This is a great thread, thanks for the info!
During the summer my 420's clock had been intermittent, now that its sub zero temps, the clock seems to be working most of the time. But its lost my trust in its accuracy. The cold has caused the caps to work again, but its time for some fresh stuff after nearly 2-1/2 decades.
My 560 is stored for the winter, im planning on retrofitting one of those nice EL backlit cluster inserts. And even though the clock works in that car, a cap refresher is in order; I might as well when the cluster is apart.
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Just my MB's:
1990 420sel - Winter DD - 410,000km
1990 560sel - absolutely showroom mint - 360,000km!