Ali,
I see what you are saying, I will check the trans fluid.

JHcuyhn,
Do you mean that when I floor it under normal conditions that the trans should shift that roughly? If it is, then it doesn't. What I mean is that at regular altitude, I always have smooth, precise shifts, unless the engine is cold of course.
I have never experienced this kind of shift unless the engine has been cold, in which I don't drive the engine hard.
Thanks guys, anything else?

__________________
2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)