Corby:

Sounds like you got an old set, or someone has dug around to get the two different types. The smaller ones go on the intakes, the larger ones on the exhaust. MB supposedly standardized on one size a while back as it doesn't seem to make much difference if they are all the same size -- mine were (OEM MB parts). Use the little plastic covers when you slide the new seals on, or the threads on the valve stem will eat them and they will be as bad as the ones you took off!

Will solve some of your oil consumption problem, at least the blue smoke on startup!

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!