See also:

12 V accessories socket
To connect a 12 V accessory (max power: 120 Watts), remove the cover and connect a suitable adaptor. ...

Heating/ventilation
Manual control panel Electric control panel ...

Diesel engines HDi 110 - HDi 138 (with particle filter)
1. Screen wash and headlamp wash reservoir. 2. Power steering fluid or power steering and suspension fluid reservoir. 3. Engine coolant reservoir. 4. Engine oil gauge. 5. Engine oil topping-up. ...