Ok regarding my e39 everything pretty much is up to date and fresh but on my cars i like to refresh the diff oil and autobox oil, i know there is many debates regrding the gear oil and its lifetime etc, My indy who is BMW specialist recommends doing them now firstly where and which is the correct oils for the diff and autobox?
i was considering getting a auto box specialst do to the oil so its properly drained out and flushed and a new filter fitted and correct oil, also would you recommend me doing the power steering fluid also ? thanks any advice appreciated