hi, i have a 1.8 vauxhall astra convertible, i have noticed that my cental locking goes out of sync in my boot and also affects my hood which has no power. it resolves it's self in time but means i have to hope and wait for it to do so. i have taken it to vauxhall but they say i will have to bring it back when it's out of sync for them to diagnose it. any ideas? thanks