Hi,
One year ago the MB dealer changed the oil cooler seals to the new purple viton seals, replacing the old orange ones on my R320 cdi.

Unfortunately oil has started leaking again through the lower left engine seep hole.
There is no oil dripping from the turbo inlet so I am inclined to think the problem is again with the oil cooler seals.

Is this a never ending problem?

Any ideas on what to do? Sell the bl.... thing?.