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78
Opening and closing
Problems with the key, troubleshooting
You can no longer lock or unlock the vehicle
Possible causes are:
The key battery is weak or discharged.
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Check the battery using the indicator lamp
#
(
page 74).
/
Replace the key battery, if necessary
#
(
page 76).
/
Use the replacement key.
#
Use the mechanical key to lock or unlock
#
(
page 84).
/
Have key checked at a qualified specialist
#
workshop.
There is interference from a powerful radio signal
source
Possible causes if the function of the key is
impaired:
high voltage power lines
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mobile phones
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electronic devices (notebooks, tablets)
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shielding due to metal objects or induction
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loops for electrical gate systems or automatic
barriers
Make sure that there is sufficient distance
#
between the key and the potential source of
interference.
You have lost a key
Have the key deactivated at a qualified spe-
#
cialist workshop.
If necessary, have the mechanical lock
#
replaced as well.
Digital Vehicle Key
Unlocking and locking the vehicle with the digital
vehicle key
Requirements
The vehicle is equipped with the "Digital Vehi-
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cle Key" pre-installation.
The "Digital Vehicle Key" function is activated
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via Mercedes me: https://
www.mercedes.me.
A suitable end device is activated as a Digital
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Vehicle Key.
®
Bluetooth
is switched on at the end device
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and at the vehicle.
The terminal is sufficiently charged.
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%
®
If the connection via Bluetooth
the battery of the Digital Vehicle Key is very
low, you can also lock, unlock or start the
vehicle via the NFC function. (
/
Depending on the end device, you can con-
tinue to use the KEYLESS-GO function for a
certain time even if the battery of the digital
vehicle key is very low.
The Digital Vehicle Key can be used for the follow-
ing functions:
Locking and unlocking the vehicle with the
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NFC function
Locking/unlocking the vehicle with KEYLESS-
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GO (
page 81)
/
HANDS-FREE ACCESS function (
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Convenience closing (closing the vehicle from
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outside) (
page 95)
/
is faulty or
page 169).
page 90)
/
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