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post #2 of (permalink) Old 21st March 2009
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The - key should step the speed downwards as you're expecting it to. It sounds like you have a fault. As I recall from the schematics, the steering wheel buttons all just put different resistances across the same two wires. It sounds like there's a loose connection causing high resistance somewhere, and so the - button is being mistaken for the +

If the car's still under warranty (remember that the third year is limited to 60K miles) then get it down to a dealer before the warranty expires.
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