Yea I had the same problem, took it back and the dealer tightend some stuff and said that somtimes the protective wax on interior pannels causes friction noise when in contact with each other a drop of sun of a gun takes it out.
I strongly agree with you, I use the range of auto glym products from washing to the extra gloss finish and you can see the difference, tak it to a filling station at night and you will see the shine :)