I use two 32oz bottles. One is usually enough for a annual flush but I have another on hand just in case. Only use new brake fluid from a sealed bottle, don't save the old stuff.
I second this recommendation. If you rear end a brand new $100k Mercedes can you pay the $50k difference for a new one out of pocket, or will you have to sell your house? At one point I thought about how expensive new cars are these days and bumped up my liability coverage for that reason.
Climbing just depends, usually D is fine but if you find the transmission constantly hunting for the right gear its easier just to put it in a lower gear and leave it there. The ECU(s) are constantly taking into account the load on the engine, accelerator position, speed, air density, etc... and...
As others have said, use low gear and go slow. Engine braking is your friend and won't hurt it or the transmission. Keep a close eye on the gauges and fluid levels, if you have a leak or issue get it sorted out before "pushing onward".
I'd recommend a brake fluid flush every two years at a minimum. If you do your own work its only around $25, including the brake fluid and one man bleeder. I replace the fluid in my FZJ80 and both BMW's once a year.
BFG KO2's all the way. Went on a 30 mile drive yesterday on forest service roads in 8" of fresh snow without any issues (no lockers, no CDL engaged). They also work really well on snow packed roads, you really have to try to make it slip.
In addition they have the snowflake symbol and count as...