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Yesterday the speedo needle on my 1995 Mercedes C200 failed to register until the road speed was around 30+ MPH, at which point the needle shot round to the 30+ point and operated normally - both up and down the scale. However, every time the car came to rest and then moved off, the needle misbehaved as described. This morning the same thing happened, except that the road speed at which the needle became operative was much lower - around 10 MPH. Trip and total mileage are registering as normal. All other gauges are OK. Can any one suggest a cause/cure. (I think I once read that static electricity on the 'perspex' needle might be involved). Anyway, if any one can suggest how I might overcome this problem I'd be most grateful. Thank you.
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