I am referring to the post 85 diesels that are not the old 4 and 5 cylinders with the iron head. While they are not bad cars they do not have the reputation as having a long as average life as the 123 & 126's of 85 and before. Obviously there are exceptions. I see some late 80's and early 90's rod benders that have a lot of miles. I am not a mercedes diesel expert yet but that is what my research has shown. When the 606 came out Mercedes had a great engine again but the rest of the car was to gadgety.