E9X M3 require a running in service?

[dergside]

AFAIK, yes. 1200 miles like other M's. Anecdotal evidence suggests that missing it could bite on the ass in the event of looking for BMW goodwill, etc. From what I understand they use a different level of fluid for diff and engine out of the factory - lower grade - to wash out the contaminants and general crud from the engine bedding in and a flush and proper grade fluid is essential. I'd imagine that there might be some case for overlooking the RI service being a little bit late, but if it was skipped altogether I'd probably be looking elsewhere. It might be that you'd describe it as running on dirty washing up water until the proper stuff goes in at the RI service!