Hi, revisiting this - went to open the bonnet today and nothing.. 2006 facelift. Pulled the leaver in the footwell and it was really loose with no tension. took out kidney grill and using the manual release also has no effect - tried wd40 around the central mechanism and 'bouncing'. I believe that the issue is the side latch on the driver's side (UK) as a couple of days ago I noticed the bonnet was a little loose so gave it a push-down and seemed to click into place. As such this catch being the one at fault is by belief - potentially seized before pushing home, and the release cable has now remained slack? Does anyone know if it is possible to access from the wheel arch? Or come across this before and has a knack.
This link should be a screenshot of the area I think is unhappy - links rather than pictures as first post and still working it out.
https://share.icloud.com/photos/0Mekh1LxNL3SyyWMhuY_j8_RQ
And seeing as everyone likes photos - here's my restoration project https://share.icloud.com/photos/0NZAvcV7TRAxwImPOO4zQIWYA