I was at the bone yard yesterday and pulled a speedometer from a 1984 300SE

The part numbers are
front: 126 542 73 57
back: GR 203/1/146 K=11288

Is there any way to determine the rear end gear ratio that this speedometer
is calibrated for? I am going to swap my rear end for a 2.47:1 unit and I am hoping that this speedometer will be for that ratio.

Thanks!

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Monika '74 450 SL
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'74 Jeep CJ5
'97 Jeep ZJ Laredo
Rudolf ‘86 300SDL
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'92 Subaru
'96 Impala SS
'71 Buick GS conv
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