with my 545i nudging its way towards 160k kms, I'm going to have the trans serviced, or at least, the filter and pan, mechatronics sleeve, and fluid replaced.  I have the pan and bolts and sleeve, and new fill plug ready to go. I've been looking into fluids.  Seems the ZF 6 Speed is sensitive to fluid... The Spec for 6HP26 is: ZF Spec TE-ML 11B Shell M-1375.4 Armed with this knowledge, and wanting to avoid "DexIII" assumption, I've looked at lots of info, written off