My C4 V6 2.8 automatic still doesn’t start! I have no idea what it might be. Again in short form, what was done: engine went off at the red traffic light and didn’t jump any more! At home it was changed: fuel filter, candles, various hoses, reverberator, fuses and pump relays. Problem now: no ignition spark. Fuel pump starts up, ignition control normal, starter spins powerful and soft / round. But, it starts the 4th week! I have isolated cables and installed new plugs, thought of a cable break, the error program has been read out, no interference except on the air conditioners. Switch motor changed, computer says: everything OK! So, now the question to all experts: what can it still be. I am now grey around the mouth like a dachshund. I am grateful for every tip. Here again the vehicle data:AUDI 100 2.8 V6, AAH, automatic, EZ: 03.1992, 195,000km Thanks to all of you! doc-Chris