Interesting...I've not heard of that little clock drawing enough of a load to kill a battery. My car usually sits for a week or two between uses and I haven't had any problems with battery drain, though this week it's on a trickle charger because it has been sitting for almost a month and the battery is over 5 years old.

My radio has a clock built in, and one of my future projects is to replace the dash clock with a VDO tachometer driven by one of those magnetic pickups that you stick to the alternator. It looks possible in theory but I haven't bought the parts yet.

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1976 240D "Katja"