I think mine said "senior member" at around 100 posts or so.
It's all by the number of posts, there are no benefits to becoming senior or anything-no "AARP" for MercedesShop members, or "Senior Discounts" at McDonalds. If you want the definitive answer. EMail the webmaster (Bill Wood), there is an area if you scroll down to the bottom of the page for "contact webmaster". Post the answer you get on this thread please!

Gilly