is the original source. The conversation on that thread includes:
The problem? Most owners lose the little "Radio Code" card from the glovebox within the first year of ownership. By the time the battery dies eight years later, that card is long gone. Opel Blaupunkt CAR300 code generator - MHH AUTO - Page 1
: Automotive forums and communities can be a great resource. Users often share their experiences and solutions for common problems, including issues with car radios. is the original source
The CAR300 is part of a long lineage of car radios produced by Blaupunkt (a German electronics company) specifically for General Motors' European division, Opel. You will find this unit in: GM0300W1234567). MHH AUTO Community Role
followed by a letter and seven or eight digits (e.g., GM0300W1234567). MHH AUTO Community Role