i have a 75 450 sl , the blower stopped working, saw many things posted on vacuum repair, does anyone have a simple way for a modest mechanic, to check vacuum sources, ie where to start, get the parts etc. for ac and door locks. i have a mighty vac tester
also blower quit working, i am trying to rebuild. does anyone have brush source, rebuild source and or parts source. also need to know how to take out drivers window switch. thanks much willson