Keeping this in consideration, do all Mercedes take diesel?
Depending on the model year of the vehicle, Mercedes-Benz diesel engines require the use of either diesel grades 1–D and 2-D or ultra-low sulfur diesel fuel (15 ppm sulfur maximum). Also - currently there are no fuel additives approved by our factory or MBUSA for diesel fuel vehicles.
Also, why did Mercedes stop making diesel? The current submission to NHTSA from Mercedes-Benz is devoid of any of their diesel models, which signals they won't be selling those editions of their vehicles in that country. But the answer might be more basic than that: American buyers simply can't get the proper fuel to use in their BlueTec vehicles.
Thereof, are Mercedes diesel engines reliable?
The newer diesels are fairly reliable as compared to their gas engines- but the rest of the car built around them are just not that great. Electrical issues, drive-train issues.. Yup, the block and pistons will survive the apocalypse, everything around them will require a tons of cash, and oh boy, do the break.
Which is the best Mercedes diesel engine?
the OM611, 612 and 613 are the best, even now, since they aren't burdened with too much unreliable emissions gear like the newer models. They are basically all the same engine just with one or two cylinders sawn off.