First things first....It is considered rude to use all caps for your comments. You will get much better results if you just capitalize the proper letters.
Secondly, this is your first post, so you need to first state what you are attempting and why. Were you just replacing batteries or trying to program a new key ? If you have a dealer or a reputable MB shop around, they could get you squared away.
W163 keys can be problematic. If you have a working one (or better yet, two!) treat them with care....
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