Dennis, I also have a 2006 E320 CDI-- I have 80K and all I can say is WONDERFUL.

I have maintained it exactly as the book says and haven't had anything of substance really happen.

Be careful of the acceleration -- you can easily contribute to the state police fund if you don't watch it -- 100 mph is nothing and is very easy to get to!-- blink of an eye.

I've used Mobil 1 0-40W and change it every 13K. I had an oil analysis done and except for the color the oil was within the "new" tollerance range.

all the best

3pointstar

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