I traded my '00 several years ago and passed along all of my maintenance records, the recall letter, and the like to the new owner. I no longer have the document to send you. The documents sent out in the U.S. were sent under U.S. law, and would not apply to other countries.
You have obviously been doing your research; I applaud you for that. The problem with the harmonic balancer (also called a belt tensioner) was that it had two metal components joined by a rubber damper; the rubber damper would separate, and the metal sections would come apart. Searching my bookmarks, I was able to locate this informative post: http://www.benzworld.org/forums/gene...ey-points.html
The recall was only for certain VINs and it was to have the part inspected for certain identification numbers that are shown in the link above. If the part had the numbers, it was replaced. My particular car did not have the defective part, so it was not replaced. The information that your dealer is providing may be accurate; the actions taken by Mercedes (regardless of country) may not have applied to your vehicle.
I would not hesitate to have a tech look at your harmonic balancer to see if it shows any signs of separation, or other damage for which it should be replaced. (For other readers, if it looks OK, and if you are not experiencing vibration, it is likely OK - especially this long after manufacture). Because yours wobbles, I would replace it (though the wobble may not be caused by the separation problem that resulted in the U.S. campaign). Replacement of the bolt was not part of the recall notice I received, but your problem may be from wear of either the balancer's bearings or the bolt itself.
A search of the forum (and also MBWorld) will also reveal some DIY information on replacing the balancer with 3rd party "performance" versions. Those posts may save you some money (even if you used a stock balancer) if you wished to replace what you have for peace of mind.
I searched the U.S. NHTSA site for recalls and for technical service bulletins; that particular campaign was not listed. Office of Defects Investigation (ODI)
This response differs from my email response to you; I came across your post, which had more information than your email to me, after responding to your email.