Well, a blown out fuse might not be the only issue...
I experienced a more complex problem that a jeweller or even an automotive electrician couldn't solve, and decided to send my clock to palo Alto Speedometer.They did a wonderful and drastic job , just converting the mechanism to quartz.Still cheaper than a new clock (circa €400! at SLS) and more respectful of the original, as the look remains unchanged (don't even mention this awful "quartz" logo...
).
Philippe from Paris
'71 280SL manual 4sp