What's a good mid-size station wagon to buy?

I am looking to buy a mid-size station wagon as old as 2012. I have been looking at the Ford Mondeo and Holden Cruze, both with diesel motors. I have heard that the Mondeo's have had problems with their transmissions. Can you advise if this problem was widespread? Would you choose one of the above cars over the other? Can you recommend any other vehicles that would fall into the same category and price range?