We have The Adria Altea DT and its fab. Roomy enough as well!
Haven't heard of a DK Adora only a Altea or Sportline DK. Anyway check out this thread on here, its fantastic, full of ideas regardless of what Model you have! And Welcome to the Adria Family
What weight is the Adora (must be a new model 542DK Adora?)
3 series diesel would be fine for the Altea models at 1300kg max but you would ideally need a 5 series or bigger for vans bigger than that if sticking with BMW.