The new sprinter with the v-6 Diesel, has the possibility to be a huge pain in the ass... It's got guts. But From what they taught us, If there is any sort of internal issue. The engine needs to be swapped, because they say its all balanced internally, if a connecting rod needs replacement, all the rods and crank have to be done with it. We don't see enough Vipers for me to be certified with them. I'm working on all the Cummins Certs now, I've got those trucks coming through the woodwork.