You should do a search for HARD DRIVING, that should answer your questions to flooring it and how it affects your car. My transmission on my C280 does the same, but only when it's cold, also, maybe it's just a characteristic.
Actually John (JCE) suggest that maybe the transmissions are interchangeable.
MBDoc, can you give specifics as to why it's not? Seems like they could be?
2006 E350 w/ 155k miles (Daily Driver)
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!)