Welcome to the world of diesel pushers.
Advice ; Don't put gasoline in the fuel tank .
As with any RV , check to see that you have ALL the owners manuals , appliances , chassis, engine and coach.
Go through every compartment , and find every fuse , relay and flasher .
You'd be shocked by the number of posts about people who can't find flashers , ( signal and emergency ) when they've quit working, much easier to locate when they still make noise.
When you do find , fuses etc. MAKE NOTES, do not trust important ; need to know info to memory.