BMW announced that its Chief development engineer, Herr Brehn, had come up with a solution for the "irksome chore" of maintaining correct tire pressure: dashboard tire pressure control:
"Herr Brehn perfected a revolving seal, kept airtight by an ingenious contra-flow of air under very high pressure... Touch a button on the console and a digital display gives pressure... A compressor feeds air into storage units. It then travels to the wheel centre via the revolving seal and through to the tyre. Excess pressure is merely vented into the contra-flow system."
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