MERCEDES-BENZ SLK55AMG 2008 R171 Owner's Manual

160 Controls in detail
Automatic transmission*
Gear ranges
With the gear selector lever in drive
positionD and driving in program modeC
orS, you can select a gear range for the
automatic transmission to operate within.
Gear selector lever (
page 162):
You can limit the gear range by pressing
the gear selector lever to the left (D-), and
reverse the gear range limit by pressing
the gear selector lever to the right (D+).
Steering wheel gearshift control*
(
page 163):
You can limit the gear range by pulling the
left gearshift paddle on the steering wheel
gearshift control, and reverse the gear
range limit by pulling the right gearshift
paddle on the steering wheel gearshift
control.The selected gear range appears in the
multifunction display.
1Current gear range
Effect
ïThe transmission shifts through
sixth gear only.
îThe transmission shifts through
fifth gear only.
éThe transmission shifts through
fourth gear only.
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.

161 Controls in detail
Automatic transmission*
Automatic shift program
The program mode selector switch is
located on the lower part of the center
console.
Program mode selector switch
C Comfort For comfort driving
S Sport For standard driving
Program mode selector switch on vehicles
with AMG-Sport Package* and SLK 55 AMG
only
M Manual For manual gear shifting
(
page 165)
C Comfort For comfort driving
S Sport For standard drivingThe selected program mode appears in the
multifunction display.
1Current program mode!Never change the program mode when the
gear selector lever is out of park 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.

162 Controls in detail
Automatic transmission*
Press program mode selector switch
repeatedly until the letter of the
desired program mode appears in the
multifunction 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.
SelectSfor standard driving:

The vehicle starts out in first gear.

Upshifts occur later.Gear selector lever one-touch
gearshifting
With the gear selector lever in drive posi-
tion D and driving in program modeC orS,
you can limit or extend the gear range.
If your vehicle is equipped with manual
shift programM, you can use the gear
selector lever to manually shift the gears.
The following instructions describe opera-
tion of the gear selector lever when driving
in the automatic program modeC orS.Limiting gear range
Briefly press the gear selector lever to
the left in theD-direction.
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 160).
iFor information on using the gear selector
lever in program modeM, see “Manual shift
program*” (
page 165).
!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 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.
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
exceeded.

163 Controls in detail
Automatic transmission*
Extending gear range
Briefly press the gear selector lever to
the right in theD+direction.
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 the gear selector lever
in theD+direction until
D reappears in
the multifunction display (
page 157).
The transmission will shift from the
current gear range directly to gear
rangeD.
Shifting into optimal gear range
Press and hold the gear selector lever
in theD-direction.
The transmission will automatically
select the gear range suited for optimal
acceleration and deceleration. This will
involve shifting down one or more
gears.Steering wheel gearshift control
one-touch gearshifting*
With the gear selector lever in drive
positionD and driving in program modeC
orS, you can limit or extend the gear
range.
If your vehicle is equipped with manual
shift programM, you can use the steering
wheel gearshift control to manually shift
the gears.
iIf you press on the accelerator when the
engine has reached its rpm limit, the transmis-
sion will upshift beyond any gear range limit
selected.
iFor information on using the steering wheel
gearshift control in program modeM, see
“Manual shift program*” (
page 165).
!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 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.

164 Controls in detail
Automatic transmission*
Gearshift paddles (example illustration
vehicles with AMG-Sport Package*)
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 the automatic program
modeC orS.Limiting gear range
Briefly 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 160).Extending gear range
Briefly 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.
iYou cannot shift with the steering wheel
gearshift paddles when the gear selector lever is
in positionP,N orR.
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
exceeded.
iIf you press on the accelerator when the
engine has reached its rpm limit, the trans-
mission will upshift beyond any gear range limit
selected.

165 Controls in detail
Automatic transmission*
Canceling gear range limit
Pull and hold right shift paddle2
until
D reappears in the multifunction
display (
page 157).
The transmission will shift from the
current gear range directly to gear
rangeD.
Shifting into optimal gear range
Pull and hold left shift paddle1.
The transmission will automatically
select the gear range suited for optimal
acceleration and deceleration. This will
involve shifting down one or more
gears.
Manual shift program*
Manual shift program is available on
vehicles with AMG-Sport Package* and
SLK 55 AMG only.
In addition to the automatic shift
programC orS, your vehicle is equipped
with the manual shift programM.
In the manual program modeM,
system-controlled automatic gearshifting
is switched off and you need to change the
gears by manually upshifting or downshift-
ing using the steering wheel gearshift
paddles (
page 164) or the gear selector
lever.The program mode selector switch is
located on the lower part of the center
console.Program mode selector switch
M Manual For manual gear shifting
C Comfort For comfort driving
S Sport For standard driving
The selected program mode appears in the
multifunction display (
page 161).
!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 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.
iFor information on automatic program
modesC orS, see “Automatic shift program”
(
page 161), “Gear selector lever one-touch
gearshifting” (
page 162), and “Steering wheel
gearshift control one-touch gearshifting*”
(
page 163).

