If I recall correctly, you have struggled with this problem for a long time.

I also read the same problem you post in other forum.

I have the same car, same year, same problem, until last time I replace the spark plugs. Now, I know you replaced them already. Here is the million dollar answer to our hesitation agony-- make sure you torque them to 20 ft-lb! That is the torque specs from owner's manual.

Try it, my problem on hesitation is forever solved.

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11 S550
09 C300
91 560SEL
90 300CE
84 380SE
83 240D