If you got the safety package make sure whatever seat cover you choose is designed to work correctly with the side airbags. These come out of the seat back and if the seat cover is not designed to come apart at the right location you end up with no protection.

For the rear cargo area I took an old liner from our previous Volvo wagon and cut it to fit. It's not a perfect solution but better than nothing when the German Shepard is along for the ride.