Tony,
Looking at your Picasa Album photos, it appears like you have spent a lot of time in standard non-expedition Class A and Class C motorhomes in conditions and campsites very similar to some we have been in with our Class C here in the West.
Reading about the Mercedes Benz experience, it seems like shock absorbers was one of their weak points. It's easy to beat shocks to death on rough roads when vehicle speeds are a bit high for conditions, which probably was the case with the MB team .... as they had a time schedule to meet for the entire trek. I suspect that with respect to shock wear, it's probably the speed of long-throw actuations that is more brutal on them than the number of long-throw actuations.
Great Album, by the way!