We used to offer a manual air dump. People would dump and then drive away and forget to re-inflate. They would damage the air bags and then claim them under warranty. When we would explain what they did, they did not care. They did nothing wrong and if we did not cover the air bags they would sue us.
It was a catch 22. Reduce flexibility for a very small percentage of owners or make it dummy proof for the bulk of owners. Now, its hot to the key. I think you could still add a manual switch. I can look into what we used to do.
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