My CLK350 Mercedes is stuttering under light acceleration. Any ideas??

What is your question?

When going above 2k rpm's, the car stutters at random times. I know that cylinder 6 is misfiring, but its been doing that for months and hasnt stuttered until yesterday. The car has 168k miles and is a 2007 cabriolet

What makes this problem better or worse?

It seems like it happens warm and cold

How long has your 2007 Mercedes-Benz CLK350 had this problem?

A day or two