Unusual sounds in the 2010 Jetta Sportwagon

turbo yes indeed, may have sucked a gasket to the vanes . did you have the filter cover off? an o shaped gasket although made of harmless material can be pulled in if not careful and brush the spinning vanes,just remove the plastic ducts and pluck it out, you'll see an improved boost also

take it back- start over- and forget the whole diesel/turbo thing