Mercedes-Benz A-Class Operator's Manual page 67

Problem
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
The SmartKey is defective.
R
Activate KEYLESS-GO ( page 59).
→
#
Check the battery using the battery check lamp and replace if necessary (
#
Use the mechanical key to unlock or lock the vehicle (
#
Have the vehicle and SmartKey checked at a qualified specialist workshop.
#
M M Solutions
page 60).
→
To activate: press and hold button
#
approximately five seconds until an acoustic
signal sounds.
To deactivate: press and hold button
#
approximately five seconds until an acoustic
signal sounds.
When the vehicle is locked automatically, the
indicator lamp in button
There is a danger of being locked out if the func‐
tion is activated:
While the vehicle is being tow started/
R
pushed.
On a roller dynamometer.
R
65
Opening and closing
page 60).
→
2 for
1 for
2 lights up.