Citroen C4 HD User Manual since 2008

I need to get the owner's manual for the 2008 Citroen C4 HDI (gasoline version) because without it, I'm having trouble operating the car's components, especially the steering wheel controls, cruise control, and the displays on the stereo and other screens. It's quite complicated because of all the functions it has. I accidentally switched the stereo to economy mode, and I don't want to mess with anything else and risk breaking something. I look forward to your reply. Thank you.