Haggerty bases their list on recent registration and insurance history. Four of the top 25 are Benz's. But I'd be careful about boasting about a top 25 list where three of the 25 were Ford Bronco, two were GMC Jimmy, and one was a Ford pickup truck.
https://www.hagerty.com/articles-videos/articles/2019/11/27/25-hottest-collector-vehicles-heading-into-winter-2019