Whilst driving along today and looking very smug that my 4wd car was the only car that could get out of our flats car park, suddenly a loud scraping/screeching noise began coming from the front end. It did this all the way home (apart from about two miles where it fell silent) to varying degree's of loudness - but all easily audible from outside and inside the car.
It doesn't seem to be engine related as it doesn't change with revs, it also doesn't change when I depress the brakes. The only ways to alter the sound are by varying speed and by turning left quickly (shifting the weight to the offside). I've had a quick look under each wheel arch but can't see anything obviously wrong, I've also had a look at the outer face of each disc but can't see any heavy scoring. My investigations have ended there as i'm not prepared to lie in 6 inches of snow to check any further!
I'm hoping it's just a stone stuck in the brakes somewhere non-visible but I would have expected the sound to change if I used the brakes? Awesome GTI recently serviced the car and did mention that the front discs would need changing soon as they had quite a bit of wear.
Any ideas? It's worth noting that the car drives fine apart from the aforementioned noise.