automatic transmission MERCEDES-BENZ S CLASS 2005 User Guide

179 Controls in detail
Automatic transmission
Automatic shift program
The program mode selector switch is
located on the lower part of the center
console.
1Program mode selector switch
C Comfort For comfort driving
S Sport For standard driving
The current gear selector lever position
and the selected program mode (
C/S) are
indicated in the tachometer display
(
page 174).

Press program mode selector
switch1 repeatedly until the letter of
the desired program mode appears in
the tachometer display.
SelectCfor comfort 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.
!Never change the program mode when
the gear selector lever is out of
positionP. This could result in a
change of driving characteristics for
which you may not be prepared.iThe last selected program
mode (CorS) is switched on when the
engine is restarted.

180 Controls in detailAutomatic transmissionDriving 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.
The transmission shifts into a lower
gear.

Ease on the accelerator when you have
reached the desired speed.
The transmission shifts up again.Stopping
When you stop briefly, e.g. at traffic lights:

Leave the transmission in gear.

Hold the vehicle with the brake.
When you stop longer with the engine
idling or on an uphill gradient:

Move the gear selector lever to
positionP.

Set the parking brake.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.
Working on the vehicleWarning!
G
When working on the vehicle, set the
parking brake and move gear selector lever
to positionP. Otherwise the vehicle could
roll away.

181 Controls in detail
Automatic transmission
Steering wheel gearshift control (Speedshift) S 55 AMG
When driving in the automatic program
modesC orS, or in the manual program
modeM, you can change the gears
manually on the steering wheel or by using
the gear selector lever (
page 175).The steering wheel gearshift buttons are
located to the left and right of the steering
wheel.
1Left button: downshift
2Right button: upshift
iTo avoid overrevving the engine when
downshifting with steering wheel
gearshift buttons, the transmission will
not shift to a lower gear if the engine’s
max. speed would be exceeded.
!Allow engine to warm up under low
load use. Do not place full load on the
engine until the operating temperature
has been reached.
Shift into reverse gearR or parking
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.

182 Controls in detailAutomatic transmission
Downshifting
Press button1 on the left side of the
steering wheel.
The transmission will shift to the next
lower gear as permitted by the shift
program. This action simultaneously limits
the gear range of the transmission
(
page 176) when you are driving in the
automatic program mode (CorS). Upshifting

Press button2 on the right side of the
steering wheel.
The transmission will shift to the next
higher gear as permitted by the shift
program. This action simultaneously
extends the gear range of the transmission
when you are driving in the automatic
program mode (CorS).
iYou cannot shift with the steering
wheel gearshift buttons when the gear
selector lever is in positionP,N orR.
The manual program modeM will not
be stored. When the engine is turned
off with the manual program modeM
selected, the transmission will go to
the automatic program mode (CorS)
when the engine is restarted.
The last selected program
mode (CorS) is switched on when the
engine is restarted in the automatic
program mode.
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.

183 Controls in detail
Automatic transmission
Manual shift program S 55 AMG
In the manual program modeM you can
change the gears manually on the steering
wheel (
page 181) or by using the gear
selector lever (
page 175).The program mode selector switch is
located on the lower part of the center
console.
1Program mode selector switch
M Manual For manual gear shifting
C Comfort For comfort driving
S Sport For standard driving
The current gear selector lever position
and the selected program mode (
M/C/S)
are indicated in the tachometer display
(
page 174).Activating manual shift program

Press program mode selector
switch1 repeatedly until the
M for the
manual program modeM appears in
the tachometer display.
The transmission switches to the
manual program modeM. Automatic
shifting is switched off. The gear range
is not limited.
You can change the gears manually when
the gear selector lever is in positionD. You
can upshift or downshift through the gears
in succession.
!Allow engine to warm up under low
load use. Do not place full load on the
engine until the operating temperature
has been reached.
Shift into reverse gearR or parking
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.

184 Controls in detailAutomatic transmissionDownshifting
Briefly press the gear selector lever to
the left in theD-direction
(page 175).
or

Press button1 on the left side of the
steering wheel (
page 181).
The transmission shifts to the next
lower gear.Upshifting

Briefly press the gear selector lever to
the right in theD+direction
(page 175).
or

Press button2 on the right side of the
steering wheel (
page 181).
The transmission shifts to the next
higher gear. Kickdown
The kickdown can also be used for
maximum acceleration when driving in the
manual program modeM.

Press the accelerator past the point of
resistance.
The transmission shifts to a lower gear.

Shift up once the desired speed has
been reached.
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.iWhen you brake or stop, the transmis-
sion shifts down to a gear from which
you can easily accelerate or take off.
iWhen driving at full throttle, the trans-
mission shifts to the next higher gear
when maximum engine speed has been
reached.

