1.0, battery constantly empty, relay-410 ratters without ignition

Hello, In the Arosa Forum is unfortunately dead pants, and since the Arosa is identical to the Lupo, I ask the question again here. Our second car a Seat Arosa Bj.1999, 1.0 , 50PS constantly sucks the battery empty. When you get into the car you hear the Relai 410 ratter although keys are not in the ignition lock. So the Relai has power without ignition. Can it be because the Relai is defective and no longer shuts down or is the problem to look elsewhere?