Key Positions; Start/Stop Button - Mercedes-Benz GLA 250 2019 Operator's Manual

There is a risk of fire and an accident.
Release the parking brake fully before driv-
ing off.
!
Do not warm up the engine while station-
ary. Pull away immediately. Avoid high
engine speeds and full throttle until the
engine has reached its operating tempera-
ture.
In vehicles with automatic transmission,
engage positions P and R only when the
vehicle is stationary.
Where possible, avoid spinning the drive
wheels when pulling away on slippery roads.
You could otherwise damage the drive train.
!
Mercedes-AMG vehicles: avoid full-load
operation and engine speeds greater than
5000 rpm when the engine is cold. This
helps to protect the engine and avoids
uncomfortable driving.

Key positions

SmartKey
g To remove the SmartKey
(shift the transmission to position j)
Power supply for some consumers, such
1
as the windshield wipers
2 Ignition (power supply for all consumers)
and drive position
To start the engine
3
i
The SmartKey can be turned in the ignition
lock even if it is not the correct SmartKey
for the vehicle. The ignition is not switched
on. The engine cannot be started.

Start/Stop button

General notes
Vehicles with KEYLESS-GO are equipped with
SmartKeys featuring the integrated KEYLESS-
GO function and a detachable Start/Stop but-
ton.
A check which periodically establishes a radio
connection between the vehicle and the
SmartKey determines whether a valid Smart-
Key is in the vehicle. This occurs, for example,
when starting the engine.
When you insert the Start/Stop button into
the ignition lock, the system needs approx-
imately two seconds recognition time. You can
then use the Start/Stop button.
Pressing the Start/Stop button several times
in succession corresponds to the different
SmartKey positions in the ignition lock. This is
only the case if you are not depressing the
brake pedal.
If you depress the brake pedal and press the
Start/Stop button, the engine starts immedi-
ately.
To start the vehicle without actively using the
SmartKey:
the Start/Stop button must be inserted in
R
the ignition lock
the SmartKey must be in the vehicle
R
the vehicle must not be locked with the
R
SmartKey or KEYLESS-GO (
Do not keep the KEYLESS-GO key:
with electronic devices, e.g. a mobile phone
R
or another SmartKey.
with metallic objects, e.g. coins or metal
R
foil.
inside metallic objects, e.g. a metal case.
R
This can affect the functionality of KEYLESS-
GO.
If you lock the vehicle with the SmartKey
remote control or with KEYLESS-GO, after a
short time:
you will not be able to switch on the ignition
R
with the Start/Stop button.
you will no longer be able to start the engine
R
with the Start/Stop button until the vehicle
is unlocked again.
If you lock the vehicle centrally using the but-
ton on the front door (
continue to start the engine with the Start/
Stop button.
Driving
page 70)
Y
page 75), you can
Y
Z
125