Hi everyone, please can anyone help with this i have a c3 exclusive 16 hdi it is an 03 registration about a month old, it has been back to the dealer 5 times now for a knocking/rattle from the o/s/f this only seems to occur if you go over say a manhole cover, a speed bump, or a succession of bumps quickly it sounds like somethings very loose underneath it just sounds like a banging/rattle noise dealer have heard this but cannot locate where coming from very worrying!! theyv have changed the suspension strut and top mount and tightened everything up, they cannot see anything wrong its going back in for them to keep it for a week while they consult citroen technical, anyone had same problem?? please help!