Mercedes-Benz CLA Owner's Manual page 86

If you open the boot lid from outside, the boot lid
is automatically unlocked.
Problems with KEYLESS-GO
Problem
You can no longer lock or unlock the
vehicle using KEYLESS-GO.
Activating/deactivating the automatic lock‐
ing feature
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 key functions have been deactivated (
R
The key battery is weak or discharged.
R
There is interference from a powerful radio signal source.
R
The key is faulty.
R
Activate the key functions (
#
Check the battery using the battery check lamp and replace if necessary (
#
Use the emergency key to unlock or lock the vehicle (
#
Have the vehicle and key checked at a qualified specialist workshop.
#
M M Solutions
page 77).
/
page 77).
/
page 78).
/
Opening and closing 83
page 78).
/