Perhaps it is the IP causing this, it doesn't have enough oil before but afterwards it clatters away? Seems like I heard it is the cause of most motor noise before, quite something....

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Jeff M.
Mercedes W123 DIY pages are now located here.
1983 / 1984 300D Sold
2000 CLK430 Cabriolet ~58k Sold
2005 Avalanche 4x4 ~66k