that yellowed fluid was originally red tinted when new, its the fabled MB 236.10 ATF aka shell 3403M115 ATF.

its normal for it to discolor after use.

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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)