Recordings of both buses by Zeiss HeinrichG https://github.com/HeinrichG-V12/E65_ReverseEngineering - see https://github.com/rusefi/rusefi/wiki/e65-can for description
Need to decode message format: Huge list in German https://www.bimmerforums.com/forum/showthread.php?2298830-E90-Can-bus-project-%28E60-E65-E87-%29&p=29628499#post29628499