Excellent job.

There’s no sense in anyone being intimidated by maintaining the transmission himself. As long as the correct fluid is used along with the requisite specialty tools and the utmost cleanliness is observed during the procedure, you’ll be rewarded with increased service life and far better shift performance.

MB originally insisted that our 722.6xx transmission had a “lifetime” fill. That was only the case when scheduled maintenance was included in the purchase price. Now that those marketing wizards have been given the boot and sound engineering has once again prevailed, 39k mile/three year ATF fluid and filter replacements are once again specified in their service regimen. If you’re trading up before its warranty expires and your conscience allows it, they’ll easily go 50,000 miles with no attention, save for the TCU connector’s O-ring.

Although we have no torque converter drain plug as shown - some worthwhile pictures here:
http://www.mercedesshop.com/Wikka/Trans7226Fluid

I’ve twice flushed my ATF in its entirety; it’s not difficult for any reasonably competent DIY’er.
A bro's well documented procedure – if you’re so inclined:
http://forums.mbworld.org/forums/sho....php?p=2739493

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