For your FSS car, MB issued a new approved oil list AFTER the list Gilly mentioned. The new list is to be followed on all FSS cars and recommended on all other MB cars.
MB had problems with the FSS long drain intervals using the oils from the old list so they ask dealers and customers to follow the new list.
MB uses Mobil 1 "0W-40 Turbo Diesel" in their diesel engines. This oil did not come to the US as very few 98 and 99 E300Ds were sold here. So back to your original question and my original answer a few posts ago, "Mobil 1 0W-40 Turbo Diesel" is the OFFICIAL oil for MB diesels (that is what they use in the factory to fill new diesel engines).