For the second time in as many years, I found that most of the screws that hold the engine compartment cover in place were loose (some shown in red circles in the attached photo). If you own a C8 HTC, you may want to check the screws as several on my car were about to come completely out. I'll check the screws again in a couple of months and I find that the screws have loosen off again, I'll use a bit of loctite to secure them.