jakegw2 wrote:

I am a bit surprised that you are so firm on the MB platform. As near as I can tell the biggest benefit it offers is a higher tow rating (well, a 4WD option too). From anecdotal reports the ride is rough without an aftermarket suspension system. It uses diesel fuel which will likely start to disappear from many service stations in the next few years now that the VW scandal has removed so many diesel engines from service and all but killed the market for new consumer ones. Despite the nametag the Sprinter is not particularly 'Mercedees-like' - very few of the advanced MB luxury features are available on the platform. Not all that many MB service centers will perform repair work on the Sprinter making it a chore to get repaired if there is not a good one close by.

Certainly it has the MB symbol on the front and I know this makes a difference to some people. The PM chassis on the other hand has more of the traditional car features, including the side curtain airbags. All Dodge dealers work on the platform, making it easier to service. Any cost comparison between gas and diesel fuel economy that takes into account the cost premium for the diesel engine will show a significant advantage for gas in terms of total cost of ownership. In my opinion the vertical side walls make a huge difference in the feel of the interior space, while still having a better turn radius then the Sprinter (more maneuverable).

Not that I am trying to talk you out of buying a Sprinter chassis. The MB platform is fine and perfectly serviceable for a class B, but selecting a model with a preference for it outside of the tow rating and 4WD capability seems like it would miss the bigger picture. I would recommend choosing based on layout and build quality of the conversion regardless of which platform it is built on.

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I will second your opinion of the Zion SRT. It was very impressive to me and offered such a spacious interior with lots of flexibility.

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You also mentioned wanting to get the Voltstart system. I must say that offering this as a factory option with the LiPo batteries is by far the most functional factory power system offering on the market. I do have some concern over the quality and long-term reliability of the system however. If you have not seen it before please spend some time checking out the www.thefitrv.com. The blogger is an extensive DIY person who builds his own LiPo system with secondary alternator. The market is pretty immature right now. There are very few components that are specifically built for LiPo and that will not damage them in the longer term. As far as I can tell RT does not share the component info, but they do not appear to be using components from the few manufacturers who have completely rebuilt their components for LiPo-optimized functionality.

But by all means take this with a grain of salt and do your own research. Even without the optimized components the Voltstart is far more functional then a traditional generator & AGM battery setup and will probably last as long as you own your RV if you are using it only sporadically.