Hey guys, I've got my 140K mi. 91 W-250 that I'm prepping for paint. I suspect I may have the dreaded cowl cracks, but I'm not sure. I can't see any cracks through the door jamb with the door open, but I sometimes get a metal on metal creaking sound from the left side under dash area, usually more pronounced when I run cold air through the hvac system, be it A/C or cold outside air. I'm speculating the cold air causes contraction of the loose metal, and it squeaks. Hate to pull the fenders needlessly, but now would be the time if I do. Any thoughts???????? TIA and happy new year to all! ----Kenny