If your alternator stuck, your belt will burn up and finally break.

From your first story, it sounds like the alternator is not charging the battery.

Make sure your battery is charged and then try this with a voltmeter:

Start car and let it idle for a few minutes

Turn on the headlights and read the battery voltage, it should be above 13.2 volts. If you bring the idle speed up, the voltage should increase to 13.8 - 14.0 volts. If not, then the alternator is not charging the battery.

__________________
Michael LaFleur

'05 E320 CDI - 86,000 miles
'86 300SDL - 360,000 miles
'85 300SD - 150,000 miles (sold)
'89 190D - 120,000 miles (sold)
'85 300SD - 317,000 miles (sold)
'98 ML320 - 270,000 miles (sold)
'75 300D - 170,000 miles (sold)
'83 Harley Davidson FLTC (Broken again) :-(
'61 Plymouth Valiant - 60k mikes
2004 Papillon (Oliver)
2005 Tzitzu (Griffon)
2009 Welsh Corgi (Buba)