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True Speed
I thought it was a joke when I read that your HVAC controls could be used as a diagnostic tool, and to tell you your true speed. But, I tried it on my '98 and was truly amazed to find it was true. I checked the speed at 60, 70 and 80 mph indicated on the speedometer and sure enough, when I converted the kph shown on the HVAC I was always exactly 10% slower than the speedometer indicated. Can't say as I appreciate Porsche lying to us about the speed of our cars, but it's good to know.
Thanks, guys.
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