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https://www.pistonheads.com/gassing/topic.asp?t=1076816 Seems pretty comprehensive. I’m not sure if the M5 has air springs at the back (like non-M) but if it does, test the car with someone or something in the back. A noisey compressor from the rear DS (or on-screen error) means it or the bags or both are on the way out. None of the niggly electrical things listed affected mine but brake wobble (dodgy discs) manifested after a long motorway run. If it has adaptive/Xeon headlights check they work properly (little dance when you turn them on and look round corners as you steer - really obvious at parking speeds) as appaz they’re a bag of sand each to replace.
Dramatic_Hammer
Anyway- E61's, what to look for, in the opinion of those who have/know them on this thread?