"When I turn on the key, the wire looms that connect the glow plugs get red hot,"
Something doesn't sound right. The wires shouldn't be getting red hot, or at least I don't think they should. Are you sure they are all wired in correctly?
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72
'02 CLK320 Cabriolet - wifey's mid-life crisis
2012 VW Jetta Sportwagon TDI...at least its a diesel
Non illegitemae carborundum.