Not to step on the OP's toes, but I thought I'd get this out to everyone and I know of no other way to get it to the MBS owners.
Good afternoon, Jimmy. Congratulations on the purchase of your new motorhome. I
own one myself.
You are correct in that states like Minnesota, Illinois and others now offer higher
blends of biodiesel during significant portions of the year. However, despite what
the sales group informed you, Mercedes does not void the warranty with the use of
biodiesel blends above B5. However, it is important to note that any issues that
arise because of the use of ANY fuel (whether or not it contains biodiesel) may not
be covered. Vehicle and engine warranties only cover the parts and workmanship of
the vehicle. That is to say that if a fuel can be proven to be the cause of any
issue, then the issue may not be covered.
Mercedes was one of several companies involved in suing the state of Minnesota in
the last couple of years over their biodiesel mandate. I'm happy to tell you that
the case was dismissed and all further actions dropped after the presiding judge
ruled that they had no standing. In fact, Mercedes, and others such as Volkswagen
(who also only approves B5), have previously sent certified letters to their
registered vehicle owners in each state stating that the use of biodiesel blends
above B5 is permissible without voiding the warranty.
I hope that you enjoy the use of your new vehicle and can rest assured that the
fuels you purchase are suitable for use with your new diesel motorhome.
National Biodiesel Board
It's still all double talk to me !!