I have been reading this wonderful forum. I have to tell you that I have nothing to contribute in terms of BMW knowledge. I am a pretty good driver but I marvel at the depth of your car knowledge.
I am considering purchasing a used BMW. I have narrowed the field to either a E38 or E39 (Right now I am looking at 2002 540i, a 1997 540i or a 2001 740il.) After going through all the parameters that I have set out there is only one that is really bothering me. The vehicle would primarily be used for long distance driving. But, not just long distance driving as in driving for 4 or 5 hours but driving for 16 hours or more at a time. The only break would be to switch drivers, bathroom and meal breaks. I have been told by a non-owner that I should not be getting a BMW just for that very reason because those vehicles cannot stand that type of heat. I would like to know from BMW owners if I will have problems with overheating under those conditions.