I have a o6 panda dynamic which i got in march and it has done 3,000 miles while driving it the other day it made this funny shuttering noise from the chassic its has done this about 3 or 4 times at different speeds now the car is booked in to do a another job at the garage so they are looking at that to but as it does it ever now and then it will be hard to find has anyone else had this happen to them ?