my car seems to excelarate a litte on 2005 Mercedes-Benz C240 4MATIC

i notice that when a drive and when i park my car feels like if its excelarating, i just changed the fuel filter and same thing it just started happening about 1 week ago,somebody please help

by in Brooklyn, NY on November 28, 2012
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1 answer 1 comment
ANSWER by , November 29, 2012
have it scan tested for codes and go from there
COMMENT by , November 29, 2012
i just made an appointment at mercedes dealer for monday they are going to do a dianostic check