Mercedes-Benz S-Class 2020 Operator's Manual page 73

Problems with KEYLESS-GO
Problem
You can no longer lock or unlock the
vehicle using KEYLESS-GO.
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.
Possible causes/consequences and
Possible causes:
The SmartKey functions have been deactivated (
R
The SmartKey battery is weak or discharged.
R
There is interference from a powerful radio signal source.
R
The SmartKey is faulty.
R
Activate the SmartKey functions (
#
Check the battery using the indicator lamp and replace if necessary (
#
Use the emergency key to unlock or lock the vehicle (
#
Have the vehicle and SmartKey checked at a qualified specialist workshop.
#
M M Solutions
page 65).
/
page 65).
/
page 66).
/
Opening and closing 71
page 66).
/