dicktahoe

After stopping the engine with the car at a stop, as soon as I release the Brake Pedal the engine quickly starts, but it doesn't seem to be engaging the Starter motor. Maybe it just injects fuel and sparks a cylinder or two that have just completed the compression stroke. Comment or Correction.
Thanks

snagitseven

Audi claims the starter is used with Stop/Start. In fact, I was told they use a beefier version that's rated at well over 50k starts.

Mike_L

Its definitely the starter. Sometimes you can hear the telltale whirring sound.

forza1976

The starter

jdong

It simply combines a fairly standard claw-pole starter motor with a AGM battery that is more resilient to deeper discharges than a standard lead-acid battery. No rocket science here.

dicktahoe

Thanks for clarifying that for me. Since the car starts so quickly, I thought maybe some special technique was being used so as not to put too much wear and tear on the battery or starter motor. It's satisfying that AGM and a Long-life starter is being used.