Mercedes-Benz 2016 GL Operator's Manual page 193

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 roll-
ing away.
Shift the automatic transmission to posi-
X
tion 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 or 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 clus-
ter goes out.
i
The electric parking brake can only be
released:
if the SmartKey is in position 1 in the
R
ignition lock ( page 165) or
Y
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 auto-
matically:
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 con-
ditions must be fulfilled:
the engine is switched off.
R
the driver's door is open and the seat belt is
R
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.
The electric parking brake is not automati-
cally engaged if the engine is switched off by
the ECO start/stop function.
Releasing automatically
The electric parking brake is released auto-
matically 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
Parking
191
page 168).
Y
Z