A potential buyer for my vts pointed a potential discrepancy. The 2005 and 2006 C4's are quoted as having 4 star ANCAP rating on the redbook website yet from 2007 onwards they are rated as 5 stars. If you look at ANCAP's own website and find their reports you get 5 stars for even base C4 SX from 2005. EuroNCAP says the same thing 5-stars.