Need your help guys.

Yesterday, I turned the key to turn the car off. The battery light stayed on. Strange. Even with the key totally off, the battery light stays on.

I try to start the car, the glow plug light did not come on but it started fine. This was probably due to the engine still being hot.

I was able to drive the car home without incident but the light again stayed on even after the key was out. I had to disconnect the battery to turn the battery off.

Observations-
The battery light is on and the fuel guage is also working with the key off.
With the key in the 'on' position, the glow plug light is not on.

Last observation, when this happened, I smelled something burning under the hood. Although I did not see smoke, I smelled maybe burning wires?

All the fluids looked fine and there was no obvious burnt wires.

Any ideas?

__________________
Ben
1987 190d 2.5Turbo