Thanks for the replies. I am going to try and check it again tomorrow - with the car warm (which is what the manual says). And I will add some oil and see what happens... If that changes the compression reading, what then?

Smoke goes away very quickly, easily within 10 seconds. I don't notice it at all while I'm driving the car.

Ryan

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RG Newell

1984 300D
1972 250
1986 560SL
1991 300CE