I have a 2016 1200GSA and I do most of the maintenance myself. Per the owner's manual and shop manual I have always put 180ml of final drive fluid in when changing. I recently took it to the dealer to fix a final drive leak which turned out to be the shaft seal. The mechanic put 200ml of fluid back in the final drive. When I questioned him about it and said the owner's manual and shop manual says 180ml he and the other mechanic insisted it is 200ml. Has there been a service bulletin issued by BMW that would have changed this or are the mechanics just wrong? I know years ago 200ml was the amount but it was my understanding that 180ml has been the volume since 2010 or so. Thanks for the input.