1 Leaving Malaga airport go towards Algeciras/Cadiz until you get to the second exit into Puerto Banus.  It is easier and faster to take the toll road AP-7 But the coastal highway A-7 is more scenic and a nice ride. There are signs for Puerto Banus on both routes.
2 There are two exits to Puerto Banus whether coming on road AP-7 or A-7. Do not take the first exit but pass the large departmentstore El Corte Inglés on the left side and soon thereafter exit to the right for Puerto Banus.
3 Keep right passing under an overpass and coming to a traffic circle, take the second exit (almost straight ahead from where you are coming) onto Anvenida Playas del Duque. (if you find yourself going towards the marina you have taken the 3rd exit).
4 Continue straight on Avenida del Playas del Duque passing the very large condominium complex Playas del Duque. In the next traffic circle keep left and the entrance to Andalucia del Mar is on the right.