Date registered: Sep 2008
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Speedo, Odo accuracy??
On my 1992 190E, I replaced the speedometer-odometer cluster as the odometer was broken. I found a new unit with the correct part #, and installed it. I noticed I was passing all other cars when indicating 65 MPH, so I drove through one of those radar mountae on a trailer at the side of the road that advises "Your speed is", at my indicated speed of 30 MPH, the radar said "35MPH", I tried it several times and always got the same answer.
The question here is: If the speedo is off 18%, does that mean the odometer is off by the same amount? When I checked the mileage, I got 22.5 MPG, the same or similar to what I previously calculated before the odometer broke.