OK, I've determined a few things. I am not losing coolant and the smoke that I have on start-up is definitely OIL. As posted earlier, I have checked and re-checked the valve stem seals and the guides - no problems there.

What else could it be and how can I check for sure?

Thanks.

Ryan

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RG Newell

1984 300D
1972 250
1986 560SL
1991 300CE