Mercedes-Benz GL Operator's Manual page 192

Parking
190
The function of the electric parking brake is
dependent on the on-board voltage. If the on-
board voltage is low or there is a malfunction
in the system, it may not be possible to apply
the released parking brake.
If this is the case, only park the vehicle on
X
level ground and secure it to prevent it
rolling away.
Shift the automatic transmission to
X
position P.
It may not be possible to release an applied
parking brake, if the on-board voltage is low
or there is a malfunction in the system.
Contact a qualified specialist workshop.
i
The electric parking brake performs a
function test at regular intervals while the
engine is switched off. The sounds that can
be heard while this is occurring are normal.
Applying/releasing manually
To engage: push handle :.
X
When the electric parking brake is
engaged, the F (USA only) or !
(Canada only) red indicator lamp lights up
in the instrument cluster.
i
The electric parking brake can also be
applied when the SmartKey is removed.
To release: pull handle :.
X
The red F (USA only) or ! (Canada
only) indicator lamp in the instrument
cluster goes out.
i
The electric parking brake can only be
released:
if the SmartKey is in position 1 in the
R
ignition lock or
if the ignition was switched on using the
R
Start/Stop button.
To ensure that you do not roll backwards
when pulling away on an uphill slope, engage
the electric parking brake (
Applying automatically
The electric parking brake is applied
automatically:
if DISTRONIC PLUS brings the vehicle to a
R
standstill or
if the HOLD function is keeping the vehicle
R
stationary
In addition, at least one of the following
conditions must be fulfilled:
the engine is switched off.
R
the driver's door is open and the seat belt
R
is not fastened.
the vehicle is stationary for a lengthy
R
period.
The red F (USA only) or ! (Canada
only) indicator lamp in the instrument cluster
lights up.
Releasing automatically
The electric parking brake is released
automatically when all of the following
conditions are fulfilled:
the engine is running.
R
the transmission is in position D or R.
R
the seat belt has been fastened.
R
you depress the accelerator pedal.
R
If the transmission is in position R, the trunk
lid must be closed.
If your seat belt is not fastened, the following
conditions must be fulfilled to automatically
release the electric parking brake:
the driver's door is closed.
R
you have shifted out of transmission
R
position P or you have previously driven
faster than 2 mph (3 km/h).
page 170).
Y