2008 MERCEDES-BENZ S550 4MATIC automatic transmission

405 Controls in detail
Automatic transmission
If you want the gear position to remain in
neutral positionN, e.g. when taking the
vehicle through an automatic conveyor
type car wash or when towing the vehicle,
observe the following instructions.Vehicles with SmartKey:
With the vehicle at a standstill and the
ignition switched on shift the
automatic transmission to neutral
positionN.
If engaged, manually release the
electronic parking brake (
page 395).
Switch off the ignition and leave the
SmartKey in the starter switch.
Vehicles with KEYLESS-GO*:
With the vehicle at a standstill, depress
the brake pedal and keep it pressed.
Shift the automatic transmission to
park positionP.
Release the brake pedal.
Remove the KEYLESS-GO start/stop
button from the starter switch
(
page 345).
Insert the SmartKey with KEYLESS-GO
into the starter switch.
With the ignition switched on shift the
automatic transmission to neutral
positionN.
If engaged, manually release the
electronic parking brake (
page 395).
Switch off the ignition and leave the
SmartKey with KEYLESS-GO in the
starter switch.
!If you turn off the engine using the
SmartKey or the KEYLESS-GO* start/stop
button, the transmission will shift to neutral
positionN automatically.
Warning!G
When leaving the SmartKey or SmartKey
with KEYLESS-GO* in the starter switch, do
not leave children unattended in the vehicle.
It is possible for children to switch on the
ignition which could result in unsupervised
use of vehicle equipment. Unsupervised use
of vehicle equipment could result in an
accident and/or serious personal injury.
!Coasting the vehicle, or driving for any other
reason in neutral positionN can result in trans-
mission damage that is not covered by the
Mercedes-Benz Limited Warranty.
!Observe instructions

when taking the vehicle through an
automatic conveyor type car wash
(
page 588)

when towing the vehicle (page 702)

406 Controls in detail
Automatic transmission
Driving tips
Accelerator position
Your driving style influences the
transmission’s shifting behavior:
Less throttle Earlier upshifting
More throttle Later upshifting
Kickdown
Use kickdown when you want maximum
acceleration.
Press the accelerator past the point of
resistance.
Depending on the engine speed the
transmission shifts into a lower gear.
Ease on the accelerator when you have
reached the desired speed.
The transmission shifts up again.
Effect
êDrive
The transmission shifts
automatically. All forward gears
are available.
Warning!G
Getting out of your vehicle without shifting
into park positionP is dangerous. Also, park
positionP alone is not intended to or capa-
ble of preventing your vehicle from moving,
possibly hitting people or objects.
Always engage the electronic parking brake
(
page 395) in addition to shifting to park
positionP.
When parked on an incline, turn the front
wheels towards the road curb.
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.
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. Do not leave children unat-
tended in the vehicle, or with access to an
unlocked vehicle. Children could shift the
automatic transmission out of park
positionP, which could result in an accident
and/or serious personal injury.

407 Controls in detail
Automatic transmission
Stopping
When you stop briefly, e.g. at traffic lights:
Leave the transmission in gear.
Hold the vehicle with the brake.
When you stop for a longer period of time
with the engine idling and/or on a hill:
Engage the electronic parking brake.
Shift into park positionP.
Maneuvering
When you maneuver in tight areas,
e.g. when pulling into a parking space:
Control the vehicle speed by gradually
releasing the brakes.
Accelerate gently.
Never abruptly step on the accelerator.Rocking the vehicle
Rocking the vehicle by shifting between
drive positionD and reverse gearR can
help free a vehicle stuck in mud or snow.
The engine control system of this vehicle
electronically limits shifting between drive
positionD and reverse gearR to very low
speeds, i.e. approximately 5 mph
(9 km/h). To shift between drive
positionD and reverse gearR, move the
gear selector lever past the resistance
point up or down.
Working on the vehicleHill start assist system
On uphill grades with a gradient angle of
more than 5°, the hill start assist system
maintains the pressure in the brake sys-
tem for approximately 1 second after you
have released the brake pedal. Therefore,
you can start off smoothly without the
vehicle moving immediately after releasing
the brake pedal.
Warning!G
When working on the vehicle, engage the
electronic parking brake and shift to park
positionP. Otherwise the vehicle could roll
away.
Warning!G
The hill start assist system is not designed
to function as an electronic parking brake
and does not prevent the vehicle from mov-
ing when parked on an incline.
Always engage the electronic parking brake
in addition to shifting to park positionP.

