Thank god I'm not alone.
I have a 2.0 TDI
Leon Mk2 just done 50k and had my belts replaced at 44k. It does this odd clicking, tapping noise when the engine gets hot, and especially when i'm stop starting in traffic. I can't tell you how much I HATE this ruddy noise. I take pride in my car and it makes me want to sell it and get a petrol, such is its annoyance!
Did anyone get to the bottom of this?