The only thing to go wrong is a badly balanced wheel on the of-side rear of the vehicle, I am yet to get this repaired.
I travel 40 to 60 miles per day in this car and can get 400 miles out of a tank, easily, and it only costs about £30-00 to fill up.
It has electric windows, sunroof and mirrors and power steering and remote central locking. More gadgets than you would expect to get in a car of this age and class.
The car looks almost brand new once washed.
Your review on the Citroen ZX Advantage 1.9D were 100% accurate, the car is unbelievably reliable, and superb on the economy, however I actually get 490 miles from a tank (average) and once I got 525 miles. I do fill the car up with patients i.e. allow the diesel froth to settle then fill up a bit more.
I love my ZX, I've had it since it was 2 years old, I bought it 5 years back and it sails through every MOT, never rusts, and always polished up beautifully as the car is polar white, so it comes up crisp & clean.
I've no intention what so ever in getting rod of it, so I'll keep it going with new magnetic oil every 6000 and slick 50 in the gearbox.