You're right. I will order several bottles of 901 477 50 99 Diesel Additive. However, I pick up a bottle of diesel additive from a regular auto part and now the smoke is not as black and thick as before.
I purchased this car with the intention of giving it a proffesional paint job. I want to make sure that the car is worth the additional investment. Therefore, I'm observing it very, very carefully. Yesterday, for instance, I notice motor oil inside the canister that houses the air filter. There is a tube that goes from the top of the engine to the air filter/turbo area. For some reason, a small amount of oil is pushed out of the engine to the air filter compartment. Is this an indication of serious engine problem?