Is it just me noticing - most bearing failures occur in lower temperature. Worn out grease perhaps? or wrong grease -

I have removed MB green grease from my W124 that looked shiny but was stiff like candle wax and the bearing rollers had a black gooey oil only (didnt resemble any grease I know of).

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)