power steering MERCEDES-BENZ S-Class 2008 W221 Comand Manual

Contents
Multicontour seats*, rear ............. 383
Easy-entry/exit feature ................ 384
Steering wheel ................................... 386
Steering wheel adjustment........... 386
Heated steering wheel* ............... 387
Mirrors ............................................... 388
Interior rear view mirror ............... 388
Exterior rear view mirrors ............. 388
Power folding exterior rear
view mirrors ................................. 389
Auto-dimming rear view mirrors ... 390
Activating exterior rear
view mirror parking position ......... 391
Memory function................................ 392
Storing positions into memory ..... 393
Recalling positions from memory . 393
Storing exterior rear view
mirror parking position ................. 394
Fastening the seat belts..................... 395
Proper use of seat belts ............... 397
Seat belt height adjustment
automatically ................................ 397
Seat belt height adjustment
manually ....................................... 398
Lighting .............................................. 399
Exterior lamp switch ..................... 399High beam .................................... 403
Headlamp cleaning system .......... 403
Corner-illuminating lamps ............ 404
Hazard warning flasher ................ 405
Interior lighting............................. 406
Door entry lamps ......................... 407
Trunk lamp ................................... 407
Windshield wipers .............................. 408
Switching on/off
windshield wipers......................... 408
Intermittent wiping....................... 409
Single wipe................................... 409
Wiping with windshield
washer fluid.................................. 409
Power windows .................................. 410
Opening and closing
power windows ............................ 410
Rear side window sunshades* ..... 412
Summer opening feature.............. 412
Convenience closing feature ........ 413
Driving and parking............................ 416
Starting the engine....................... 416
Driving off .................................... 419
Turn signals .................................. 420
Problems while driving ................. 420
Parking ......................................... 421Turning off the engine .................. 424
Releasing seat belts ..................... 425
Automatic transmission ..................... 426
Gear selector lever....................... 426
Shifting procedure ....................... 429
Transmission positions ................ 430
Driving tips................................... 433
Gear ranges ................................. 435
Automatic shift program .............. 436
Steering wheel gearshift control .. 438
Manual shift program
(S 63 AMG and S 65 AMG only) ... 440
Emergency operation
(Limp-Home Mode) ...................... 443
Instrument cluster ............................. 444
Adjusting instrument cluster
display illumination ...................... 444
Coolant temperature gauge ......... 444
Tachometer .................................. 445
Outside temperature indicator ..... 445
Fuel gauge ................................... 445
Driving systems ................................. 446
Cruise control .............................. 446
DISTRONIC Plus* ......................... 451
Airmatic ....................................... 468
Active Body Control (ABC)* ......... 470

58 Safety and SecurityOccupant safetyPRE-SAFE
® takes action in the following in-
stances:


Emergency braking situations, e.g.
when BAS (
page 69) is activated or
when BAS Plus* (
page 70) is strongly
intervening.


Critical dynamic driving situations, e.g.
when the vehicle is understeering or
oversteering because it has exceeded
its physical limitations.


Evasive steering maneuvers at speeds
above 20 mph (30 km/h).
When you are driving faster than 20 mph
(30 km/h), PRE-SAFE
® takes the following
measures in such situations:


The front seat belts are pre-tensioned
electrically.


If the OCS senses that the front pas-
senger seat is occupied and the seat is
in an unfavorable position, it will be
adjusted to a better position.


If the vehicle is equipped with power
adjustable rear seats* and the passen-
ger outer seats are in an unfavorable
position, they will be adjusted to a bet-
ter position.


The system increases the air pressure
in the air pockets (on the sides of the
seat cushion and backrest) of the mul-
ticontour* and/or drive-dynamic front
seats*.


If the vehicle is understeering or over-
steering, the tilt/sliding sunroof and
the door windows also close until only
a small gap remains.
Once the hazardous situation is over with-
out an accident occurring, PRE-SAFE
®
loosens the seat belt pre-tension and de-
creases the air pressure in the air pockets
of the multicontour and drive-dynamic
seats*. You can readjust all of the settings
made by PRE-SAFE
®.If the seat belts do not release:

Adjust the backrest or seat slightly to
the rear until the seat belt tension is di-
minished.
The locking mechanism releases.
Children in the vehicle
If an infant or child is traveling with you in
the vehicle:
Secure the child using an infant or child
restraint appropriate to the age and
size of the child.

Make sure the infant or child is
properly secured at all times while the
vehicle is in motion.
i
If the closing procedure of the tilt/sliding
sunroof or power windows is blocked, the
tilt/sliding sunroof or power windows will stop
and open slightly.
!
When moving the seat, make sure there are
no items in the footwell or behind the seats. Oth-
erwise you could damage the seats.

