Being a car nut, I thought the exact same thing. "The same residual value percentage as the iconic Mercedes S Class, one of the finest premium sedans in the world" initially hit me as an inside joke, considering how easy it is to buy a 12-cylinder Merecedes-Benz (CL, SL, or S) for $20K after about 6-years, on account on their absolutely brutal repair costs. The 8-cylinder S-class resale tends to tank, on how often they're leased and tend to flood the market after 3 to 4 years.
Lamborghini, Aston Martin, and Maserati fall into the same bucket on the sporty/sports GT car side of the fence. If you want great resale value, you buy a Lexus ES -- on account of everyone wants a quiet, boring, comfortable, reliable (parts-bin to a large extent) mid-size sedan that they too can afford to repair, insure and keep running.
Dealers only sell new autos to capture the service business, trade-in inventory and manufacturer floor plan financing. In the case of Maserati, servicing costs are inline with Ferrari making it a service cash cow!
In 1993, Fiat acquired Maserati from De Tomaso, but a 50% stake was sold to Ferrari in 1997 -- however, at the time, Ferrari had already been under Fiat's umbrella as a sister brand (since 1969).
Lamborghini, Aston Martin, and Maserati fall into the same bucket on the sporty/sports GT car side of the fence. If you want great resale value, you buy a Lexus ES -- on account of everyone wants a quiet, boring, comfortable, reliable (parts-bin to a large extent) mid-size sedan that they too can afford to repair, insure and keep running.