If you're going to pay Xantia V6 consumption etc you might as well have a Jaguar or Mercedes ?
I don't know Jags or Mercs, although I've been in a few Mercs as taxis and found them soulless and the ride was not a patch on a citroen.you've got a good wedge of cash invested in the M/J as compared to the Xant.
I would rather I had less cash tied up in a motor. In actual cash, you lose more on a Merc than a Citroen (when buying new that is). To me, the Xantia has at least some persona....but each to his own really.