I'm looking to buy a 144 Sprinter and plan to tow a 19-foot bay boat from time to time. Does anyone have much experience on how the 4 cyl twin turbo performs? I test drove one yesterday and it seemed to have plenty of pep, but I wasn't towing anything. The dealer didn't have a 6 cyl diesel to test drive. The dealer said that the two engines got similar fuel economy numbers, but I expect the smaller gas engine would come way down in fuel economy when pulling a boat. Anyone towing a boat with a 4 cyl gas Sprinter, if so, are you happy with the performance?