A new car has to come

So I open up a new topic again because the conditions have changed a little bit. There is a Hyundai I30 which in February to the Tüv but I now have to put in again about 500 euros, which however does not want to be made any more (coxial joints have to be made. From the local workshop was told to us it is still worth about 1500 euros. Now to what I am looking for. Car for family (parents + 1 child and the pram ) A combo (European), up to 50,000 km (the less the better), 150 PS should have it already as a gasoline engine, year of construction as young as possible halt . With the equipment is the parking aid back important to me, board computer (possibly with Navi), USB connection. Budget is about the 20,000 Euro. Now the question about the old car, on the Internet private tick or at the hands where I buy in payment ? And now I look forward to your suggestions about the new car.