Long time Bluetec owner with biodiesel concerns
My concern is that Minnesota has recently passed a B20 mandate for biodiesel which goes into effect next April. Our ML has been out of warranty for a while now, and I understand that Mercedes recommends no higher than B5 in the bluetec, but starting next year, I'm not going to have a choice. During the Spring/Summer months fuel stations will be required to sell b20 and then switch over to b5 in the colder months. My question is, will i have serious issues running b20 from April-Oct? My Mercedes tech does not have a definitive answer, but is telling me that i will have to continually check oil levels and change oil every 5k miles...and fuel filter more often. I guess if that's all I need to worry about, I'm ok with that as I change oil around 7-8k miles anyways, and changing it earlier is not a big deal. I'm mostly concerned about injectors, fuel rail, engine sludge etc.
Does anyone have experience or advice on running B20 in the Bluetec?


