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Marty
Marty, Mercedes Technician
Category: Mercedes
Satisfied Customers: 53153
Experience:  Bosch Certified Master Tech. Over 35 years experience.
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I have a MB w126 500 sec 1983 Chnr: WDB12604412006277 where

Customer Question

Hey I have a MB w126 500 sec 1983 Chnr: WDB12604412006277 where the speedometer shows about 20 km/h to low, what can be the problem? I have just bought the car and do not now if the gearbox ore diff has been changed at some time. I'm also not sure that the instrument is the original.
Submitted: 1 year ago.
Category: Mercedes
Expert:  Marty replied 1 year ago.

Hi, welcome to Just Answer. My name is***** the odometer is accurate over a measured mile the problem would be with the speedometer. If both the odometer and the speedometer are off the problem would be in the speedometer drive or ratio on the transmission or with the differential ratio. I'm assuming that the tires are the original sizes.

Let me know if you have any questions.

Marty

Expert:  Marty replied 1 year ago.

Hi, I'm just following up with you on this question. Was my answer helpful?