One of the clips that held the front undershield in place snapped off my Audi A4, so I designed this M5 nut. It's been designed so you can use the tire iron that comes with the spare wheel (which I also use to open the ad blue refill cap) to tighten it up. I carry a couple of spare in my glove box but not needed to use them as yet!
The photos are from the first (test fit) design that used a pair of pilers to fasten it up.
The author marked this model as their own original creation.