If you are not into (the cost of) Genuine MB ATF and not so sure about Mobil1 Synthetic ATF - since they stopped providing the specs on the label...I recently purchased AMSoil Synthetic ATF (10qts came to $108 w/tax avail at NAPA) and it lists meeting all the MB specs (that Mobil1 used to) applicable to the 560 transmission.
By the way, the transmission shifts great!
By the way, the transmission shifts great!