Jacques,

I think Prevost is right on. Most owners do more harm than good when they try to exercise their buses while stored in a facility. The only way to truly exercise the bus it to get in it and drive it for 50 miles (80 Km). If you can't do that, you probably are better off doing nothing. Periodically starting the engine with little more than and idle will lead to all the problems I described earlier. Trying to exercise the suspension with anything other than dry air is going to cause problems. Running an on board 120V air compressor will inject moisture into your air system. Probably the best you can do is dump the oil before storage and fill with fresh. Run the engine as described in the DD S60 manual for 30 day storage. Then leave it alone. The same with the generator. Keep it plugged in and keep your chargers on. I make this part of my annual service. Prior to parking for the winter I do my annual fluid/filters/chassis lube. Makes it easy remembering what I did and when. In Spring time I'm ready to hit the road.