166 Controls in detail
Automatic transmission*
Activating manual shift program
Press program mode selector switch
repeatedly until the
M for manual
program modeM appears in the multi-
function 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 drive
positionD. You can upshift or downshift
through the gears in succession.Upshifting
Briefly press the gear selector lever to
the right in theD+direction.
or
Briefly pull right shift paddle2
(
page 164).
The transmission shifts to the next
higher gear.
If, instead of the manual program mode
symbol
M, thep symbol appears in the
multifunction display (
page 161), shift to
the next higher gear. The fuel supply will
otherwise be interrupted to prevent the
engine from overrevving.If you have selected the AMG menu in the
control system and you are driving in the
manual program modeM, upshift
indicator2 in the multifunction display
advises you to upshift before the engine
reaches the overspeed range. Thus you
can drive at the maximum engine speed for
each gear without overrevving the engine.
1Gear indicator
2Upshift indicator
Shift to the next higher gear.
The fuel supply will otherwise be
interrupted to prevent the engine
from overrevving.
iThe manual program modeM will not be
stored. When the engine is turned off with the
manual program modeM selected, the transmis-
sion will go to the automatic program mode
(CorS) when the engine is restarted.
!In the manual program modeM, the trans-
mission will not upshift, even if the engine has
reached its overrevving range. Shift up to the
next gear before the engine has reached its over-
revving range. Make absolutely certain that the
engine speed does not reach the red marking on
the tachometer (
page 26). Otherwise the
engine could be damaged which is not covered
by the Mercedes-Benz Limited Warranty.

167 Controls in detail
Automatic transmission*
Downshifting
Briefly press the gear selector lever to
the left in theD-direction.
or
Briefly pull left shift paddle1
(
page 164).
The transmission shifts to the next
lower gear.Kickdown
Using the kickdown when driving in the
manual program modeM is not possible.
Deactivating manual shift program
Press the program mode selector
switch (
page 165) repeatedly
until
CorS appears in the multifunction
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 becomes less
responsive or sluggish or the transmission
no longer shifts, the transmission is most
likely operating in limp-home (emergency
operation) mode. In this mode only second
gear and reverse gear can be selected.
Stop the vehicle in a safe location.
Move the gear selector lever to park
positionP.
Turn off the engine.
Wait at least 10 seconds before
restarting.
Restart the engine.
Move the gear selector lever to
positionD (for second gear) or
positionR.
Have the transmission checked at an
authorized Mercedes-Benz Center as
soon as possible.
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 transmission
shifts down to a gear from which you can easily
accelerate or take off.

168 Controls in detail
Good visibility
For information on the windshield wipers,
see “Windshield wipers” (
page 56).
Headlamp cleaning system*
The headlamps will automatically be
cleaned with a high-pressure water jet
when you have

switched on the headlamps
and

operated the windshield wipers with
windshield washer fluid five times
When you switch off headlamps, the
counter resets.
For information on filling up the washer
reservoir, see “Windshield washer system
and headlamp cleaning system*”
(
page 301).
Rear view mirrors
For more information on setting the rear
view mirrors, see “Mirrors” (
page 46).
Interior rear view mirror, antiglare
position
Tilt the mirror to the antiglare night
position by moving the lever towards
the windshield.
The interior rear view mirror is dimmed.Auto-dimming rear view mirrors*
The reflection brightness of the exterior
rear view mirrors and the interior rear view
mirror will respond automatically to glare
when

ignition is switched on
and

incoming light from headlamps falls on
the sensor in the interior rear view
mirror
The rear view mirrors will not react if

reverse gearR is engaged

interior lighting is switched on

169 Controls in detail
Good visibility
Sun visors
The sun visors protect you from sun glare
while driving.
1Mirror lamp*
2Mounting
3Mirror cover
4Sun visor
Warning!G
The auto-dimming function does not react if
incoming light is not aimed directly at sen-
sors in the interior rear view mirror.
The interior rear view mirror and the exterior
rear view mirror on the driver’s side do not
react, for example, if the wind screen* is
installed.
Light hitting the mirror(s) at certain angles
(incident light) could blind you. As a result,
you may not be able to observe traffic
conditions and could cause an accident.
Warning!G
Exercise care when using the passen-
ger-side exterior rear view mirror. The mirror
surface is convex (outwardly curved surface
for a wider field of view). Objects in mirror
are closer than they appear. Check your
interior rear view mirror or glance over your
shoulder before changing lanes.