185 Controls in detail
Automatic transmission
Deactivating manual shift program
Press the program mode selector
switch (
page 183) repeatedly
until
Cor
S appears in the tachometer
display.
or

Restart the engine.
The transmission will go to the
automatic program mode (C orS).
The manual program modeM is not
stored.Emergency operation (Limp Home
Mode)
If vehicle acceleration worsens or the
transmission no longer shifts, the trans-
mission is most likely operating in limp
home (emergency operation) mode. In this
mode only second gear and reverse gear
can be activated.
Stop the vehicle.

Move gear selector lever toP.

Turn off the engine.

Wait at least ten seconds before
restarting.

Restart the engine.

Move gear selector lever to positionD
(for second gear) orR.

Have the transmission checked at an
authorized Mercedes-Benz Center as
soon as possible.

292 OperationEngine compartmentBe careful not to spill any oil when adding.
Avoid environmental damage caused by oil
entering the ground or water.
Screw filler cap1 back on filler neck.
For more information on engine, see the
“Technical data” section (
page 429) and
(
page 431).
Transmission 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 level
The engine coolant is a mixture of water
and anticorrosion/antifreeze.
When checking the coolant level,

the vehicle must be parked on level
ground, and


the engine must be cool.
!Excess oil must be siphoned or drained
off. It could cause damage to the en-
gine and catalytic converter not cov-
ered by the Mercedes-Benz Limited
Warranty.


322 OperationTires and wheelsTire and loading terminology
Accessory weight
The combined weight (in excess of those
standard items which may be replaced) of
automatic transmission, power steering,
power brakes, power windows, power
seats, radio, and heater, to the extent that
these items are available as
factory-installed equipment (whether
installed or not).
Air pressure
The amount of air inside the tire pressing
outward on each square inch of the tire.
Air pressure is expressed in pounds per
square inch (psi), or kilopascal (kPa) or
bars.
Aspect ratio
Dimensional relationship between tire
section height and section width
expressed in percentage.Bar
Another metric unit for air pressure. There
are 14.5038 pounds per square inch (psi)
to 1 bar; there are 100 kilopascals (kPa)
to 1 bar.
Bead
The tire bead contains steel wires wrapped
by steel cords that hold the tire onto the
rim.
Cold tire inflation pressure
Tire inflation pressure when your vehicle
has been sitting for at least three hours or
driven no more than one mile (1.6 km).
Curb weight
The weight of a motor vehicle with stan-
dard equipment including the maximum
capacity of fuel, oil, and coolant, and, if so
equipped, air conditioning and additional
optional equipment, but without passen-
gers and cargo.DOT (D
epartment o
f T
ransportation)
A tire branding symbol which denotes the
tire meets requirements of the
U.S. Department of Transportation.
GAWR (G
ross A
xle W
eight R
ating)
The GAWR is the maximum permissible
axle weight. The gross vehicle weight on
each axle must never exceed the GAWR for
the front and rear axle indicated on the
Certification label located on the driver's
door B-pillar.
GVW (G
ross V
ehicle W
eight)
The GVW comprises the weight of the
vehicle including fuel, tools, spare wheel,
installed accessories, passengers and
cargo and, if applicable, trailer tongue
load. The GWV must never exceed the
GWVR indicated on the Certification label
located on the driver's door B-pillar.

338 Practical hintsWhat to do if …?Lamps in instrument cluster
General information:If any of the following lamps in the instru-
ment cluster fails to come on during the
bulb self-check when switching on theignition, have the respective bulb checked
and replaced if necessary.Problem
Possible cause
Suggested solution
-
The yellow ABS malfunction in-
dicator lamp comes on while
driving.
The ABS has detected a malfunction and
has switched off. The BAS and the ESP are
also switched off (see messages in multi-
function display).
The brake system is still functioning nor-
mally but without the ABS available.
If the ABS control unit is malfunctioning,
other systems such as Parktronic*,
Distronic*, and the automatic transmission
may also be malfunctioning.

Continue driving with added caution.
Wheels may lock during hard braking,
reducing steering capability.

Read and observe messages in the mul-
tifunction display (
page 347).

Have the system checked at an autho-
rized Mercedes-Benz Center as soon as
possible.
Failure to follow these instructions increas-
es the risk of an accident.
The charging voltage has fallen below
10 volts and the ABS has switched off.
The battery may not be charged sufficiently.

Switch off electrical consumers that are
currently not needed, e.g. seat heat-
ing*.

If necessary, have the generator
(alternator) and battery checked.
When the voltage is above this value again,
the ABS is operational again.