The "flushes" generally do more harm than good...

ATF is very easy to do. The hardest part of the process is finding the Torque Converter drain plug. Easiest way is to "carefully" turn the TC with a large screwdriver otherwise you'll need to turn the crank and have someone under the car watching until it is visible.

There was a great tip in my "E-Class Bible" that says after draining the pan, only unbolt the frontmost 2 bolts, then SLIGHTLY loosen the two rear and let the pan tip forward naturally as this will save a boatload of remaining fluid from spilling all over your floor.

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2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k