My 2007 seat Leon TDI appears to have developed a problem with the speed dependent central locking. Whilst driving at any speed even on motorways the doors lock unlock regularly eg 5 or 6 times in a ten second period. During this time the radio may switch off or wipers will stop . The problem may then stop for say 10 mins and then start again. Anyone else experienced this type of thing before and if so how was it solved. Thanks