408 Controls in detail
Automatic transmission
The hill start assist system is inactive

when starting off on a level road or
downhill grades

with the transmission in neutral
position N

with the electronic parking brake set

if the ESP® has switched off due to a
malfunction
Gear ranges
With the automatic transmission in drive
positionD and driving in program mode C
or S (
page 409), you can select a gear
range for the automatic transmission to
operate within.
You can limit the gear range by pressing
the left gearshift button or pulling the left
gearshift paddle on the steering wheel
gearshift control, and reverse the gear
range limit by pressing the right gearshift
button or pulling the right gearshift paddle
on the steering wheel gearshift control
(
page 411).The selected gear range appears in the
multifunction display.
1Current gear rangeEffect
ïThe transmission shifts through
sixth gear only (applies to
vehicles with 7-speed automatic
transmission only).
îThe transmission shifts through
fifth gear only (applies to
vehicles with 7-speed automatic
transmission only).
éThe transmission shifts through
fourth gear only.

409 Controls in detail
Automatic transmission
Automatic shift program
The program mode selector switch is used
to adjust

shift program

suspension tuning of Airmatic
(
page 440) or ABC* (page 442)

engine control
Program mode selector switch
C Comfort For comfort driving
S Sport For standard driving
Program mode selector switch (S 63 AMG
and S 65 AMG only)
M Manual For manual gear shifting
(
page 413)
C Comfort For standard driving
S Sport For sporty driving
Effect
èThe transmission shifts through
third gear only.
With this selection you can use
the braking effect of the engine.
çThe transmission shifts through
second gear only.
Allows the use of engine’s
braking power when driving:

on steep downgrades

in mountainous regions

under extreme operating
conditions
æThe transmission operates in
first gear only.
For maximum use of engine’s
braking effect on very steep or
lengthy downgrades.

410 Controls in detail
Automatic transmission
The selected program mode appears in the
multifunction display.
1Current program modePress the program mode selector
switch repeatedly until the letter of the
desired program mode appears in the
multifunction display.
SelectC for comfort driving (S 63 AMG
and S 65 AMG: standard driving):

The vehicle starts out in second
gear (both forward and reverse) for
gentler starts. This does not apply if
full throttle is applied or gear
range1 is selected.

Traction and driving stability are
improved on icy roads.

Upshifts occur earlier even when
you give more gas. The engine then
operates at lower rpms and the
wheels are less likely to spin.SelectS for standard driving
(S 63 AMG and S 65 AMG: sporty driv-
ing):

The vehicle starts out in first gear.

Upshifts occur later.
!Never change the program mode when the
automatic transmission is out of park positionP.
This could result in a change of driving character-
istics for which you may not be prepared.
iThe last selected program mode (CorS) is
switched on when the engine is restarted.

411 Controls in detail
Automatic transmission
Steering wheel gearshift control
With drive positionD selected and driving
in program modeC orS, you can limit or
extend the gear range.
If your vehicle is equipped with manual
shift program M, you can use the steering
wheel gearshift control to manually shift
the gears.
Gearshift control buttons
1Left shift button: limiting gear range
2Right shift button: extending gear
range
Gearshift control paddles (S 63 AMG and
S65AMGonly)
1Left shift paddle: limiting gear range or
downshift (in program modeM)
2Right shift paddle: extending gear
range or upshift (in program modeM)
The following instructions describe opera-
tion of the steering wheel gearshift control
when driving in program modeC orS.
iS63AMG and S65AMG only:
For information on using the steering wheel gear-
shift control in program mode M, see “Manual
shift program (S 63 AMG and S 65 AMG only)”
(
page 413).
!Allow engine to warm up under low load use.
Do not place full load on the engine until the op-
erating temperature has been reached.
Shift into reverse gearR or park positionP only
when the vehicle is stopped.
Avoid spinning of a drive wheel for an extended
period when driving off on slippery road
surfaces. This may cause serious damage to the
drivetrain which is not covered by the
Mercedes-Benz Limited Warranty.
iYou cannot shift with the steering wheel
gearshift control buttons or paddles when the
transmission in positionP,N orR.

412 Controls in detail
Automatic transmission
Limiting gear range
Briefly press left shift button1 or pull
left shift paddle1.
The transmission will shift to the next
lower gear as permitted by the shift
program. This action simultaneously
limits the gear range of the transmis-
sion (
page 408).Extending gear range
Briefly press right shift button2 or
pull right shift paddle2.
The transmission will shift to the next
higher gear as permitted by the shift
program. This action simultaneously
extends the gear range of the transmis-
sion.Canceling gear range limitPress and hold right shift button2 or
pull and hold right shift paddle2 until
the indicator for the current gear range
disappears from the multifunction dis-
play (
page 408).
The transmission will shift from the
current gear range directly to gear
rangeD.
Warning!G
On slippery road surfaces, never downshift
in order to obtain braking action. This could
result in drive wheel slip and reduced
vehicle control. Your vehicle’s ABS will not
prevent this type of loss of control.
iTo avoid overrevving the engine when down-
shifting, the transmission will not shift to a lower
gear if the engine’s max. speed would be ex-
ceeded.
iIf you press on the accelerator when the en-
gine has reached its rpm limit, the transmission
will upshift beyond any gear range limit selected.