Just bought a 2012 ML350 BlueTec!
Since you work on your cars, I don't need to tell you that paying attention to and identifying problems early is the key.
I like the engine bay of my ML350. There is plenty of room to work with.
Most bluetec engine problems are related to oil.
Emission system wise Cold temperature stop/go is the worst!
Even MB shops have no idea about the oil they use, and how crappy it is for the bluetec. add the extended drain interval and Arizona weather and you have a perfect repair $$$ timebomb under your MB hood.
If you're planning on keeping it forever drain the oil every 5000 miles max! and remove the heatshield under the motor.(dust pan)
Don't want to turn this into an oil thread but if you ask any tech with Bluetec experience they'll tell you to drop the oil even sooner. heck some even recommend CK4 or 10w60 type oils just to deal with the dillution issue on Bluetec.
Bluetec will have no problem making it through the warranty generally, just don't expect 300SD longevity without some shorter oil change intervals.
Extended warranty is your friend.
Last edited by nookie; Mar 28, 2017 at 05:42 PM.
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Something like the oil cooler - don't think I've got time any more to do this kind of lengthy job since I'm in residency. Hard to confirm the prevalence of that kind of failure some seem like they were misdiagnosed turbo seals.
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