A friend of mine asked me to reset the radio code of its most loved car. He got the car from his late father, the code is now lost in time. The radio is a Becker Mexico CD 876, very well known to any Mercedes-Benz enthuisiast. Becker used to provide car radios for Mercedes-Benz up to the late 1990s. This one is special, because it was initally ordered with this car (a 1991s 560 SEL, which was a very exensive car at this time). Even Mercedes-Benz or other specialist could not recover the code (which is legal), because the required code chips are no longer available. Besides, this radio was quite expensive. Very expensive. And rare today.
Thinking about a solution I visited the Pololu website. So here wo go, solution found! Thanks for all that stuff, Pololu!
Here it is, the result on YouTube (sorry, remarks in German, same as described here):
I just want to let you know that 50% of all possible codes are entered (this afternoon). This means 5.000 in total! Although the right code is still hiding somewhere in the radio , I am glad (really glad ) that everything still works fine.
I faced some minor problems though: My laptop freezed twice, for whatever reason. Rebooted it and set up everything again. That was easy.
More worrying was the fact, that the radio locked up once. At first I thought that this was due to stucking servos or too few power (I mean the car battery connected to the radio). But that was not the case, so I disconnected it for a while. Since then it works again like before. As of the Pololu hardware: on and on and on and on ......