A few weeks ago I posted saying I had a rattle/knocking/tapping in my new Corolla TS, the noise sounded as though it was coming from the area behind the driver. I thought I had sorted it with a quick squirt of silicon on the bump stops in the tailgate but unfortunately it's back and worse than ever. I have traced it back to the sliding seat belt height adjusters in the central pillar. I have pushed a small wooden plug between the plastic that slides and the plastic pillar surround and that'