Hello, the key of my W123 (1983 200 gasoline) is broken, so the black plastic mount and so the key falls from the key ring. The easiest way would be to get to the key service but there are only ugly blanks. An original key is available at Mercedes for 27 euros against presentation of the ID card and the bill. As far as so good, a few hours later the dealer calls, he needs the data card to order my car to the key. I have in the origi nal service booklet in the back a page with many numbers, among other things the tire size but there I can discover nothing that looks like this 3 digit number and also no indication to the key manufacturer. My dealer says he can request a data card for 150 Euro ! Does anyone have an idea where I get this number or an original blank? Thank you for your help