Mine is June 2010 made Punto. Even I used to hear slight noise from left door area. But I wasn't sure and sometimes even felt that it could be the AC pipe near the left front door (i.e. from the AC vent on the extreme left). Some rattling noise is common from most cars. Even the premium SUV Endeavour was making lots of rattling noises from many directions when I sat in one 2-3 months back. And that car belonged to a neurosurgeon, thus never been to off roading etc.