i had the mercon v smell too, but realized it was from storing the containers in my trunk. Cleaned the carpet, removed the containers and rechecked fluid level and that fixed it. Remeber:
-Check fluid only when car is warm or neddle is a quarter mark (half way between COLD and operating temperature (MIDDLE).
-Fill fluid untill it TRICKLES or STREAMS vertically downwards at bottom of filler plug (that means full). Gushing out or flowing out horizontaly of filler plug at any presure means OVERFILL).
-If fluid is low, gas pedal is going to be hard to the step and downshifts will be hard to reach unless you floor the peddal. And car wont have much power at high speeds (60mph +).
-If fluid is overfilled, peddal will feel soft and act like its kinda searching for gears most of the time, and wont feel like it wants to accelerate either.