I wouldn't pay that. I would delete it. If you live in a area that isn't really big into emissions testing (like California) then buy delete tuning from PPEI or GDE and get an exhaust. That should take care of your issues!
What is your winter procedure for your ecodiesel?
Normally I try to keep a good check on tire pressures, fluids, etc.
Anything else someone does or has a good checklist to go by? What about fuel additives?