Yesterday I went to replace the valve cover gasket on my '87 300TD. In taking the air intake crossover pipe off, I discovered that there is a serious build up of soot in the cross-over pipe and the whole intake manifold. I scraped off as much as I could, using my shop vac and a wire brush. Unfortunately I couldn't get to the inside of the intake manifold/plenum (sp). There is a serious build up in there and I imagine the engine would run even better if that were all cleaned out. Has anyone removed the manifold and cleaned it out?

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1999 MB SL500 (110,000 mi)
2004 Volvo V70 2.5T (220,000 mi)
2014 Tesla Model S 85 (136,000 mi)
MBCA member