Have got a 2012 superb greenline with only 6700 miles on the clock. This evening the most horrendous screeching high pitched grinding noise started coming from the passenger side front wheel. Thought it was brakes so dabbed them soft and hard - noise didn't stop. Thought its suspension but when you lean on the bonnet there is no noise have looked with a torch and can't see anything obvious - like a stone caught between calliper and alloy for instance. Stopped in car park and checked. It's s