I had a Citroen C6 for two years. Everything was fantastic about it apart from the cost of spares, servicing and weird electrical gremlins - so typical French really. When it was working it was a lovely car. Got fed up of it and changed to a Mercedes E250 diesel coupe. 50 mpg easy to achieve, cheaper to maintain and has never let me down. Did make sure I went for the small(ish) 17inch alloys though. The 18's and 19's that a lot of people upgrade to generate far more road noise, are easy to damage and the tyres cost a fortune.