so... the GP light is flickering/dim and bright?
any chance you had the instrument cluster out recently? I ask, because it's easy to mix the alternator light with the GP light bulb, and the flickering etc could be caused by an alternator failure. it could also explain the difficulty accelerating if the alt is partially siezed, or the bearings are grabbing.
however, the accelerating from a stop symptom sounds like the beginnings of the infamous B2 piston failure in the transmission.

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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 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!