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Hi

Something quite different this time...
A Mercedes Unimog 435 1300L, this came to me due to low beams and ignition always ON, discharging the batteries...
A lot of retrofits etc... have been done over the years, so you can imagine that some weird stuff was found...

UPDATE:
A bit of research later, something I should have done before record this video... revealed that the bigger switch, with the S modes, is the blackout switch, used by the military... Obviously this is no longer in use on this truck, and therefore no longer relevant. Unfortunately, due to all the addons and retrofits done, It is difficult to figure it all out how everything has been wired over the years...
Hope this makes sense at the end of the video.

Video for the fuel level indicator/gauge not working:
Unimog 435 Dual fuel tank level sensor not working... Fault finding and repair.
(To be updated once the video is published)
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Hope you enjoy the video.
Any questions or comments put them below.
Like always, thank you for watching!