Car came from germany so have to brush up on my german forum slang
Good suggestion though, will give it a shot, maybe call the garages that serviced it. Wasnt anything on the bills related to flashing/chipping though. Although one garage charged 400,- for diagnostics, reading out the ecu to find a worn in exhaust camshaft that was replaced. Maybe they still have somthing in their log.
Off topic; that is a pretty freaky bill by the way, replaced camshaft, lifters etc. Car only has 50k miles, maybe because of the run in service that was not ticked in the booklet and maybe never done. Cant imagine buying a new bmw and not doing that 1200 mile service though