Not a good outcome, either for you or Audi it seems
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Surely a key element of brand value is in ensuring that standards (whether it be manufacturing, service, or customer management) are met, and reflect the values that the brand aims to promote? Which is this case doesn't seem to have happened, which is a real pity when you consider the loyalty (and advocacy…) that you've provided to Audi in the past over a number of years.