Opening the bonnet. Fluid levels. HDi engine

Opening the bonnet and checking fluid levels on the Citroën C6 (1st generation) are clearly described and designed to be user-friendly. The chapter shows how to release and safely open the bonnet, with warnings about the risk of burns when the engine is hot. It then gives detailed explanations of the windscreen washer system, engine oil, coolant and brake fluid, including level indicators and quality specifications as per the service booklet. Particularly important: the HDi diesel engines operate at high pressure, so work may only be carried out by trained specialist personnel. With precise safety notes and clear illustrations, this chapter is an indispensable companion for vehicle care.

Opening the bonnet

This operation must only be carried out with the vehicle stationary.

To release, pull the control under the dashboard towards you.

Grip handle A under the edge in the centre of the bonnet and lift.

To close

Lower the bonnet and let it drop from a low height.

Take care when touching lever A if the engine is at operating temperature (risk of burns).

Check that the bonnet is correctly latched.

Fluid levels

Air filter

Follow the instructions in the service booklet.

Windscreen washer and headlamp washer

Preferably use products approved by CITROËN.

Fill capacity: See "Capacities".

Engine coolant

The fluid level must be between the MINI and MAXI marks on the expansion tank.

With the engine at operating temperature, wait at least 15 minutes.

Quality: See "Service booklet".

Never carry out work on the cooling system when the engine is warm.

"+" and "-" terminals for starting with an emergency battery

See "Starting with an emergency battery".

Engine oil

Check the engine oil level at least 30 minutes after switching off the engine, on level ground.

It is normal to top up oil between two services. The manufacturer recommends checking the oil level every 5000 km and topping up if necessary.

Quality: See "Service booklet".

Brake fluid

The fluid level must be between the MINI and MAXI marks on the reservoir.

Quality: See "Service booklet".

If the warning light comes on while driving, stop immediately and contact a CITROËN dealer or a qualified workshop.

Power steering and suspension fluid

Please contact a CITROËN dealer or a qualified workshop to top up the fluid.

Quality: See "Service booklet".

• When working in the engine compartment with the engine warm, the cooling fan may start at any time, even with the engine and ignition switched off.
• Check the engine oil level regularly between scheduled services and before any long journey.

HDi engine

The diesel fuel system is under high pressure:

ALL WORK ON THE SYSTEM IS THEREFORE PROHIBITED.

The HDi engines are distinguished by advanced technology.

All work requires special qualification, which CITROËN dealerships guarantee.

Opening the bonnet and checking fluid levels on the Citroën C6 1st generation are user-friendly and safely designed. The Citroën C6 2005-2012 offers easily accessible check points for engine oil, coolant, brake fluid and windscreen washer fluid, making everyday maintenance easier.

The Citroën C6 1st generation places particular emphasis on safety: warnings protect against injury from hot engine components, and the high-quality technology of the HDi engine requires proper maintenance by qualified personnel.

Frequently Asked Questions

How often should the engine oil level be checked on the Citroën C6 1st generation?

The oil level should be checked every 5000 km and topped up when necessary to avoid engine damage.

Why must I not carry out work on the diesel fuel system?

The system is under high pressure, which poses a serious risk of injury. Only specialists may carry out work.