Thanks Garak. This is going to be a very useful tool. I am going to assume that the people who said they got these off the wall bulletins were misunderstanding for some reason what they were reading. Thanks again for this link.
No problem. Never trust the dealer, at least until you can confirm their nonsense in writing from somewhere else.
I remember the chaos that ensued from VW/Audi dealers using GTX 5w-30 for long OCIs in TDIs and gassers where GC was the approved lube, and some of the Mercedes people up here at the time were no brighter.