I`m not sure about your particular model but on several of the Blaupunkts, the 4 extractor holes are protected by small screws . These have to be unscrewed first using a small Allen Key, then a pair of the normal wire DIN style extractors are used ( Cheap on Ebay) .
See the type here http://www.incaripod.com/Brand/Radio_Removal_Tools
RegWorts, May 2008
