Hill start assist
The system briefly holds your vehicle (about 2 seconds) when starting on a slope, while you move your foot from the brake pedal to the accelerator pedal.
This function is only active when:
- the vehicle has been brought fully to a standstill with your foot on the brake pedal,
- certain slope conditions are met,
- the driver's door is closed.
The hill start assist function cannot be deactivated.

Operation
On an uphill slope, vehicle stationary, the vehicle is held briefly as soon as you release the brake pedal:
On a downhill slope, vehicle stationary and reverse engaged, the vehicle is held briefly as soon as you release the brake pedal.
- if you are in automated mode (position A) or in manual mode (position M) with the automated manual gearbox.
Do not get out of the vehicle during the temporary hold phase of the hill start assist.
If you must get out of the vehicle with the engine running, apply the parking brake manually, then check that the parking brake indicator is steadily lit on the instrument cluster.
Malfunction

When a system fault occurs, these indicators light up.
Consult the CITROËN network or a qualified workshop to have the system checked.
Test yourself
A quick Citroen C1 quiz: every answer comes with an explanation and a link to the manual page.