check the anti rollbar drop links they may feel ok when you try & move them by hand but will knock badly over bumps if worn, best remove one end so its loose and then check the balljoints for play ,these are a common cause of knocking on citroens,had 4 & had to do every one ,i would replace both of them if one is worn ,easy enough job & they are only about 12 quid each from euro car parts
bob k, May 2009
