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Well, that's a bunch to digest. I have all the info from MB regarding the smartkey. 200K starts I believe is correct. It would take a long time to reach that many starts. In class we sort of figured out that in normal use it would take probably more years than the car will last before the key was out of codes, unless it ends up in some museum.
If you start the car 10 times a day, every day of the year, that is a lifespan of almost 55 years before you run out of codes. And we figured 10 starts a day is at least average, probably above average (the 10 starts seems right but then figure that there are days or even weeks when a car is not used due to vacations, etc). Plus you have 2 or 3 keys with the car.
It is a "rolling code" if you want to consider it that way, to me not really in the common sense of rolling code though. It was described to the class as a "challenge and response" type of activity. To simplify, when you insert the key, the eis will challenge the smartkey for example "9 times 9" and the key will respond "81". It's no that the key calculates the response, it is already programmed to give that reply (the correct reply) on that start attempt.
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