Sprinter 216 CDI engine damage

Good evening dear people, I am more on the road in the Touran, T5 and G6 forum but hope from you professionals help and advice. We have a small company that has specialized in airport transfer, sick and dialysis drives. Have in our fleet several Tourans, T5 ́s and also a Sprinter. Up until about half a year ago a 213 CDi from 2002 which has had a relatively problemless development of its 650,000 km. In average our cars are moved 100 tkm per car. This sprinter was sent into retirement and we decided for the current Sprinter due to the good experiences made. A 216 CDI BlueEfficiency of 04/2014 was delivered. He was ordered as a taxi because we own a license. Now he ran until the end of 11/2014 until he remained at 55 ́000 km with oil loss. He was introduced and one found quite quickly that the control chain has skipped and thus an oil exit was found -> diagnosis of the factory saddle AT M to cost from MB. Now it is so that for more than 4 weeks on the part of MB nothing does. As a rental car there was a Vito with which we can’t do anything, because the Sprinter is a taxi. Last status 3 days ago was the one that the engine is no longer produced due to the frequency of problems. What now with ours nobody could tell us yet, they probably work on it. I hope now especially from the commercial vehicle technicians among you if I can find out similar in your MB workshops I’m sorry for the many texts, a good slide into 2015 and I’m sorry, but I’m sorry, but I’m sorry, I’m sorry, but I’m sorry.