I do not know whether I can comment on this without offending the site rules, but here goes, If anyone is having trouble with their A/C + heater on the E36 328 etc, the unit is very easily taken out (2 Mins) no big problem to replace, there is a site on EBay that will replace & exchange for �35 and guaranteed, I hope this advise is not going against AB rules. but we will soon find out.