Injection cleaner Liqui Moly test - combustion chambers check endoscope camera - Mercedes V8 engine

I am testing the injection cleaner from Liqui Moly. Examination of the combustion chambers before and after in a Mercedes V8 engine in the R107 model of the W107 model series. Optical recordings with a Vasta endoscope camera. Deposits on the spark plugs and in the cylinder liner.
Content:
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00:00 introduction
01:50 Intro
04:28 Endoscope camera