68 Safety and SecurityDriving safety systemsBraking
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 628).
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.

357 Controls in detail
Locking and unlocking
Starter switch positions
Seats
Steering wheel
Mirrors
Memory function
Fastening the seat belts
Lighting
Windshield wipers
Power windows
Driving and parkingAutomatic transmission
Instrument cluster
Driving systems
Air vents
Automatic climate control
Trunk
Power tilt/sliding sunroof
Panorama roof with power
tilt/sliding panel*
Loading and storing
Useful features

374 Controls in detailSeats
You can adjust the lumbar support, multi-
contour seats* for driver and front passen-
ger, as well as drive-dynamic multicontour
seats* using COMAND (
page 282).
Front power seat adjustment
Example driver’s door1Head restraint height (
page 379)
2Seat height
3Seat cushion tilt
4Seat cushion depth
5Seat fore and aft
6Seat backrest tilt

Seat height: Press the switch up or
down in the direction of arrow2.

Seat cushion tilt: Press the switch up
or down in the direction of
arrow3until your upper legs are
lightly supported.

Seat cushion depth: Press the switch
forward or backward in the direction of
arrow4 until your legs are supported
comfortably.
Warning!
G
According to accident statistics, children
are safer when properly restrained in the
rear seating positions than in the front seat-
ing position. Thus, we strongly recommend
that children be placed in the rear seats
whenever possible. Regardless of seating
position, children 12 years old and under
must be seated and properly secured in an
appropriately sized infant restraint, toddler
restraint, or booster seat recommended for
the size and weight of the child. For addi-
tional information, see “Children in the vehi-
cle” (
page 58).
A child’s risk of serious or fatal injuries is
significantly increased if the child restraints
are not properly secured in the vehicle and
the child is not properly secured in the child
restraint.
i
If PRE-SAFE
® has been activated, the front
passenger’s seat and/or electrically adjustable
rear seats* will be moved to a more favorable
seat position.
i
The memory function (
page 392) lets you
store the settings for the seat positions together
with the settings for the steering wheel and the
exterior rear view mirrors.
!
When moving the seats, make sure there are
no items in the footwell or behind the seats; oth-
erwise, you could damage the seats.

387 Controls in detail
Steering wheel
Heated steering wheel*
The steering wheel heating warms up the
leather area of the steering wheel.
1Switching on
2Switching off
3Indicator lamp
Switch on the ignition (
page 370).

Switching on: Turn switch at the tip of
stalk in the direction of arrow1.
The steering wheel is heated. Indicator
lamp3 comes on.

Switching off: T u r n s w i t c h a t t h e t i p o f
stalk in the direction of arrow2.
The steering wheel heating is turned
off. Indicator lamp3 goes out.
i
The steering wheel heating will not switch
on, when the temperature of the vehicle interior
is above 86°F (30°C).
i
Indicator lamp3 flashes or goes out


in case of power surge or undervoltage


in case of a steering wheel heating malfunc-
tion
i
The steering wheel heating switches off au-
tomatically:


when you remove the SmartKey from the
starter switch


on vehicles with KEYLESS-GO*, when you
switch off the ignition (
page 370) and
open the driver’s door


when the temperature of the vehicle interior
is above 86°F (30°C)


after approximately 24 minutes

392 Controls in detailMemory functionPrior to operating the vehicle, the driver
should check and adjust the seat height,
seat position fore and aft, and seat back-
rest angle if necessary, to ensure adequate
control, reach, and comfort. The head re-
straint should also be adjusted for proper
height. See also the section on air bags
(page 42) for proper seat positioning.
In addition, adjust the steering wheel to
ensure adequate control, reach, operation
and comfort. Both the interior and exterior
rear view mirrors should be adjusted for
adequate rear vision.
Fasten seat belts. Infants and small chil-
dren should be seated in a properly se-
cured restraint system that complies with
U.S. Federal Motor Vehicle Safety
Standards 213 and 225 and Canadian
Motor Vehicle Safety Standards 213 and
210.2.With the memory function you can store up
to three different configurations.
Each stored position on the driver’s side
includes the following settings:


Driver’s seat: head restraint height,
seat and backrest position, backrest
curvature in lumbar area


Multicontour seat*: sides of backrest,
backrest curvature in lumbar and
shoulder area


Drive-dynamic multicontour seat*:
activation/deactivation


Steering wheel position


Exterior rear view mirrors positionWarning!
G
Do not activate the memory function while
driving. Activating the memory function
while driving could cause the driver to lose
control of the vehicle.
Warning!
G
When leaving the vehicle, always remove the
SmartKey or SmartKey with KEYLESS-GO*
from the starter switch, take it with you, and
lock the vehicle.
Even with the SmartKey or SmartKey with
KEYLESS-GO* removed from the starter
switch or the SmartKey with KEYLESS-GO*
removed from the vehicle, the power seats
can be operated. Therefore, do not leave
children unattended in the vehicle, or with
access to an unlocked vehicle. A child’s un-
supervised access to a vehicle could result
in an accident and/or serious personal
injury.

