Mercedes-Benz 2009 R-Class, Operator'S Manual

Page: 144 / 412

Automatic transmission
142
One-touch gearshifting
With the automatic transmission in drive
position
D, you can limit or extend the gear
range using the steering wheel gearshift
contol.
Steering wheel gearshift control
1
Limiting gear range
2
Extending gear range
i You cannot shift with the steering wheel
gearshift control when the automatic
transmission is in park position
P, neutral
position N, or reverse gear R.
Limiting gear range
G
Warning!
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.
X Briefly pull left gearshift control
1
.
The automatic transmission will shift into
the next lower gear as permitted by the
shift program. This action simultaneously
limits the gear range of the automatic
transmission.
i To avoid overrevving the engine when
downshifting, the automatic transmission
will not shift into a lower gear if the engine’s
maximum speed would be exceeded.
Extending gear range
X
Briefly pull right gearshift control
2
.
The automatic transmission will shift into
the next higher gear as permitted by the
shift program. This action simultaneously
extends the gear range of the automatic
transmission.
i If you press on the accelerator pedal
when the engine has reached the
revolution limit of the current gear range,
the automatic transmission will upshift
beyond any gear range limit selected.
Canceling gear range limit
X Pull and hold right gearshift control
2
until
the gear range indicator disappears from
the multifunction display.
The automatic transmission will shift from
the current gear range directly into gear
range
D.
Shifting into optimal gear range
X
Pull and hold left gearshift control
1
.
The automatic transmission will select the
gear range suited for optimal acceleration
and deceleration automatically. This will
involve shifting down one or more gears.
Controls in detail