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Odd engine noise and ... smoke?

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Old Feb 1, 2020 | 05:15 PM
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W221 2010 S550
Odd engine noise and ... smoke?
Hi all,

wondering if anyone can help me out and identify whether this engine noise is normal and if not what might be the issue. I also thought I was seeing smoke rising from the top right side of the hood from drivers position but couldn’t reproduce with the car just parked and engine on. I’ve attached a video, appreciate the help!
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Old Feb 3, 2020 | 02:39 AM
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W221 S600, W220 S55 AMG Kompressor, W124 300E, W140 S320, W210 E3204M W164 ML320 Bluetec
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