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Has anyone else noticed that their speedometer is off?
I realized it after using my cruise control set at 74 (to avoid a ticket). All the cars were passing me when usually I am passing them when I'm set at 74 in my Benz.
So, I timed myself for 5 miles and calculated that I was only going 69, about 5 mph off.
Anyone else notice this? I wonder how difficult it would be to fix at the dealer - if it is a computer issue or if the whole dashboard has to come off to fix the speedometer. If that's the case, I can probably live with it so I don't have to take the risk of getting my dashboard messed up.
 

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My 2002 Spyder Cambiocorsa has the same 5 mph error. I've timed it and also checked it against two different GPS receivers and it gives a consistent 5 mph error. I asked my dealer's shop to check it out. they confirmed the 5 mph but offered no solution. I've seen this topic on other forums and the general conclusion seems to be 'that's the way they are.'

Enjoy your Maser!
 

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Our '02 Spyder has the same issue. Because the Maser Nav system sucks big-time, I took my Garmin 2610 with me on my last outing - it indicates ground speed.

With the Maser cruise set at 73 MPH, the GPS said I was doing between 68 and 69.
 
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