Reasonable european car for battlewagon/overlanding

Hi all, I'm looking for a car in which it will be possible to spend the night in the trunk relatively comfortably after folding the seats. I am also thinking of modifying it slightly and making it a "soft overlander". I primarily care about a manual transmission. I will add that I am from Europe so all the popular American wagons will be hard to reach for me. My types of cars are:

  • Audi A4 Quattro
  • BMW e46 Touring
  • Volvo 850/V50
  • Passat B4
  • Peugeot 406
  • Golf 4
  • Skoda Octavia
  • Renault Kangoo
  • Peugeot Partner
  • Citroen berlingo
  • Vw caddy
  • Suzuki Grand Vitara
  • Honda CRV

Let me know which one you have dealt with and which one performs relatively best. I will be thankful for any advice.