I have a new key fob for a 2012 MB E-class that I bought from MB for a spare. I am looking to purchase a 2012 MB CL550. Can I get the fob reprogrammed to the CL550?

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    Might find this helpful, but as you are considering crossing models perhaps not : mechanics.stackexchange.com/q/3681/10976 – Solar Mike Dec 19 '19 at 13:32
  • @Solar Mike That answer is incorrect and misleading. – narkeleptk Dec 19 '19 at 14:45
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    @narkeleptk and I was hoping they would read your comment on that answer, but since you did not, then a vain hope... – Solar Mike Dec 19 '19 at 14:47
  • @Solar Mike I appreciate that sir I do. I just worry most over look the comments since its an accepted answer. Its a common frustration in my business with misinformation like that so it probably just bothers me a bit too much. – narkeleptk Dec 19 '19 at 14:49

For the most part once Mercedes keys are programmed they are burned to that programming (if you ordered from MB then its pre-programmed already).

While it is possible to unlock the key and reuse it. It is rare and not many have the equipment to do this however. Mostly unlocking is used by locksmiths who want to refurbish used keys for use later. Locksmiths also do not like to use outside of their own supplies because we do not know of its origins. Even if you found someone with the equipment it would likely costs you more to unlock and then program, then to just get a new fob from them all together.

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