We are just getting the 500L over here, and Europe is soon getting a longer 7 seat version of that car.
So as of now, this is the largest car sold under the name 500. It is about 8 inches longer than the regular 500L.
Thankfully, the only engine offered in the US version of the 500L is the 1.4 Liter Turbo with 160HP.
But in Europe, where the "Living" will stay, they offer a 95HP version of the 1.4 Liter as a base engine.
Just imagine how fun that is to drive around with 7 people on board....