CITROËN c4 picasso 2006 Owner's Manual page 111

V E N T I L A T I O N - H E A T I N G -
A I R C O N D I T I O N I N G
- Heating /Manual air conditioning
To make the best use of the system, we recommend :
III
- Automatic air conditioning
109
With automatic air conditioning, you are recommended to choose AUTO operation.