Hi I don't know if anyone can come up with a solution to this problem? I have an altea on 54 plate the radio has developed a mind of its own. When the car is parked and locked (so alarm is on and the ignition off). The radio comes on at full volume. This of course causes a voltage drop if not notice which sets the alarm off. The car has been to the seat dealer who replaced a circuit board, but at the moment every few days the radio just turns itself on. Went back to when radio turned on again but it does not do it in garage so Seat dealer cannot find wrong.