Mercedes-Benz S-Class Cabriolet 2017, Owner'S Manual

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Problems with KEYLESS-GO
Problem
Possible causes/consequences and M M Solutions
You can no longer lock or unlock the
vehicle using KEYLESS-GO.
Possible causes:
R
The key battery is discharged or nearly discharged.
R
There is interference from a powerful radio signal source.
R
The key is faulty.
#
Check the battery using the battery check lamp and replace if necessary (
→
page 65).
#
Use the emergency key to lock or unlock the vehicle (
→
page 65).
#
Have the vehicle and key checked at a qualified specialist workshop.
Switching the automatic locking feature
on/off
The vehicle is locked automatically when the
ignition is switched on and the wheels are turn‐
ing faster than walking pace.
Opening and closing 71