When I called the shop and described my transmission (NAG) and the associated leak... Imran quickly replied he's 95% sure it's the speed sensor adapter. A 15 min job with a $6 part. A well known TSB that MB dealerships or highly experienced transmission techs know about. Sure enough, that was the culprit and I was out in a flash.
If you want a burger go to In-n-Out, if you want tires go to a tire shop... but if you want excellent transmission service, go to Super Discount Transmission. Honest and affordable!