I've bought a 09 2.0D about two weeks back. When I got it I knew it needed at least 1 wheel bearing on the real which the garage replaced before collection. However, after I had collected it I noticed another faint whine coming from the rear... we decided to replace the bearing on the other side and that solved the issue.
Now thought, only a few days later I'm experiencing a very similar noise from the front... Surely not another bearing! But you're issue sounds similar.