Hans: Regarding the "data card", I have the warranty plate (a much out-of-date technology) Addressograph plate, which I had issued in my name 45 years ago. Since the warranty was still valid (11 months remaining on the original 24 month warranty), I felt fully justified in having it in my name - and Mercedes willingly re-issued it. As for the "data card", could you describe it? I have everything that came with the car (most of it still in the grey leather pouch with the owners manual, etc. Voluminous files, documenting myriad service jobs covering the 165,000 that I have logged in her last 45 years, may also have some other papers. I don't expect MB Classic, or any one else to be able to provide a working key duplicate, just a blank which I should be able to get recut, using my orignal, much like any other old-style key. My key is still functioning, but the plastic "head" has broken off. Any thoughts?