Mercedes-Benz C-Class Coupe 2019 Operator's Manual page 70

68 Opening and closing
Problems with KEYLESS-GO
Problem
You can no longer lock or unlock the
vehicle using KEYLESS-GO.
To unlock the vehicle: touch the inner sur‐
#
face of the door handle.
To lock the vehicle: touch sensor surface
#
1 or 2.
Convenience closing: touch recessed sen‐
#
sor surface 2 until the closing procedure is
complete.
%
Further information on convenience closing
( page 78).
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If you open the trunk lid from outside it is auto‐
matically unlocked.
Possible causes/consequences and
Possible causes are:
The SmartKey functions have been deactivated (
R
The SmartKey battery is discharged or nearly discharged.
R
There is interference from a powerful radio signal source.
R
M M Solutions
page 63).
/