reda8

I have a 2004 Audi A8L. Recently I disconnect the battery, but when the battery was reconnected it would not start, and the windows would not roll up, although the battery is fully charged. When the ignition is turned it makes absolutely no sound, although the seats and lights work. The dash doesn't light up at all. This car worked perfectly before. I am lost. If anyone has any knowledge on this particular situation please feel free to chime. I am completely baffled.

MP4.2+6.0

the kill system that activates in accidents and shuts down the motor related items. IIRC it is that plastic shrouded big black contraption with the heavy power cables bolted to it (and the small plug connected wire harness) right near the battery itself.

reda8

I've ran into such an issue before on a previous A8 project. It was the first thing I looked into. No cigar though. Many power function work on my car but its headlights, and power to the seats, but it will not turn over at all.

reda8

Also, my windows don't have power.

mishar

VCDS scan will help. Without it it is all guessing. Can be expensive.

reda8

Yes, about to make it happen shortly.

reda8

After some heavy troubleshooting, I have come to the conclusion that it is a bad ignition switch. I believe someone may have had the key in the ignidoes anyone have any experience with this issue? Does anyone have any experience with this issue?

Thanks in advance.

dvs_dave

Not much help but you have a very striking looking car! Never seen a red A8 before. I like it! Although it looks to be riding very high?

Mister Bally

No way did you disconnect the battery and the ignition switch failed. Just no way. Have car towed to dealer to troubleshoot the component protection or immobilizer circuit.

reda8

Yes, the ride height was high on that pic for some reason, not normally though.