ive got an 87 300d and the back seat pump is giving me grief i had to replace it and the lines didnt add up .so know i have a disaster on my hands . i have no idea if i have ortho seats (i can look if you tell me what to look for). the original set up had 2 yellows in a tee and 2 greens in a y nipple going into the bottom of the pump. the doors dont lock automaticly and neither does the trunk . what is the proper setting ? the unit on top im not sure if it goes there .the gent i bought the pump from included it for me in case i needed it .