Towing vehicle for caravans for European tour

What do you think is a one-year European tour with a trailer and you’re looking forward to the big question which train is suitable for you? My favorite BMW was once an Alhambra because the car has sliding doors and the children like to open the door themselves. In the city, with small parking spaces, sliding doors are worth gold. Now I have read so much bad about the clutch at the Alhambra and am unsure. You don’t really find it used with all-wheel drive. Since we will be on the road for a whole year, the train will be very demanding. The roads in Poland, Italy or Turkey are partly adventurous. (We have time far away from the tourist destinations to look at the “real” country.) Our desired caravan will weigh with extra charge around the 1.8t. My questions to you: Who is driving an Alhambra and caravan without prejudice across the Alps? Does the clutch already have a lot to recommend for Mercedes and also down? Is rear drive so much better? An overlay was simply to buy an older Mercedes or BMW from me as a Laie? Have a good impression?