Get the tranny fluid to normal operating temp by driving it for 15 minutes and then check it. If over filled you should remove some of the fluid. The best way toremove itis with a suction unit and a tube. Local auto store sell these. They are the designed for fluid extraction.
Check it on a flat ground. With the car in park. Do not use a rag that has any lint. Your fingers are the best way to wipe the dipstick. Clean fingers.

Dave

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1970 220D, owned 1980-1990
1980 240D, owned 1990-1992
1982 300TD, owned 1992-1993
1986 300SDL, owned 1993-2004
1999 E300, owned 1999-2003
1982 300TD, 213,880mi, owned since Nov 18, 1991- Aug 4, 2010 SOLD
1988 560SL, 100,000mi, owned since 1995
1965 Mustang Fastback Mileage Unknown(My sons)
1983 240D, 176,000mi (My daughers) owned since 2004
2007 Honda Accord EX-L I4 auto, the new daily driver
1985 300D 264,000mi Son's new daily driver.(sold)
2008 Hyundai Tiberon. Daughters new car