Mercedes-Benz GL Operator's Manual page 210

Driving systems
208
Stopping
G
WARNING
When leaving the vehicle, even if it is braked
only by DISTRONIC PLUS, it could roll away if:
there is a malfunction in the system or in
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the voltage supply.
DISTRONIC PLUS has been deactivated
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with the cruise control lever, e.g. by a
vehicle occupant or from outside the
vehicle.
the electrical system in the engine
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compartment, the battery or the fuses have
been tampered with.
the battery is disconnected.
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the accelerator pedal has been depressed,
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e.g. by a vehicle occupant.
There is a risk of an accident.
If you wish to exit the vehicle, always turn off
DISTRONIC PLUS and secure the vehicle
against rolling away.
If DISTRONIC PLUS detects that the vehicle
in front is stopping, it brakes your vehicle until
it is stationary.
Once your vehicle is stationary, it remains
stationary and you do not need to depress the
brake.
After a time, the electric parking brake
secures the vehicle and relieves the service
brake.
Depending on the specified minimum
distance, your vehicle will come to a standstill
at a sufficient distance behind the vehicle in
front. The specified minimum distance is set
using the control on the cruise control lever.
The electric parking brake automatically
secures the vehicle if DISTRONIC PLUS is
activated and:
the driver's door is open and the driver's
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seat belt is unfastened.
the engine is switched off, unless it is
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automatically switched off by the ECO
start/stop function.
a system malfunction occurs.
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the power supply is not sufficient.
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On steep uphill or downhill inclines or if there
is a malfunction, the transmission may also
automatically be shifted into position P.
Setting a speed
Keep in mind that it may take a brief moment
until the vehicle has accelerated or braked to
the speed set.
Press the cruise control lever up : for a
X
higher speed or down ; for a lower speed.
To adjust the set speed in 1 mph
X
increments (1 km/h increments): briefly
press the cruise control lever up : or
down ; to the pressure point.
Every time the cruise control lever is
pressed up : or down ; the last speed
stored is increased or reduced.
To adjust the set speed in 5 mph
X
increments (10 km/h increments):
briefly press the cruise control lever
up : or down ; to the pressure point.
Every time the cruise control lever is
pressed up : or down ;, the last speed
stored is increased or reduced.
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If you accelerate to overtake, DISTRONIC
PLUS adjusts the vehicle's speed to the last
speed stored after you have finished
overtaking.