First time owner of a TDI (2001 NB, 5-speed manual). Very impressed with mileage (~47.5), and suprised by the power. Also own a Dodge Cummins 6.7 litre, 6-speed manual (~15.3 mpg). Guess what I'm driving to work. Today I received an "MIL", right after starting up. Stopped on the way home, did...