of road surface conditions.
On slippery road surfaces, the ABS will re-
spond even to light brake pressure.
The - indicator lamp in the instrument
cluster (
page 28) comes on when you
switch on the ignition (
page 344). It goes
out when the engine is running.
Warning!G
The following factors increase the risk of ac-
cidents:

Excessive speed, especially in turns

Wet and slippery road surfaces

Following another vehicle too closely
The driving safety systems described in this
section cannot reduce these risks or pre-
vent the natural laws of physics from acting
on the vehicle.
Always adapt your driving style to the pre-
vailing road and weather conditions and
keep a safe distance to other road users and
objects on the street.
iIn winter operation, the maximum effective-
ness of the ABS, Adaptive Brake, BAS,
BAS Plus*, EBP, ESP
® and 4MATIC is only
achieved with winter tires (
page 580), or snow
chains as required.
Warning!G
Do not pump the brake pedal. Use firm,
steady brake pedal pressure instead. Pump-
ing the brake pedal defeats the purpose of
the ABS and significantly reduces braking
effectiveness.

67 Safety and Security
Driving safety systems
Braking
At the instant one of the wheels is about to
lock up, a slight pulsation can be felt in the
brake pedal, indicating that the ABS is in
the regulating mode.
Keep firm and steady pressure on the
brake pedal while experiencing the pul-
sation.
Continuous, steady brake pedal pressure
yields the advantages provided by the ABS,
namely braking power and the ability to
steer the vehicle.
The pulsating brake pedal can be an indica-
tion of hazardous road conditions and
functions as a reminder to take extra care
while driving.
Emergency brake maneuver
Keep continuous full pressure on the
brake pedal.For more information, see “Practical hints”
(
page 598).
Adaptive Brake
Adaptive Brake provides a high level of
braking safety as well as increased braking
comfort. It is coupled with ABS, ESP
® and
BAS. Adaptive Brake takes driver and vehi-
cle characteristics into consideration, thus
achieving an optimal braking effect.
Warning!G
When the ABS is malfunctioning, the BAS,
BAS Plus* and ESP® are also switched off.
When the ABS is malfunctioning, the wheels
may lock during hard braking, reducing
steering capability and extending the brak-
ing distance.
Warning!G
The ABS cannot prevent the natural laws of
physics from acting on the vehicle, nor can
it increase braking or steering efficiency
beyond that afforded by the condition of the
vehicle brakes and tires or the traction
afforded. The ABS cannot prevent acci-
dents, including those resulting from exces-
sive speed in turns, following another
vehicle too closely, or hydroplaning.
Only a safe, attentive, and skillful driver can
prevent accidents.
The capabilities of an ABS equipped vehicle
must never be exploited in a reckless or dan-
gerous manner which could jeopardize the
user’s safety or the safety of others.

68 Safety and Security
Driving safety systems
Adaptive Brake Lights
(S 600/S 65 AMG and USA only)
The brake lamps flash in quick intervals
while you are braking in order to signal to
cars behind you that

you are braking strongly at a speed of
more than 30 mph (50 km/h)

you are braking with the aid of BAS or
BAS Plus*
If you bring the car to a complete stop by
hard braking at a speed of more than
40 mph (70 km/h), the hazard warning
flasher automatically comes on as soon as
the vehicle is at a standstill. While the vehi-
cle is stationary, the brake lamps are con-
tinuously lit up.
Once you drive faster than 6 mph
(10 km/h) afterward, the hazard warning
flasher goes out.
BAS
The Brake Assist System (BAS) operates in
emergency situations. If you apply the
brakes very quickly, the BAS automatically
provides full brake boost, thereby poten-
tially reducing the braking distance.
Apply continuous full braking pressure
until the emergency braking situation is
over.
The ABS will prevent the wheels from
locking.
When you release the brake pedal, the
brakes function again as normal. The BAS
is then deactivated.
For more information, see “Practical hints”
section (
page 598).
Warning!G
When the BAS is malfunctioning, the brake
system is still functioning normally, but with-
out the additional brake boost available that
BAS would normally provide in an emergen-
cy braking maneuver. Therefore, the braking
distance may increase.
Warning!G
The BAS cannot prevent the natural laws of
physics from acting on the vehicle, nor can
it increase braking efficiency beyond that af-
forded by the condition of the vehicle brakes
and tires or the traction afforded. The BAS
cannot prevent accidents, including those
resulting from excessive speed in turns, fol-
lowing another vehicle too closely, or hydro-
planing. Only a safe, attentive, and skillful
driver can prevent accidents.
The capabilities of a BAS equipped vehicle
must never be exploited in a reckless or dan-
gerous manner which could jeopardize the
user’s safety or the safety of others.

280 Control systems
Instrument cluster control system
Press % or $ to select the
“Rearview camera” function.
Press #.
Press # again if you would like to
change the current status.
The following settings are available:
Service menu
The “Service” menu is used for

calling up messages

checking tire inflation pressure elec-
tronically with the Advanced TPMS*
(standard on U.S. vehicles)

activating Run Flat Indicator
(Canada only)

calling up the maintenance service in-
dicator display

check engine oil level*
Calling up vehicle malfunction, warning
and system status messages stored in
memory
Use the vehicle status message memory
menu to scan malfunction and warning
messages that may be stored in the sys-
tem. Such messages appear in the multi-function display and are based on
conditions or system status the vehicle’s
system has recorded.
The vehicle status message memory menu
only appears if there are any messages
stored.
Press ( or & to select the
“Service” menu.
“On when in
Reverse”The Dynamic Rear View
Monitor automatically
switches on when reverse
gear is engaged.
“OFF”The Dynamic Rear View
Monitor is not switched on.
iThe menu overview can be found on
(
page 266).
Warning!G
Malfunction and warning messages are only
indicated for certain systems and are inten-
tionally not very detailed. The malfunction
and warning messages are simply a remind-
er with respect to the operation of certain
systems and do not replace the owner’s
and/or driver’s responsibility to maintain
the vehicle’s operating safety by having all
required maintenance and safety checks
performed on the vehicle and by bringing
the vehicle to an authorized Mercedes-Benz
Center to address the malfunction and
warning messages (
page 612).


