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Le châssis W123 couvre les 240D, 300D, 300TD, 280E et plusieurs autres modèles de coupés, berlines et wagons Mercedes des années modèles 1977 à 1985.

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Blaupunkt "Hamburg" SQM 23 buttons not remembering + bulb burned out

When ignition is turned off, radio buttons memory goes--

that is, have to be re-set to favorite stations.

Fuses are okay.

Is there a LOW power source which stays on, like the clock circuit, when ignition is OFF?

(2nd) Bulb--I'm about to pull radio because station-numbers illuminating bulb just burned out. Hopefully it'll be obvious how to get to bulb and perhaps "low power / always-"on" line will have its own replaceable fused line? Thanks.

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Chris

There is definitely a memory circuit that should have 12v when the key is off to maintain your presets etc.

If I remember correctly Mercedes from that period have European style fuses and I can't remember what other things might be on that same circuit that would now be not working if the fuse were blown possible the cigarette lighter?

Are there any other electrical items not working in the car?

I would check the fuse box first I recommend using a meter not a test light but that's your call and if all fuses are good pulling the radio is the next step again the meter will come in handy here checking the plug on the back of the radio for power and ground connections.

If all that tests ok then the problem would be on the radio and fix or replace would be your two options at that point.

Good luck

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83 240D and 300D sera éternellement reconnaissant.
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