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Old 03-21-2001, 05:36 PM
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MBenzNL MBenzNL is offline
Join Date: Jan 2001
Location: the Netherlands
Posts: 1,417
The R129 300SL's came originally with 225/55-16 tires.
Twisting the stem of the speedometer needle changed the displayed speed on the older models with the Speedo cables. I doubt that anyone has messed with the speedometer needle on your car (you can check this by taking out the dash cluster; the cluster-parts have to be sealed with a sticker).
Personally I don't think there is a way to calibrate the speedometer...but I am not a mechanic!

1990 300SL-24
1993 C250D
with a minor 600+k kilometer
(the Netherlands)
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