Hurrah for Adventure!(1970)

Two Parisians and inseparable friends, Alexandre and Philippe, decide to spend their vacations in Palma. Philippe arrives by car, accompanied by his young wife, while the flighty Alexandre has hired a blonde hitchhiker. But what a surprise to find the villa, rented by correspondence, inhabited by strange and worrying occupants... Soon mistaken for secret agents, Philippe and Alexandre embark on extravagant adventures involving a mysterious shipment of gold.