Discovered I could adjust these just now as I'm trying to find the cause of the noise from the boot. Why would these be adjustable and should they be screwed all the way in? I've put them to the position I think they were in before I fiddled with them.
SRi 1.4 Turbo (150) Auto in Summit White. Parking sensors and Winter Pack
Aren't they adjustable to ensure correct fitment of the boot lid or bonnet, you will probably have some there too. I would wind them out until the boot doesn't shut, then wind them in a little. Have a look at the shutlines to make sure all is square
Luxor Blue Insignia Elite Nav ST CDTi 163 Emerald Green Astra Elite CDTi 110 with Parking Pack, Driver Pack , Intellilux and Power Drivers Seat