See also:

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. ...

Low battery charge
Turning the key to MAR the warning light on the dial turns on, but it should go out as soon as the engine is started (with the engine running at idle speed a brief delay in going out is allowed) ...

Inefficient abs system
(amber) Turning the ignition key to MAR the warning light turns on, but it should go off after few seconds. The warning light turns on when the system is inefficient or unavailable. In this ca ...