Jay Bob, thanks for posting your progress. I have a 2011 GL350 and a 2012 Sprinter with the OM642 and I have studied and maintained them for 5 years now. I kinda like it, it is busy under the hood for sure but I have had really good service from mine. The 2011 did need oil cooler seals and needed a timing chain at 58k miles (Tech service bulletin). I think where most folks start disliking the V6 diesel is when maintenance or something is not followed as its intended and the results are not usually good as they are not forgiving in this department. Many a Sprinter owners have goofed up a oil change or something like that and spun a main bearing only to find there is no oversize bearings, pistons etc. available.

Then there is the FedEx driver that comes to my office, he has a 2013 with the V6, with 464k miles. Hammer down miles might I add.

Use the right oil and keep those fuel filters changed.......

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1995 E300 (W124)
1999 ML430 (w163)
2011 GL350 (x164)
2016 Sprinter 144" 4X4 lowtop (906)
2004 E500 (W211) 4matic Wagon (Gold)
2004 E500 (W211) 4matic Wagon Avantgarde (silver)