thanks again q7silver, appreciate all ur input on battery query i had too....as for my minisclue leak will either buy a whole new filter so i can get the o-ring or see if BMW out here does sell the o-ring sepately, looking at oem again dont think it comes separate

another good link on the tightness of cap

DIY: E39 Changing engine oil made simple (how to do it in 30 minutes and not crying!) - Bimmerfest - BMW Forums

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E53 X5 3.0d SUV prod.date 11/2004 eng.variant M57N Europe Right hand drive N