coolant reservoir Citroen DS5 HYBRID4 RHD 2014 1.G Owner's Manual

Coolant temperature
gauge
With the hybrid system active: - in zone A , the temperature is correct, - in zone B , the temperature is too high; the central STOP warning lamp comes on, accompanied by an audible signal and a message in the instrument panel screen. You must stop as soon as it is safe to do so. Wait a few minutes before switching off the engine. Contact a CITROËN dealer or a qualified workshop.
After driving for a few minutes, the temperature and pressure in the cooling system increase. To top up the level:  wait for the engine to cool,  unscrew the cap by two turns to allow the pressure to drop,  when the pressure has dropped, remove the cap,  top up the level to the "MA X" mark.
Be aware of the risk of burns when topping up the cooling system. Do not fill above the maximum level (indicated on the reservoir).

The various caps and covers allow access for checking the levels of the various fluids, for replacing certain components and for priming the fuel system.
Diesel engine
1. Power steering reservoir. 2. Screenwash and headlamp wash reservoir. 3. Coolant reservoir. 4. Brake fluid reservoir. 5. Battery / Fuses. 6. Fusebox. 7. Air filter. 8. Engine oil dipstick. 9. Engine oil filler cap. 10. Priming pump. 11. Bleed screw. HDi 160 PEF 6- SPEED ELECTRONIC GEARBOX