[woodpoleman]

No not yet fixed.

Car gave up the ghost completely and was transported to local Audi. Didn't show anything on diagnostics, which was sent to Germany but still no joy. For no apparent reason car then started after a couple of weeks. Audi then cleaned earthing points and checked all fuses, relays and the starter motor.

Had the car back a couple of days when the fault reoccurred. It happened again last Friday. On both occasions it wouldn't start from a jump off a standing battery but started easily from a jump with the other vehicle engine running. Again on every occasion could hear the starter solenoid clicking but would only crank when the other vehicle engine was running. Don't know if this suggests the starter is breaking down and needs some extra oomph. Interestingly always starts from cold even this weather and starts from hot i.e. after a run stop and start again immediately but not when warm or the weather is hot.

Audi uninterested to offer any solution. Car is now with my other garage and told them if need be replace the starter motor.

Any thoughts out there will be most welcome. Can't believe this is the only A8 ever to do this!