The other day I noticed a vast decrease in acceleration in my C280 when the A/C was on and it was a hot day. I think it makes the engine run hotter and sucks power, both contributing factors in a loss of power. So whenever someone wants to play from a stoplight, I switch the A/C off.

420 SEL: I still don't get how a driver can affect the 0-60 times on an automatic between another? Is it a technique with braking while pushing the gas??
That is another way I recently noticed to get a REALLY good take-off. Hold the brake and let the engine rev to 2500 RPM, then take your foot off the brake and FLOOR IT! I even beat my friend in his E430 up to about 40 mph when I did that, of course, he took off from there. I don't like doing that much though, can't be good on my poor engine and drive-train!!

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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!)