change wheel MERCEDES-BENZ S550 2007 W221 User Guide

403 Controls in detail
Driving systems
Active Body Control (ABC)*
The ABC system automatically selects the
optimum suspension tuning and ride
height for your vehicle.
The ABC system consists of an active, hy-
draulically controlled suspension and
damping system.
Vehicle level control with ABC*
Your vehicle automatically adjusts its ride
height to:

reduce fuel consumption


increase vehicle stability
The vehicle chassis ride height is raised or
lowered according to the selected level
setting and to the vehicle speed:


With increasing speed, ride height is re-
duced by up to approximately 0.6 in
(15 mm).


With decreasing speed, the ride height
is again raised to the selected vehicle
level.The following vehicle level settings can be
selected when the vehicle is stationary:
Select the “Raised” level setting only when
required by current driving conditions.
Otherwise:


Fuel consumption may increase.


Handling may be impaired.
i
These height adjustments are so small that
you may not notice any change.
LevelNormal
For driving on normal roads.
The indicator lamp is off.
Raised
For driving on rough roads or
with snow chains. The indica-
tor lamp is on.
i
The selected vehicle level setting remains
stored in memory even if the engine is turned off
and restarted.
Warning!
G
To help avoid personal injury, keep hands
and feet away from wheel housing area, and
stay away from under the vehicle when low-
ering the vehicle chassis.

416 Controls in detailDriving systemsThe red 10 in (0.25 m) guide line4, the
yellow 39 in (1 m) guide line3 and the
yellow 13 ft (4 m) guide line2 correspond
to the relevant distance from the rear of
the vehicle. The yellow and blue guide lines
for vehicle width1 show the required
width for the vehicle.
5Blue guide lines for straight driving
6Symbol for “reverse parking”
7Yellow and red guide lines for cornering
When you turn the steering wheel out of
the straight-ahead position, the positions
of the yellow and red guide lines7
change depending on the steering wheel’s
position. The space required by the vehicle
for reverse cornering is indicated by yellow
and red guide lines7.Backing in straight

Switch on the ignition (
page 315).

Switch on COMAND (
page 79).

Move gear selector lever to position R
(reverse gear).

Use the COMAND controller
(page 82) to select “reverse parking”
function 6.
You will see the guide lines for reverse
parking on the COMAND display.
The desired parking space is wide
enough if nothing is inside the yellow
and blue guide lines1 of your intend-
ed driving path or protrudes into this
area.

Back in straight carefully.
Warning!
G
Please note that objects which do not touch
the ground, such as the bumper of a vehicle
parked behind you, a trailer hitch, or the
back of a truck, may appear to be further
away than they actually are. In this case, you
should not use the guide lines to judge dis-
tance as the use of the guide lines to judge
distance increases the risk of impacting the
objects.
Even when the object you approach is di-
rectly on the ground (and nothing on the ob-
ject extends above the ground beyond the
object's contours directly touching the
ground) and no objects that do not touch
the ground, such as the bumper of a vehicle
parked behind you, a trailer hitch, or the
back of a truck are in the path, do not ap-
proach the object on the ground any closer
than red guide line4.
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The Dynamic Rear View Monitor must be ac-
tivated in the instrument cluster control system
in order for it to be switched on (
page 253).
!
While parking, do not approach any obsta-
cles closer than indicated by red guide line4.

419 Controls in detail
Driving systems
5Bent blue guide line
Back up with the set wheel angle.
The guide lines in the COMAND display
disappear. After a short distance, the
bent blue guide line5 appears.

Back up until bent guide line5 inter-
sects the edge of the parking space,
e.g. the curb.

Stop the vehicle.
6Yellow and red guide lines for cornering
7Blue guide line for straight driving

With the vehicle at a standstill, turn
steering wheel as far as it will go in the
opposite direction.
The guide lines for straight driving7
and cornering6 appear in the
COMAND display.

Back up using the set wheel angle until
blue guide line7 for straight driving is
parallel to the edge of the parking
space, e.g. the curb.

Now straighten out steering wheel and
back up until you still have just enough
room behind the vehicle.
While doing so, observe
Parktronic* (
page 405) or Park As-
sist* (
page 409) warning indicators.
i
If you turn the steering wheel while backing
up, the following appears in the COMAND dis-
play: “The steering wheel position has been
changed. Park Assist disabled.”. Pull out of the
parking space and start the parking procedure
over again.

421 Controls in detail
Driving systems
Switching on or off
You can only switch on the Night View As-
sist if

the SmartKey in the starter switch is
set to position2


it is dark


the light switch is set to * or B
or if the daytime driving lamps are
switched on


the automatic transmission is not in
positionR
1Night View Assist on or off

Press button1.
The Night View Assist image appears
on the multifunction display.
Image on multifunction display
When you switch on Night View Assist, the
image for the speed gauge changes on the
multifunction display. The speed gauge is
shown as a bar on the lower edge of the
multifunction display. The line for main
menus is no longer available. If you would
like to change a setting using the steering
wheel buttons, you must first switch off
Night View Assist.1Night View Assist image
2Speedometer display
i
The infrared headlamps only come on above
a speed of approx. 9 mph (15 km/h). Therefore,
when you are at a standstill, you do not have a
complete view and cannot check the function of
the Night View Assist.
i
If you change the brightness of the instru-
ment cluster while Night View Assist is switched
on, only the brightness of the multifunction dis-
play is changed.

