Some time Reverse camera not working. Some time sony sounds system is Clear sound work not...zoom sounds... Some time Display not work. only black screen & car on and off. But not working after car half an hour. Wait and car is on and work... What is problem display. I don't know... sometimes working sometimes not working.... my car is auto not work auto gear + 30 to 35 but not gear changing. And this time 30 to 35 car engine Is humming sound very high creative.