What is the biggest combo in the world?

Tach people! I would like to know, but only for fun, what is probably the biggest combo ever built in the world. I searched the net, but did not find anything reasonable. I am interested in the volume of the trunk, as well as the rest of the dimensions. I just start and guess that the Caprice Station Wagon is definitely among the highest ranked ones. How about the wagons that Ford built in the 70s? Those were also very nice ships. Always with Expertise, data and opinions!