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Q: Some rough idle in park/ start up on 2003 Mercedes-Benz S55 AMG

I have a bit of rough idle at start up. I have placed new plugs (Bosch Iridium) car runs fine once it warms up. I have put in cleaner additive, but still rough idle at start up for about 5-mins before it seems to get better. One suggestion was fuel pump sensor???? No diag codes???
Thanks for your time!
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There are some causes of rough idling. You can visit here to see the detailing instruction
http://goo.gl/vw97a
There tells car rough idle causes and how to fix it clearly. So I'm not repeat here.

Good luck and best regards.
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