i think i may have a problem with mine too. Whenever i get 2 people in the back the car scrapes on speedbumps. Checked under the car and everything is all intact (exhaust, underbody cover etc). its annoying as i bought the car so i can get people in the back rather than my old slammed polo.
Its a 2005 Golf 1.9 TDi Sport.
First i suspected its maybe because the suspension is a bit low as its a sport model, but my brother had the exact same spec and his never scraped.
Any thoughts peeps?