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144 Opening and closing
Problems with the key, troubleshooting
You can no longer lock or unlock the vehicle
Possible causes:
The key battery is weak or discharged.
R
Check the battery using the indicator lamp
#
(
page 140).
/
Replace the key battery, if necessary
#
(
page 142).
/
Use the replacement key.
#
Use the emergency key to lock or unlock
#
(
page 154).
/
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
R
mobile phones
R
electronic devices (notebooks, tablets)
R
shielding due to metal objects or induction
R
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
Function of the Digital Vehicle Key
If you have activated a suitable terminal device,
e.g. a smartphone, as a Digital Vehicle Key, you
can use it like a conventional vehicle key.
Information on setting up a user account and acti-
vating the "Digital Vehicle Key" service can be
found at https://www.mercedes.me.
F295 0057 02
The Digital Vehicle Key can then be used for the
following functions:
Locking/unlocking the vehicle with KEYLESS-
R
GO (
page 151)
/
Locking and unlocking the vehicle with the
R
NFC function (
page 148)
/
HANDS-FREE ACCESS function (
R
Convenience closing (closing the vehicle from
R
outside) (
page 164)
/
Anti-theft protection (
page 169)
/
R
Starting the vehicle (
page 257) or parking
/
R
(
page 302)
/
Starting the vehicle with the Digital Vehicle
R
Key in the storage compartment (emergency
operation mode) (
page 258)
/
Setting up and managing the Digital Vehicle Key:
Registering the Digital Vehicle Key
R
(
page 145)
/
Manage Digital Vehicle Key (
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Remove Digital Vehicle Key (
R
page 159)
/
page 146)
/
page 147)
/
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