 Had a turbo replacement for the 05 CDI  with no engine damage at 149,000 miles - no problem.   Just was informed by the Greenwich Penske/MB dealer that the 2007 Bluetec had a blown  turbo which destroyed  the engine. Cost to repair $13,000.00 - market value around $8,000.00.  The turbo parts enter the engine itself and destroy it. A  known design problem which has happened to thousands of Bluetec's.  MB Corporate says:  "Tough, car is out of warranty - we decline any responsibility. We can refer you to a good junk dealer.Update: 6/30/2018Had to junk the 2007 Bluetec.  I am left with a 2008 Bluetec and the above mentioned 2005 CDI.  I am now changing oil every 5,000 miles.  When parking either car I let the engine idle for some time to cool the oil in the turbo before removing the key.  I originally bought the three Diesels on the recommendation ofConsumer Reports in 2007.  During the last five to eight years CR does not even mention that there are MB  Diesels.All in all a most unsatisfying experience at the Greenwich, Ct Penske  dealership and MB Corporate.  Never again an MB.