The arrows will flash in unison with the exterior turn signal, when using the turn signal lever.
See also:
At the filling station
Make sure that the left-hand sliding side door is completely closed before
refueling. You could damage the door and the sliding lock system which comes into
play when the fuel flap is open.
Y ...
Right-hand direction indicator
(green - intermittent)
The warning light turns on when the direction indicator control lever is moved
upwards or, together with the left indicator, when the hazard warning light button
is press ...
Activation
The sensors are automatically activated when the reverse gear is engaged.
The sound produced by the acoustic alarm becomes louder when the distance between
the car and the obstacle decreases. ...