Well here's one that is easy to replicate.

1st gear, plulling away slowly, slower than you would just ticking over in 1st - I mean slow enough to have to ride the clutch a little. Anyway, while you're riding the clutch like that, if you suddenly push the clutch pedal back in, I get a horrible clunking and rattling noise from underneath the car. Not sure if it's just not meant to have that done to it or if something is loose. Noticed it in heavy traffic today. Never noticed anything like that on the last car. 09MY FL2 Td4 XS, Style Pack, Privacy Glass, Martinique Blue.. oh so very blue..

Mine doesnt do that.

could be exhaust/heatshield/something else loose underneath?

Hmm.. this is getting annoying. Finding myself doing it more and more just to prove it's still there. Definitiely heavier than a heatshield.. sounds liek something mechanical. Time for a visit to thon thar dealer methinks. Only 2 weeks old too..  09MY FL2 Td4 XS, Style Pack, Privacy Glass, Martinique Blue.. oh so very blue..