Mercedes-Benz GLA 250 2019 Operator's Manual page 76

SmartKey
74
Problem
You can no longer lock
or unlock the vehicle
using KEYLESS-GO.
The engine cannot be
started using the Smart-
Key.
The engine cannot be
started using the Start/
Stop button. The Smart-
Key is in the vehicle.
Possible causes/consequences and M M Solutions
The SmartKey battery is discharged or nearly discharged.
Check the SmartKey battery (
X
sary ( page 72).
Y
If this does not work:
Unlock ( page 76) or lock (
X
Y
mechanical key.
There is interference from a powerful source of radio waves.
Unlock ( page 76) or lock (
X
Y
mechanical key.
KEYLESS-GO is malfunctioning.
Lock/unlock the vehicle using the remote control function of the
X
SmartKey.
Have the vehicle and SmartKey checked at a qualified specialist
X
workshop.
If the vehicle can also not be locked/unlocked using the remote
control function:
Unlock ( page 76) or lock (
X
Y
mechanical key.
Have the vehicle and SmartKey checked at a qualified specialist
X
workshop.
The on-board voltage is too low
Switch off non-essential consumers, e.g. seat heating or interior
X
lighting, and try to start the engine again.
If this does not work:
Check the starter battery and charge it if necessary
X
( page 294).
Y
or
Jump-start the vehicle (
X
or
Consult a qualified specialist workshop.
X
The vehicle is locked.
Unlock the vehicle and try to start the vehicle again.
X
The SmartKey battery is discharged or nearly discharged.
Check the SmartKey battery (
X
sary ( page 72).
Y
If this does not work:
Start your vehicle with the SmartKey in the ignition lock.
X
There is interference from a powerful source of radio waves.
Start your vehicle with the SmartKey in the ignition lock.
X
page 72) and replace it if neces-
Y
page 77) the vehicle using the
Y
page 77) the vehicle using the
Y
page 77) the vehicle using the
Y
page 295).
Y
page 72) and replace it if neces-
Y