Mercedes-Benz GLC : Doors / Activating/deactivating the automatic locking feature
The vehicle is locked automatically when the
ignition is switched on and the wheels are turning
faster than walking pace.

To activate: press and
hold button
for
approximately five seconds until an acoustic
signal sounds.
To deactivate: press and
hold button
for
approximately five seconds until an acoustic
signal sounds.
In the following situations, there is a danger of
being locked out when the function is activated:
- While the vehicle is being tow started/
pushed.
- If the vehicle is being tested on a roller dynamometer.
You can no longer lock or unlock the vehicle
using KEYLESS-GO
Possible causes:
The SmartKey functions have been deactivated.
The SmartKey battery is weak or discharged...
If you wish to lock the vehicle entirely using
the emergency key, first press the button for
locking from the inside while the driver's
door is open...
Other information:
WARNING Risk of injury from plastic
parts breaking off after the use of solvent-
based care products
Care and cleaning products containing solvents
can cause surfaces in the cockpit to
become porous. When the airbags are
deployed, plastic parts may break away...
You can no longer lock or unlock the vehicle
Possible causes:
The SmartKey battery is weak or discharged.
The SmartKey is faulty.
Check the battery using the indicator lamp.
Replace the SmartKey battery, if necessary.
Use the emergency key to lock or unlock...