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150 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 146).
/
Replace the key battery, if necessary
#
(
page 148).
/
Use the replacement key.
#
Use the emergency key to lock or unlock
#
(
page 165).
/
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.
For information on setting up a user account and
activating the "Digital Vehicle Key" service, visit
https://www.mercedes.me.
F297 0017 02
The Digital Vehicle Key can then be used for the
following functions:
Locking/unlocking the vehicle with KEYLESS-
R
GO (
page 157)
/
Locking and unlocking the vehicle with the
R
NFC function (
page 154)
/
HANDS-FREE ACCESS function (
R
Convenience closing (closing the vehicle from
R
outside) (
page 175)
/
Anti-theft protection (
page 180)
/
R
Starting the vehicle (
page 280) or parking
/
R
(
page 324)
/
Starting the vehicle with the digital vehicle key
R
in the storage compartment (emergency
mode) (
page 282)
/
Set up and manage the digital vehicle key:
Registering the digital vehicle key
R
(
page 151)
/
Manage digital vehicle key (
/
R
Remove digital vehicle key (
/
R
page 170)
/
page 152)
page 153)
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