510 OperationTires and wheelsPlacard (Example B)
1Vehicle Tire Information placard with
recommended cold tire inflation
pressures
Placard (Example B) lists the recommend-
ed cold tire inflation pressures for maxi-
mum loaded vehicle weight. The tire
inflation pressures listed apply to the tires
installed as original equipment.Important notes on tire inflation
pressure
Tire temperature and tire inflation pressure
are also increased while driving, depending
on the driving speed and the tire load.
If you will be driving your vehicle at high
speeds of 100 mph (160 km / h) or higher,
where it is legal and conditions allow,
consult the placard on the inside of the fuel
filler flap on how to adjust the cold tire in-
flation pressure. If you do not adjust the
tire inflation pressure, excessive heat can
build up and result in sudden tire failure.Be sure to readjust the tire inflation
pressure for normal driving speeds. You
should wait until the tires are cold before
adjusting the tire inflation pressure.
Some vehicles may have supplemental tire
inflation pressure information for vehicle
loads less than the maximum loaded vehi-
cle condition (
page 518). If such infor-
mation is provided, it can be found on the
placard located on the inside of the fuel fill-
er flap (
page 489).
Tire inflation pressure changes by approxi-
mately 1.5 psi (0.1 bar) per 18°F (10°C) of
air temperature change. Keep this in mind
when checking tire inflation pressure
where the temperature is different from
the outside temperature.
i
Placard (Example B) may list recommended
cold tire inflation pressures for different vehicle
loads.
Warning!
G
If the tire inflation pressure repeatedly
drops:

Check the tires for punctures from
foreign objects.


Check to see whether air is leaking from
the valves or from around the rim.

515 Operation
Tires and wheels

Press#.
The message
Tire pressure monitor
reactivated
appears in the multifunction display.
After a few minutes driving, the current
tire inflation pressure values are ac-
cepted as reference values and then
monitored.
If you wish to cancel activation:

PressL.
or

Press$ to exit menu screen.Run Flat Indicator (Canada only)
While the vehicle is being driven, the Run
Flat Indicator monitors the set tire inflation
pressures by evaluating each wheel’s rota-
tional speed. This allows the system to de-
tect a significant loss of pressure in a tire.
If a wheel’s rotational speed changes due
to falling tire inflation pressure, you will
see a corresponding warning message in
the multifunction display.
The Run Flat Indicator may function in a re-
stricted manner or with a delay if:


snow chains are mounted to the
vehicle


in presence of ice and snow


you are driving on a loose surface (e.g.
sand or gravel)


you are driving in a very sporty manner
(involving rapid acceleration or high
speeds in curves)
i
When the wheel positions are changed on
the vehicle, it is possible that the air pressure is
temporarily displayed for the wrong position.
This will be corrected after driving for several
minutes, and the air pressure will be shown for
the correct position.
Warning!
G
When the multifunction display shows the
message “Tire pressure Check tires”, one or
more of your tires is significantly under-in-
flated. You should stop and check your tires
as soon as possible, and inflate them to the
proper tire inflation pressure as indicated on
the vehicle’s tire information placard. Driv-
ing on a significantly underinflated tire caus-
es the tire to overheat and can lead to tire
failure. Under-inflation also reduces fuel ef-
ficiency and tire tread life, and may affect
the vehicle’s handling and stopping ability.
Each tire, including the spare, should be
checked monthly when cold and set to the
tire inflation pressure recommended by the
vehicle manufacturer on the vehicle placard
or the tire inflation pressure label.

516 OperationTires and wheels
Reactivating the Run Flat Indicator
The tire inflation pressure monitor must be
reactivated in the following situations:

If you have changed the tire inflation
pressure


If you have replaced the wheels or tires


If you have installed new wheels or
tires

Using the tire placard on the driver’s
door B-pillar (
page 503) or, if avail-
able, the inside of the fuel filler flap
(
page 489), make sure the tire infla-
tion pressure of all four tires is correct.

Switch on the ignition (
page 315).

Press( or& to select the menu
“Service”.

Press$ or% to select “Tire
pressure”.

Press#.
The message
Run Flat Indicator
active
Reactivation possible: OK
appears in the multifunction display.

Press#.
The message
Tire pressure
now OK?
appears in the multifunction display.
Warning!
G
The Run Flat Indicator does not provide a
warning for wrongly selected tire inflation
pressures. Always adjust tire inflation pres-
sure according to the placard on the driver’s
door B-pillar or fuel filler flap.
The Run Flat Indicator does not replace reg-
ular checks of the tire inflation pressures
since a gradual pressure loss in all four tires
cannot be detected by the Run Flat
Indicator.
The Run Flat Indicator is not able to issue a
warning due to a sudden dramatic loss of
tire inflation pressure (e.g. tire blowout
caused by a foreign object). In this case
bring the vehicle to a halt by carefully apply-
ing the brakes and avoiding abrupt steering
maneuvers.
Warning!
G
The Run Flat Indicator can only warn you in
a reliable manner if you have set the correct
tire inflation pressures for each tire.
If an incorrect tire inflation pressure was
set, the system will monitor the pressure ac-
cording to the incorrect value.
i
The menu overview can be found on
(
page 243).