281 Control systems
Instrument cluster control system
If conditions have occurred causing
status messages to be recorded, the
number of messages appears in the
multifunction display: “2 Messages”.
Press % or $ to select the mes-
sage.
Press # to confirm.
Checking tire inflation pressure
For information about checking tire infla-
tion pressure (
page 561).
Activating Run Flat Indicator
(Canada only)
For information about activating Run Flat
Indicator (
page 565).Calling up the maintenance service in-
dicator display
For information about calling up the main-
tenance service indicator display
(
page 582).
Checking engine oil level (S 600 and
S65AMG)
For information about checking engine oil
level (
page 543).
Settings menu
In the “Settings” menu, you can:

switch the daytime running lamps on or
off (USA only)

switch the additional speedometer on
or off

switch the radar sensors* on or off
(USA only)Setting daytime running lamp mode
(USA only)
Press ( or & to select the “Set-
tings” menu.
Press % or $ to select the “Day-
time driving lamps” function.
Press #.
Press # again if you would like to
change the current status.
Depending on the previous status, the
daytime running lamps will be switched
on or off.
iSee the “Practical hints” section for mal-
function and warning messages (
page 612).
iIf you turn the SmartKey in the starter
switch to position0 and then back to position2,
all messages will be deleted from the message
memory.
iThe menu overview can be found on
(
page 266).
iThis function is not available in countries
where the daytime running lamp mode is manda-
tory and therefore in a constant mode.

527 Operation
Driving instructions
Driving instructions
Drive sensibly – save fuel
Fuel consumption, to a great extent,
depends on driving habits and operating
conditions.
To save fuel you should:

Keep tires at the recommended tire
inflation pressures.

Remove unnecessary loads.

Remove roof rack when not in use.

Allow engine to warm up under low
load use.

Avoid frequent acceleration and decel-
eration.

Have all maintenance work performed
at the intervals specified in the Mainte-
nance Booklet and as required by the
Maintenance System. Contact an au-
thorized Mercedes-Benz Center.
Fuel consumption is also increased by driv-
ing in cold weather, in stop-and-go traffic,
on short trips, and in hilly area.
Drinking and drivingPedals
Power assistance
Warning!G
Drinking and driving and/or taking drugs
and driving are very dangerous combina-
tions. Even a small amount of alcohol or
drugs can affect your reflexes, perceptions
and judgment.
The possibility of a serious or even fatal ac-
cident are greatly increased when you drink
or take drugs and drive.
Do not drink or take drugs and drive or allow
anyone to drive who has been drinking or
taking drugs.
Warning!G
Make sure that absolutely no objects are ob-
structing the pedals’ range of movement.
Keep the driver’s footwell clear of all obsta-
cles. If there are any floormats or carpets in
the footwell, make sure the pedals still have
sufficient clearance. Otherwise this could
lead to accidents or injury.
Warning!G
With the engine not running, there is no
power assistance for the brake and steering
systems. In this case, it is important to keep
in mind that a considerably higher degree of
effort is necessary to brake and steer the ve-
hicle.

531 Operation
Driving instructions
Tires
Treadwear indicators (TWI) are required by
law. These indicators are located in six
places on the tread circumference and be-
come visible at a tread depth of approxi-
mately
1/16in (1.6 mm), at which point the
tire is considered worn and should be re-
placed.The treadwear indicator appears as a solid
band across the tread.
Specified tire inflation pressures must be
maintained. This applies particularly if the
tires are subject to extreme operating con-
ditions (e.g. high speeds, heavy loads, high
ambient temperatures).For more information, see “Tires and
wheels” (
page 550).
Hydroplaning
Depending on the depth of the water layer
on the road, hydroplaning may occur, even
at low speeds and with new tires. Reduce
vehicle speed, avoid track grooves in the
road and apply brakes cautiously in the
rain.
Warning!G
If you feel a sudden significant vibration or
ride disturbance, or you suspect that possi-
ble damage to your vehicle has occurred,
you should turn on the hazard warning flash-
ers, carefully slow down, and drive with cau-
tion to an area which is a safe distance from
the road.
Inspect the tires and the vehicle underbody
for possible damage. If the vehicle or tires
appear unsafe, have the vehicle towed to
the nearest Mercedes-Benz Center or tire
dealer for repairs.
Warning!G
Although the applicable federal motor vehi-
cle safety laws consider a tire to be worn
when the treadwear indicators (TWI) be-
come visible at approximately
1/16 in
(1.6 mm), we recommend that you do not al-
low your tires to wear down to that level. As
tread depth approaches
1/8 in (3 mm), the
adhesion properties on a wet road are
sharply reduced.
Depending upon the weather and/or road
surface (conditions), the tire traction varies
widely.
Warning!G
Do not drive with a flat tire. A flat tire affects
the ability to steer or brake the vehicle. You
may lose control of the vehicle. Continued
driving with a flat tire or driving at high
speed with a flat tire will cause excessive
heat build-up and possibly a fire.