I recently purchased a 1985 300TD wagon. It was running great until last week. I started the car and the preglow light failed to come on. It started tis way a few times until it died on me. I took the battery down to have it tested, they charged it and said it was good. I then took the car down to have the alternator tested they said it was also good. On my way home from the shop the turn signals failed and came back from the dead, the windows were sluggish and the hazard lights failed and also came back. I got home and the car failed to start. The clock keeps perfect time! The interior light are all dim and when I use the turn signal a noise comes from under the dash. Please help so I don't get soaked at the shop.