Yes, you need to use Ultra Low Sulphur Diesel, ULSD. But lucky for you, it is the only type of diesel sold in the US and Canada. What you need to watch out for is biodiesel. Most diesel sold is ULSD, 5% biodiesel. It does not need to be labeled as biodiesel if it is 5% or less, however.
Mercedes suggests you stay at a max of 5% biodiesel but you can burn diesel with higher (up to 20%) if you need to. Just switch back to the regular stuff as soon as you can.
The better Mercedes Diesels are the second generation V6 engines which were introduced in 2012? That generation of engine is still used.
DEF is no big deal but it does keep the air cleaner for our babies and grandbabies. DEF engines run cleaner and produce more power than their predecessors. All you need to do is fill the DEF tank every 4-5000 miles.
Roger & Mary
2017 Winnebago Navion 24V
2014 Tiffin Phaeton 36GH (Sold)