Just sold my 5.9 Mega Cab and bought this 2015 Laramie Limited EcoDiesel. I noticed a nasty smell when it was running in the garage and i turned it off. and it was not Diesel exhaust. I looked under the truck and and there was a clearish looking liquid dripping off the muffler. Do you think this was the def system activating and running out instead of burning because i shut it off ??, i didn't see the funny swoosh symbol on the dash ??