.
It's such common issue on the Mk5 that my VW dealer holds the part in stock.
I had the problem when not being able to close my bonnet at the start of an expensive private track day in Germany. With Hurdy's help, after checking fluids we managed to close the bonnet and decided the bonnet would not be opened again until I got home to my VW dealer!
Apart from a new bonnet catch it gave me the perfect excuse to fit AeroCatches and so 'RED' now wears both belt and braces and I feel much more secure, especially as my bonnet is carbonfibre.