Why has my lane assist stopped working?

[ChrisKe]

Why has my lane assist stopped working?

I have Citroen C5 Aircross Hybrid Auto 2023 and just noticed the other day it hasn't corrected me for a while. There are two buttons and I can't remember the default position but when I switch one in it says, car must be in cruise? The indicator on the dash is greyed out and the book says it should be green when active. I know you have to be travelling over a certain speed but it used to work without being in cruise?
Any ideas?

[GiveMeABreak]

Re-check conditions for activation:

Operating conditions

• Adaptive cruise control active.
• Vehicle speed above 19 mph (30 km/h).
• Traffic lane marked out by lines on both sides.
• ESC system operational.
• ASR/CDS systems activated.
• No trailer detected.
• No 'space-saver' spare wheel in use.
• Vehicle not subject to strong lateral acceleration.
• Direction indicators off upon activation of the system.

All on page 124 of your manual.

Also check there is not grease or road traffic file on the camera area of the windscreen.