I've been having some strange issues with my '00 RS. I suspect it's the alternator, but having someone confirm would be helpful. There have been two instances of electrical problems:
(2 days ago) After a recent cold snap, my car would not turn over. It would try its damndest, but just couldn't make the crank. Getting a jump started it, and didn't have any subsequent starting issues. I didn't have a voltmeter with me, but a reading today gave me 12.75V. Age of battery uncertain.
(yesterday) While driving over a bump, I lost power to my engine and power steering. Lights and radio still on. I pulled over, and the car started right back up again. I drove it home (20 mins) with no further issues.
My check engine light is on, and has been for a couple weeks. I was just waiting for the cold to stop in case it was a temperature related issue.
I've had an alternator fail on me in the past, albeit in a different car, so losing power to the engine is what made me think this could be the alternator.
Does this sound like an alternator starting to die to you?