Mercedes-Benz 2011 GL-Class Operator's Manual page 158

Automatic transmission
156
Restricting the shift range
X
Pull the left-hand steering wheel paddle
shifter.
The shift range is restricted.
i
In order to prevent the engine from
overrevving, the automatic transmission
does not shift down when the engine speed
is too high.
i If the maximum engine speed for the shift
range is reached and you continue to
accelerate, the automatic transmission
shifts up in order to prevent the engine
from overrevving, even if the shift range is
restricted.
Derestricting the shift range
X
Pull the right-hand steering wheel paddle
shifter.
The shift range is derestricted.
Clearing the shift range restriction
X
Pull and hold the right-hand steering wheel
paddle shifter until D is shown again in the
multifunction display.
The automatic transmission shifts from the
current shift range directly to D.
Selecting the ideal shift range
X
Pull the left-hand steering wheel paddle
shifter and hold it in position.
The automatic transmission shifts to the
gear which allows ideal acceleration and
deceleration. To do this, the automatic
transmission shifts down one or more
gears.