I have done it both ways...but stopped the flushing after it caused a problem in a Q45 some years ago.

I just drain, change filter and replace now. Make sure you do the torque converter if you have a drain bolt plug.

I also use synthetic Mobil 1. Don't know if it's any better, but since you are keeping it in for 30k miles, the cost per mile isn't too bad.

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1989 300ce 129k
( facelifted front,updated tail lights, lowered suspension,bilstein sports, lorinser front spoiler, MOMO steering wheel, remus exhaust,stainless steel brake lines). (Gone)

1997 s320 154k (what a ride). Sold with 179k miles. Replaced with Hyundai Equus

1994 e320 Cabriolet 108k



1972 280se 4.5 153k Owned for 12 yrs, sorry I sold it


[/SIGPIC]