I can't find the ADAC set plans (which is worrying in!), but looking at the 4411 delivery van the wheels and axles look the same as for the little City car the part number Martin gives for the wheels and axle for your car also appear for the delivery van. (again, there is no separate part number for the tyre.) As the 4411 delivery van is basically the same as the pizza delivery van in the DS catalogue, you should be able to get a replacement form UK DS, but it will be axle, wheels and tyres.