philbathurst wrote:

this might help others,
I eventually stumbled across the option "auto parking aid" in one of the main menus, with it set to "on" the front parking sensors automatically operate when speed under 10mph issue resolved,
but there is no mention of this option in the online handbook

I'm not hijacking just sharing some amusing irony. My sensors as others have suggested don't activate when going forward net result I scraped my bumper both sides and had to have it sprayed. Now I guess one of the sensors has packed up so when I start up I get the noise and "parking aid unavailable" on screen. Where was it when I needed it - the dustbin and fence appeared to be unscathed as I silently and slowly touched them  Geoff