To add to this, I've had a few issues too...
same knocking, crunching from the front... My local dealer re-torqued the top mounts, which resolved it, but I noticed yesterday it's back again... Seems the strut tops keep coming loose in my case
The other is the gearbox, every now and again in 'race' the gear changes become quite sluggish on down changes, as if it's getting too hot or something... I don't have the RS monitor otherwise I'd be able to check if heat was an issue. My dealer couldn't find any issues when I took it in... Strange!