Hello there,

Today I found the battery of my '96 E34 completely dead (I suspect I'd forgotten the CD player on). Assuming the battery is just drained and still usable, I connected to the battery of a friend's car with the intention of starting and eventually charging my own battery. The engine was starting and then producing horrific (metal-to-metal) sounds and also vibrations, and then in 10 seconds it was going off (RPM were abruptly going from 1100 to zero). Then after the engine was off, a 5-second "rubber-against-glass" sound was appearing from under the hood.

Could the dead battery cause these problems (I suppose problems in the synchronization of the engine)? Has anyone experienced something similar or have a suggestion what I can try next before I take it to the service point?

Any help is greatly appreciated!