529 Operation
Tires and wheels
Rotating tires
Tire rotation can be performed on vehicles
with tires of the same dimension all
around. If your vehicle is equipped with
tires of the same dimension all around,
tires can be rotated, observing a
front-to-rear rotation pattern that will
maintain the intended rotation (spinning)
direction of the tire (
page 503).
In some cases, such as when your vehicle
is equipped with mixed-size tires (different
tire dimension front vs. rear), tire rotation
is not possible.If applicable to your vehicle’s tire configu-
ration, tires can be rotated according to
the tire manufacturer’s recommended in-
tervals in the tire manufacturer’s warranty
pamphlet located in your vehicle literature
portfolio. If none is available, tires should
be rotated every 3 000 to 6 000 miles
(5 000 to 10 000 km), or sooner if neces-
sary, according to the degree of tire wear.
The same rotation (spinning) direction
must be maintained (
page 503).
Rotate tires before the characteristic tire
wear pattern becomes visible (shoulder
wear on front tires and tread center wear
on rear tires).
Thoroughly clean the mounting face of
wheels and brake disks, i.e. the inner side
of the wheels/tires, during each rotation.
Check for and ensure proper tire inflation
pressure.For information on wheel change, see the
“Practical hints” section (
page 629).
Warning!
G
Rotate front and rear wheels only if the tires
are of the same dimension.
If your vehicle is equipped with mixed-size
tires (different tire dimensions front vs.
rear), tire rotation is not possible.
Warning!
G
Have the tightening torque checked after
changing a wheel. Wheels could become
loose if not tightened with a torque of
110 lb-ft (150 Nm).
Only use Genuine Mercedes-Benz wheel
bolts specified for your vehicle’s rims.

530 OperationWinter drivingBefore the onset of winter, have your
vehicle winterized at an authorized
Mercedes-Benz Center. This service
includes:

Check of anticorrosion and antifreeze
concentration.


Addition of cleaning concentrate to the
water of the windshield and headlamp
cleaning system. Add MB Concentrate
“S” to a premixed windshield washer
solvent/antifreeze which is formulated
for below freezing temperatures
(page 666).


Battery test. Battery capacity drops
with decreasing ambient temperature.
A well charged battery helps to make
sure that the engine can be started,
even at low ambient temperatures.


Tire change.
Winter tires
Always use winter tires at temperatures
below 45°F (7°C) and whenever wintry
road conditions prevail. Not all M+S rated tires provide special winter performance.
Make sure the tires you use show the
mountain/snowflake.marking on the
tire sidewall. These tires meet specific
snow traction performance requirements
of the Rubber Manufacturers Association
(RMA) and the Rubber Association of Can-
ada (RAC) and have been designed specif-
ically for use in snow conditions. Use of
winter tires is the only way to achieve the
maximum effectiveness of the ABS, EBP
and ESP
® in winter operation.
For safe handling, make sure that all
mounted winter tires are of the same make
and have the same tread design.Always observe the speed rating of the
winter tires installed on your vehicle. If the
maximum speed for which your tires are
rated is below the speed rating of your
vehicle, you must place a notice to this
effect where it will be seen by the driver.
Such notices are available from your tire
dealer or from any authorized
Mercedes-Benz Center.
Warning!
G
Winter tires with a tread depth under
1/6in
(4 mm) must be replaced. They are no
longer suitable for winter operation.
Warning!
G
If you use your spare tire when winter tires
are fitted on the other wheels, be aware that
the difference in tire characteristics may
very well impair turning stability and that
overall driving stability may be reduced.
Adapt your driving style accordingly.
Have the spare tire replaced with a winter
tire at the nearest authorized
Mercedes-Benz Center.

568 Practical hintsWhat to do if …?Display
Possible cause/consequence
Possible solution
Tire pressure
Check tires
The pressure has fallen significantly in one
or more tires.

Carefully bring the vehicle to a halt, avoiding abrupt steering
and braking maneuvers. Observe the traffic situation around
you.

Check and adjust tire inflation pressure as required
(page 511).

If necessary, change the wheel (
page 629).

Restart the Run Flat Indicator* after adjusting the tire infla-
tion pressure values (
page 516).
Tire pressure monitor
inoperative
The Advanced TPMS* or a wheel sensor is
malfunctioning.

Have the Advanced TPMS* checked by an authorized
Mercedes-Benz Center.
Tire pressure monitor
inoperative
No wheel sensors
The Advanced TPMS* is deactivated be-
cause wheels without proper sensors were
installed.

Have the wheel sensors installed by an authorized
Mercedes-Benz Center.
As soon as all wheels with sensors have been mounted, the
Advanced TPMS* is switched back on after driving for sever-
al minutes.
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 will cause excessive
heat build-up and possibly a fire.