393 Controls in detail
Memory function
Each stored position on the passenger side
includes the following settings:

Seat position and lumbar support


Multicontour seat*: previously saved
setting


Drive-dynamic multicontour seat*: ac-
tivation/deactivation
Each stored position in the rear passenger
compartment includes the following set-
tings (Canada only):


Seat position


Multicontour seat*: previously saved
settingMMemory button
1 2 3Memory position buttons
Storing positions into memory
Adjust the seat (
page 373) to the de-
sired position.

On the driver’s side: Adjust the steering
wheel (
page 386) and the exterior
rear view mirrors (
page 388) to the
desired position.

Press memory buttonM.

Release memory buttonM and press
one of the memory position buttons
within 3 seconds.
All the settings are stored with the se-
lected position.
Recalling positions from memory
Press and hold one of the position
buttons until the seat, steering wheel
and exterior rear view mirrors have fully
moved to the stored positions.
!
Do not operate the power seats using the
memory button if the seat backrest is in an ex-
cessively reclined position. Doing so could cause
damage to front or rear seats.
First move seat backrest to an upright position.
i
Releasing the button immediately stops
movement to the stored positions.
The multicontour seat* and/or lumbar support
will continue to be adjusted.

421 Controls in detail
Driving and parking
The coolant temperature is above
248°F (120°C)
The coolant is too hot and is no longer
cooling the engine.
Stop the vehicle in a safe location as
soon as possible and turn off the en-
gine. Allow engine and coolant to cool
off.

Check the coolant level and add cool-
ant if necessary (
page 579).In case of accident
If the vehicle is leaking gasoline:

Do not start the engine under any cir-
cumstances.

Move away from vehicle.

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.
Parking
i
Excessive coolant temperatures trigger a
warning message in the multifunction display
(
page 680).
Warning!
G
With the engine not running, there is no
power assistance for the brake and the
steering systems. In this case, it is impor-
tant to keep in mind that a considerably
higher degree of effort is necessary to brake
and steer the vehicle.Warning!
G
Do not park this vehicle in areas where com-
bustible materials such as grass, hay, or
leaves can come into contact with the hot
exhaust system, as these materials could be
ignited and cause a vehicle fire.
To reduce the risk of personal injury as a re-
sult of vehicle movement, before turning off
the engine and leaving the vehicle always:

Keep right foot on brake pedal.


Engage electronic parking brake.


424 Controls in detailDriving and parkingAutomatically engaging electronic park-
ing brake* (USA only)
Your vehicle’s electronic parking brake is
automatically engaged when DISTRONIC
Plus* (
page 451) brings your vehicle to a
standstill and at least one of the following
conditions is met:


The engine is switched off.


The driver’s door is opened and the
seat belt is not inserted in the seat belt
buckle.


The hood is released.


The trunk lid is open while reverse
gearR is engaged.


The vehicle is parked for an extended
period of time.
The red indicator lamp 0 (USA only) or
! (Canada only) in the instrument clus-
ter comes on.Emergency braking with electronic
parking brake
In an emergency situation, you can also
brake your vehicle while driving by using
the electronic parking brake.

While driving, press handle for elec-
tronic parking brake (
page 422).
During the braking procedure, the red indi-
cator lamp 0 (USA only) or !
(Canada only) flashes in the instrument
cluster, the message “Please Release Park-
ing Brake” appears on the multifunction
display and you will hear a warning tone.
Once the vehicle comes to a complete stop
the electronic parking brake will engage.
Turning off the engine 
Shift the automatic transmission toP
(page 430).
i
In addition to the electronic parking brake,
park position P can be automatically engaged.
i
Your vehicle will be braked for as long as you
press and hold the switch for the electronic park-
ing brake. The longer you keep the electronic
parking brake pressed, the more strongly your
vehicle will be braked. This method occurs on all
4 wheels, not just the rear wheels.
i
If the engine cannot be turned off as de-
scribed, see “Emergency engine shut-down”
(
page 744).Warning!
G
Do not turn off the engine before the vehicle
has come to a complete stop. With the en-
gine not running, there is no power assis-
tance for the brake and steering systems. In
this case, it is important to keep in mind that
a considerably higher degree of effort is nec-
essary to brake and steer the vehicle.!
Observe instructions


when taking the vehicle through an
automatic conveyor type car wash
(page 618)


when towing the vehicle (
page 737)