Speedometer Question

[lorirobin]

I have a 71 280SE 3.5 which had a 3.69 rear differential which I changed to a 3.27 from a 280SE 4.5.
Now the speedometer reads low along with the odometer.
Instead of having the speedometer re-calibrated could I install a speedometer from a 280SE 4.5
which should correct the problem. My understanding is Mercedes calibrated the speedometer to the
rear differential ratio. I guess I could just live with it, but I'd rather not.
Comments, suggestions?
Thanks,
Jeff

[homerj40]

Hi Jeff,

Have you talked to North Hollywood Speedometer? They specialize in VDO work on classic cars, they might be able to recalibrate it.

http://www.nhspeedometer.com/directions/

Good luck,
Darren

[Benz Dr.]

The 3.5 coupe has gauges like a 113 and the 4.5 has 108 gauges which are not the same at all. It may be that parts are interchangeable.

[450sl]

The correct ratio should be  (inkt) stamped on the back of the gauge ...........