I just bought a '99 GLS and quickly began having issues. Driving home from the dealer, ALL of the dash lights came on. The dealer had the sepentine belt and battery replaced. Seemed to work but last week my wife noticed the gas mileage diminish significantly. Around the same time the check engine light, battery light, and brake light came on. I took it to a VW dealership and they said the throttle body needed to be replaced. They tore it down and cleaned it first. Due to the cost, I haven't replaced it yet. Then this morning I started it up to warm it up, and after about 15 min. it sputtered and stalled. Now when I try to start it all I get is the starter solenoid clicking. As a side note, sometimes when I start the car the starter makes a whirring noise. Am I looking at a starter issue or an alternator issue causing the no crank issue?