86 or 87 SL Cluster

[Jack M]

Some time ago my speedometer in my 86SL started to be intermitent.
The Odometer always worked.

I have an 87 cluster that is supposed to be a direct replacment. As I researched I am finding that this may not be the case . Something about calibration. ????

What could be different between them and how should I deal with the speedometer.

The clock on the 86 cluster does not work what can I do to see if the 87 clock works?

Is there any way of checking the speedo out of the car?

Mr. MB (Enrique) in Reseda, CA will probably be doing the R&R.

Thanks, J