Re upgraded components:
All components associated with S/S have been updated. The battery is EFB/AGM, physically the size of the starter motor is increased (twice as large) compared to the 8P, and the motor mounts have been re-enforced for S/S duty.
However:
The long term effect of heat soak in all the other components (which the run-on coolant pump) doesn't cool, is unknown.
At the moment, there are suggestions on other forums that there is a casual factor in the S3 turbo failures (mainy in the USA), with start/stop.
The most likely effect of S/S is heat issues in the turbo, affecting bearings etc. but again, this is just supposition at the moment.
From:
http://www.audi-sport.net/xf/threads/s3-turbo-issues-reported.224078/
All components associated with S/S have been updated. The battery is EFB/AGM, physically the size of the starter motor is increased (twice as large) compared to the 8P, and the motor mounts have been re-enforced for S/S duty.
However:
The long term effect of heat soak in all the other components (which the run-on coolant pump) doesn't cool, is unknown.
At the moment, there are suggestions on other forums that there is a casual factor in the S3 turbo failures (mainy in the USA), with start/stop.
The most likely effect of S/S is heat issues in the turbo, affecting bearings etc. but again, this is just supposition at the moment.
From:
http://www.audi-sport.net/xf/threads/s3-turbo-issues-reported.224078/