Radio power wire

[m300cab]

I dont see radio on the fuse box. Is there a specific fuse to get power to radio and which fuse did it come from...I'm working on a 250SL

[mbzse]

Some info in this thread
https://www.sl113.org/forums/index.php?topic=27466.msg197221#msg197221

[wayne R]

Michael, i used  the small double fuse box on the passenger side
right by the radiator over flow tank,it is a hot  fuse ,even with ignition of,
as i like to use my radio with out turning ignition key,im not sure  if you have 280SL perhaps
it is different,look at bottom of photo, just see it. regards Wayne.

[m300cab]

Great, thank you for the guidance!

[Pawel66]

As stipulated in the post under the link Hans shared - you may have two wires in the harness - one for radio (powered when you turn the ignition key to accessory position or first position) and one for antenna - powered permanently.

They go to fuse box (link to supply in the post Hans provided link to) and through grommet in the firewall - to behind the dash.