I have the 1992 300se 3.2 V6. The heat works great in the front but not under the rear seats and the rear passagner vents blow cold air out at all times. Also when you are at an idle the air gets cool. I also am having trouble with the dash cluster lights flickering when i use my turn signels and wipers? My car has 180,000 miles on it does the timming chain need to be replaced?? Thanks God Bless :-)