Large family car wanted

We are 2 adults and 3 children, the smallest one needs a child seat. That means in the back 3 full seats and some legroom in the middle should already be, 7 seats would be ideal, but are not a must. We drive in the year 20-25,000km, so it should be a diesel again. The car should have besides a large trunk, not very little performance and a few extras. We are not looking for a new car, rather so from year 09/10, a few km of course can be on it. I hope I haven’t forgotten anything and am looking forward to your suggestions.