My suggestion : Skoda Superb (volkswagon audi engines etc)without the audi image.
Larger than a 5 series; estate and 4x4 available if you want. Excellent ride quality, 50 plus MPG even with the 170bhp version. Really roomy inside...I think they are on the A5 or A6 floor plan.
Just been to the French alps in mine , 5 of us, roof box 7 bikes, effortless.
On our 4th skoda---a much older superb, a yeti 4x4 (also excellent) now have Octavia for wife and superb estate for me.