In these super HOT days, given a choice to drive an E34 or Wira 1.5 , I have no doubts driving my wife's Wira 1.5 because the air-cond is just damn cold.Even under the hot-sun, wind-down both the windows to release the hot air and blast the air cond to full, in a moment, I would feel like I am in Genting.I always wondering if I could replace the e34 air-cond system to using DENSO system or Wira /Perdana air-cond ? What is the impact or disadvantages ?Or could some of my car factors affecting it ....1) Dark blue2) tinted windows ages ago3) ever since i put in an OBD, the temperature always show -37'c4) when traveling on highway, after a long time like 3-4 hours, my air-cond will blow out white smoke then the air cond will become not cold , take some time again to cold again5) when park my car indoor , after few hours shopping, when open car door , can feel hot stuffy air inside car cabin, I suspect heat from engine ? Any remedy ?I know best answer to all my problems is to get my affordable dream car e60 or e39 but pocket is ada "lubang" ....All sifus , please help ......Thanks in advance.