We only have one 2007 and it isn't in operation yet, due to waiting on 3rd party window suppliers and rear AC manufacturers to get their act together (don't get me started, it's a nightmare).
When we talk about the 2007 sprinters on our website, we are actually referring to the new style of conversion we are doing which is an upgrade over what we have done in previous years.
I'm not actually out there driving the vans so I miss out on some of the finer details that are non-essential to getting to the next show. I haven't heard any reports of rumble issues, but given the vehicle continues to operate fine regardless, it could just be that our clients are not annoyed enough to report it to us.