MY 190E SHIFTS (AUTOMATIC TRANS) VERY HARD WHEN GOING FROM 1ST TO 2ND GEAR WHEN IT IS COLD OUTSIDE.I DO WARM MY CAR UP A LEAST 5-10 MINUTES EVERY MORNING. THIS IS NOT NORMAL.IT DID NOT DO THIS 2 M0NTHS AGO.COULD THIS MEAN LOW TRANNY FLUID? OR IS THERE SOMETHING ELSE WRONG.