Thank you.
I would be driving along and get a warning that the bonnet was open. When dropping the lid, it would not click shut, I would then have to apply an extra bit of pressure to close it. This went on for a bit - every time I went on a bumpy road, the bonnet would open with the warning.
I did notice after my warranty expired and this started happening that there was a lot of grease on the latch, so it looked like this had been an issue before I bought the car.
About 3 weeks ago, I wiggled a screwdriver in there (after seeing something on Youtube) and I was able to close it on the drop. Since then, the bonnet has not popped up but I keep getting an 'alarm was activated message' when I start the car. My windscreen fluid needed filling yesterday so I had to open the bonnet for the first time since I closed it properly and now it won't close without extra pressure after dropping it. There is a vertical pointy thing that is supposed to push in and out that seems very seized and grease doesn't help.
I decided to just get another unit which was cheap enough and I'm going to try and replace it myself. I figure if you can put computers together, you should be able to apply it to something like this with decent instruction.