Please can anyone tell me if a Blaupunkt car 300 will fit into my Corsa that used to have a Grundig car 200. The Grundig has packed up and Ihave slotted in a Blaupunkt from an Astra same year model 1996. The code light flashes but SAFE comes up on the dis[play panel in the dash. Is it possible to overcome this. Also can a new locking cover cap tool be purchased as I have lost mine from the alloys. They are original vauxhall fit on a 1.4i Premier. Any help would be appreciated.