You do not say what you are accustumed to driving or if this is the first tme you have driven a diesel motor home. The transmission not shifting down when you put the pedal to the metal as expected is not unusual to someone not familiar with how the diesel works, and sounds like my reaction the first time I drove a diesel. The warning lights, the surging and the missing are not normal so there is at least some problem with it. I suggest if you have not driven a diesel before you drive another ( or a couple ) so you have a reference to compare to.
