I had to replace the alternator in my 87 300SDL several weeks ago with a rebuilt Advance Auto unit. Everything seemed fine but I was noticing a slight glow from the battery light at night that would go out when you increased the rpms. Now on a couple of occasions in the morning the battery will be completely dead without enough power to engage the starter. Also last night my wife said that strange thing electrically were happening in the car. The radio was turning off and on and lights were flickering, etc.The battery does check out OK.

Could this be an issue with the new rebuilt alternator?
Thanks

__________________
Western NC
1987 300SDL W126 Turbo Diesel 335,000 + miles
1976 300D W115 275,000 miles+

yup...
AA alternators SUCK...
best to get a good BOSCH unit from an import auto parts source (like our wonderful site)
it's a fair bet, that the alternator is junk from china... return it. at a bare minimum, I'd go get one from a junkyard... a gasser alternator would even be an upgrade in amps. pull the alternator harness to the jumper block as well, and you've got a direct bolt on. V8 alternators have the outer flange reversed, just take out the 4 body bolts, and rotate the front plate 180 and it fits perfect.

__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!