If you are storing the coach for a long period do not go out every few weeks and start the engine. It takes a long time to warm up the mass of the engine, and unless it is completely warmed up to normal temperatures you run the risk of condensation. Also, every engine start creates excessive wear so the fewer the better.

If you insist on running it periodically, at least take it for a drive. Get it completely warm, and best of all your hub seals will love you for driving it. They do not do well on a coach that sits. Either do the valves in the leveling system. They tend to get cranky if they are not also regularly exercised, but you do not need to drive the coach to work the valves.

Don't forget to fire up the Webasto monthly.