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